Characters / Steins;Gate

The cast of Steins;Gate is not large. There are only the eight lab members, the Tennouji family that Okabe rents from and a few rarely appearing family members such as Luka's father. Names are in Japanese order (i.e. family name first, given name second).

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The Future Gadget Lab

Okabe Rintaro

^{Click to see Zero appearance.}

Voiced by: Mamoru Miyano (JP), J. Michael Tatum (EN)^{Other Languages}Aldo Ramírez (LA), André Rinaldi (BR)

Portrayed by: Daisuke Watanabe (stage)

Lab member 001 and the protagonist, an 18-year-old first year college student and leader of the Future Gadget Laboratory. Around a decade ago, in order to help Mayuri through a difficult situation he began styling himself as "Kyouma Hououin", an evil mad scientist, exasperating others with his chuunibyou antics. Despite his goofiness, he's actually pretty intelligent and has an intuitive grasp of much of what they're doing. He retains his memories when the past changes with complete clarity, an ability he calls the Reading Steiner.

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• Adaptational Attractiveness: Has a less gaunt figure and conventionally smoother face in the anime.
• Accidental Murder: In his first attempt to save Kurisu, Okabe steals Dr. Nakabachi's knife and tries to stab him with it when he's attacking Kurisu. Unfortunately, Kurisu takes the stab to protect her father and bleeds to death in Okabe's arms.
• Adaptational Nice Guy: The anime softens his more abrasive traits considerably.
• Alternate Universe Reed Richards Is Awesome:
  • Inverted in the Faris ending/Omega timeline where, instead of being a scientific genius, he is a friendless professional Rai-Net Access Battlers card player.
  • Subverted horribly in the Gamma timeline where he is physically fitter, richer and more disciplined but this is a result of him willingly joining SERN as a Rounder, spy and researcher. This version of him ultimately becomes a member of the Committee of 300, and despotic ruler of Japan in 2036 under the name Kyouma Hououin.
• Always Save the Girl: When the choice between saving Mayuri or saving Kurisu comes up, he admits that he honestly doesn't care that the latter involves allowing the world to remain with SERN's dystopia. After making his choice, in the True Ending he's also completely unconcerned with the fact that the future he's heading towards results in the near extinction of the human race. He's not going to allow Mayuri to die to save billions of people he doesn't know. Although in the sequel this gets modified when he sees that future first hand making him understand how awful it is and that some of the people who die include his friends. After that he becomes more concerned with always saving everyone. Later deconstructed in the noncanon movie, where he becomes so jaded by his experiences that he doesn't care whether he lives or dies, as long Mayuri and Kurisu are fine.
• Ambiguously Bi: He only ever seems to be into girls, as he himself admitted, but it's suggested that he's also more interested in Luka than he'd be willing to admit. Usually, he'd try to brush these odd feelings off by reminding himself Luka is a boy and he doesn't swing that way, but looking at how hard he struggles to even think so in the first place does seem to imply a lot of things about Okabe's sexuality.
• Amnesiac Lover: In the Faris ending, Okabe's meddling with time results in a world line where he knows none of his friends except for her, who he's been in a long-term relationship with. Of course, since Reading Steiner only lets him remember his experiences on the previous world line, he has no recollection of this. While this distresses Faris once she realizes he isn't play-acting as usual, they do agree to work towards starting a new relationship.
• Badass Labcoat: Deliberately attempts to invoke this trope with his wardrobe choices. Sometimes it even works. He's particularly thrilled when Kurisu starts wearing the one he bought for Daru that went unused.
• Becoming the Boast: "Mad Scientist Kyouma Hououin," the anarchist destined to overthrow the secret rulers of the world, starts out as just a fantastic alternate persona that Okabe uses to keep himself and Mayuri amused. By the end of the visual novel, however, Okabe has legitimately thwarted an actual evil conspiracy bent on using his time travel discoveries to control the world.
• Belligerent Sexual Tension: With Kurisu.
• Beneath the Mask: As noted in Obfuscating Insanity below, Okabe tends to retreat behind his Mad Scientist persona when he's troubled, especially in front of Mayuri, but in Luka and Faris' routes he upsets them by acting more normal than usual. When he acts like the person they know, they're much happier and he's much less stressed out. Kurisu, in a different take, appreciates it most when he acts like Rintaro and will flat out ask him his opinion as Okabe and not Hououin, though the opinions are generally identical.
• Big Brother Instinct: As Okabe admits early on, he basically adopted the Kyouma Hououin personality because he was worried about how flighty Mayuri is.
• Big, Thin, Short Trio: He's the Thin of the original trio, with Daru being the Big and Mayuri being Short.
• Break the Haughty: While he's a genuinely good person whose mad scientist nonsense he invokes are explainable as he used it for Mayuri to help her snap out of her grief over her grandmother's death. Okabe subconsciously turned it into his inflated ego over the years which bites him in his ass after he creates a small time machine from a phonewave with his labmemes together and plans to disclose it to the whole world. SERN tracked them down in their apartment by hiring Rounders to do so, one of them, Moeka pretended to be one of Okabe's lab members as a mole and has them under the organization as their hostages with the exception of Mayuri whom she murders her in cold blood. Okabe escapes from their grasp and uses the time leap function of the machine to attempt to rescue Mayuri from her countless deaths which can't be averted since he's in the Alpha worldline. He finally learns from his mistakes as Suzuha reveals herself as John Titor and points out the main cause of Mayuri's deaths, then decides to undo all of the D-mails that he caused, in order to save Mayuri but having also to sacrifice Kurisu's life as well which however can be averted thanks to his future self's "No More Holding Back" Speech
• Break Them by Talking: In the final arc before the True End begins, Okabe has to undo the last D-mail, the one that Moeka sent. However, he doesn't know what mail he needs to send to do it. To get that information, he forces Moeka to break by telling her how blatantly she's been abandoned in a way she can't fully deny. Oddly enough, though, this actually ends up being better for her psychologically. Until she gets killed anyway, that is.
• Catchphrase: "This is the choice of Steins Gate!", "El Psy Kongroo", among others.
• Celibate Eccentric Genius: Okabe will have you know that he, like the great Sir Isaac Newton, is a virgin entirely by choice and not at all out of social awkwardness or inexperience.
• Change the Uncomfortable Subject: This is a character tic of his. Whenever confronted with an awkward or difficult question, Okabe would play up his Kyouma personality, or segue into a different topic to talk his way out of the problem. It becomes less effective as the series goes on and Kurisu and Daru start wising up to his antics.
• Character Development: He starts out a somewhat Tsundere dork, but around the 13th he has to start growing up and becomes by turns rather clinical, depressed and frantic. By the very end he's found a happy (well, sort of) medium between these two points.
• Chick Magnet: Basically every female Labmem sans Suzuha is attracted to him in one way or another, and Luka counts as a "chick" as well under specific circumstances. While most of these romantic options are explored in the original game, Moeka's attraction to Okabe only becomes apparent in the My Darling's Embrace spin-off, where they become an official couple at the conclusion of her route.
  • Steins;Gate 0 further adds Maho to the roster.
• Childhood Friends: He has been close friends with Mayuri since childhood. Mayuri is actually the one responsible for his Mad Scientist schtick: When she was depressed after the death of her grandmother and seemed to be wasting away, Okabe began to act cartoonishly and treat her as his 'hostage' to make her move on. Later in the story, when forced to choose between the woman he loves and his little sister figure, he undergoes a sort of breakdown and is eventually compelled to save Mayuri anyway.
• Chuunibyou: Styles himself as a great and evil mad scientist fighting against a vague but presumably evil Organization. Mayuri isn't his friend, she's his hostage. And absolutely everything must be named in a foreign language or it just wouldn't feel right. His inner monologue admits that it's all a load of crap, but whatever, he's having fun. It is eventually revealed that he isn't keeping up the charade for his own sake, but rather because it entertains Mayuri and keeps her mind off her immense grief over the passing of her grandmother. In chapter 10, when he finds Mayuri at her grandmother's grave, Okabe remembers that years ago when her grandmother passed away, she was standing in front of her grave grieving most of the time and unable to move on which the young Okabe decides to create his second personality inspired from a TV show about a mad scientist taking a hostage to help Mayuri cope with her death out of strong bonds as childhood friends. Also, the Organization he is fighting against? It is real, in the form of SERN. Or rather, the Committee of 300 using SERN as a face to hide their true organization.
• Cloud Cuckoolander: He's a very goofy and over-the-top Mad Scientist who's too immature for his own good.
• Cold-Blooded Torture: Both SERN, in the Alpha world line, and Stratfor, in the Beta world line, subject him to this. Stratfor's torture actually puts him in a coma for 11 years, hence his "death" in 2025. Poor guy just can't catch a break.
• Conspiracy Theorist: He believes that there is a mysterious "Organization" that rules over humanity from the shadows, and that he is one of the few fighting against it. Naturally, over the course of the story he happens to stumble upon an actual global conspiracy (by SERN, the European Research institute that built the Large Hadron Collider to produce micro black holes and use Time Travel to enslave the rest of the human race). The real people pulling the strings behind them are the Committee of 300.
• Crossover:
  • Okabe ends up meeting with Aoi Sena from Chaos;Head in a one shot story called "Chaos;Gate", as he was in Shibuya during the time of that entry's narrative.
  • He also appears in Robotics;Notes DaSH.
  • Joins the expansive roster of #COMPASS as a gunner-class hero with a glass cannon playstyle and hijacking key points.
• Crotch-Grab Sex Check: How he confirms Luka has become a girl after the latter uses a D-mail to be born as a girl. He does it again after entering into a new Delta world line where he and Luka were a couple. Kurisu ends up clocking him over the head with a large book both times.
• Cruel and Unusual Death: In one ending, he is tortured to death by SERN operatives in 2025.
• Declaration of Protection: Swore to keep Mayuri safe and happy.
• Despair Event Horizon: Breaks down crying after countless failed time-leaps in order to save Mayuri and is in such a state of desperation that he actually attempts suicide. Of course, You Can't Fight Fate, and Mayuri's relief after saving him and finally being 'useful' while herself dying once again in the process only sends him further into despair.
• Determinator: He keeps putting himself through hell to save Mayuri, made worse by the fact that all the damage he does is known only by him. He keeps it together until he has to sacrifice Kurisu to save Mayuri at which he grinds to a halt and completes his breakdown.
  • And then his future self eventually jumps back from that, using his failure to save Kurisu as motivation to perfect the time machine so that his past self could save her.
  • In Steins;Gate 0, we get to see exactly what Future Okabe had to do to reach that point, which involved time-leaping thousands of times to get from 2036 back to 2011, to save Mayuri and Suzuha and ensuring they enact Operation Skuld.
• Do Not Call Me "Paul": "Call me Kyouma Hououin!"
• Everyone Has Standards: He usually tolerates Daru's perverted behavior with no more than a bit of eye rolling, but when Daru tries to trick Mayuri into cluelessly saying perverted things, or to sniff Kurisu's discarded lab coat after she leaves the lab for the day, Okabe yanks back on his leash hard.
• Evil Laugh: As befitting a Mad Scientist, he has a particularly loud evil laugh.
• Expy: Dub-only, but J Michael Tatum's performance reinterprets his Chuunibyou antics and speech patterns to the point that he's basically a human version of the Doctor.
• Faking the Dead: In Steins;Gate 0, 2036 Daru reveals to Okabe that he tricked the world into believing Okabe died in 2025 and hid his body until he woke up or could be woken up.
• The Fatalist: In Steins;Gate 0, without a future Okabe to explain how to save Kurisu, Okabe completely gives up on trying to change the past. He's convinced that no matter what he does, there's nothing he can do to defy fate and even if he does so, he would be risking going back to the Alpha timeline where he loses Mayuri. It takes Okabe facing that the Beta timeline will also end in tragedy for him to aim for Steins Gate timeline.
• Forceful Kiss: In order to stop Moeka from screaming for help he forcefully kisses her until she gives up.
• Freak Out: After the 13th, his personality takes a sharp and unhealthy turn for the worse as he struggles to avert Mayuri's death. After everything is said and done, he doesn't quite go back to normal, but he gets close. Depending on your ending, that is.
• Future Badass: In the future Alpha timeline, he leads an international terrorist group against SERN. In the Beta timeline, he creates an advanced version of the original Alpha timeline time machine.
• The Gadfly: He loves picking on Kurisu, usually by using nicknames that he knows she hates.
• Geek Physique: Okabe is scrawny and unathletic. Even climbing up a few staircases is enough to exhaust him.
• The Gift: He has an ability he calls the Reading Steiner that allows him to have continuous memories even when the past changes. While it's not entirely exclusive to him, it's much stronger for him than anyone else. It's implied that it came about as a result of a childhood fever that nearly killed him.
• Giver of Lame Names: It's noted that his naming sense is terrible, to the point the others flat out veto his proposed names for what eventually becomes the D-Mail.
• A God Am I: Played straight in Suzuha's ending, and he often refers to his Sadistic Choices as playing God. Whenever he gives up, he usually mentions that he's tired of acting like God.
• Good Is Not Soft: He might be a purported mad scientist but he does consider his labmems his true friends. However, when Moeka, who was working for SERN all along, murders Mayuri in cold blood in front of him which he has to avert by time leaping back in time and undo all of the D-mails he sent, which Moeka is also a part of. As he confronts her at her apartment, he doesn't hesitate to give her a right hook punch to her face not only to force her to let go of her phone she's gripping to, given he wants to undo the D-mail for her, but also in retaliation for playing a role in Mayuri's death.
• Gratuitous English:
  • Styles himself a "Mad Scientist", spoken as is, following the Steins;Gate's choice. Kurisu notes in utter disbelief that the latter is actually half German. And on that note, one shouldn't forget "Christina", "Celeb Seventeen", and the myriad nicknames he cooks up for Kurisu throughout the series.
  • On several occasions, mostly in the anime, where he's forced to speak English to foreigners. His "English" is so hilariously broken that the listener either ends up replying in Japanese anyway, or taking his "Mad Scientist" spiel too seriously and having him detained.
    Rintaro: Hey Mister, I'm Mad Scientist! It's so cooooool! Sonuvabitch...
• Gratuitous Foreign Language: His other habit is to come up with Nordic mythology-themed names for his Operations at the drop of a hat. Though seemingly ridiculous and random at first, some of them do make sense in hindsight, however.
• Guile Hero: Okabe's not a fighter by nature, so he relies on his wits and his inventions to get himself out of sticky situations.
• The Heckler: Attends Dr. Nakabachi's and Kurisu's speeches at the beginning of the story and upon hearing something he doesn't like instantly begins heckling them. The difference between the two is obvious: His objections to the former are completely valid and he is nearly escorted out before Kurisu pulls him aside, and the latter knows exactly what she's talking about, stops someone from removing him and turns it back around on him to make him look like a complete fool.
• The Hero: He is the main character, after all. And he's ultimately a good-hearted young man, albeit extremely hammy and eccentric.
• Heroic BSoD: In the Steins;Gate 0 timeline, Okabe suffers a serious breakdown after he fails save to Kurisu and ends up accidentally killing her. He doesn't fully recover from it for a good portion of the game, literally having PTSD from the events of the previous game.
• He's Back!: In Steins;Gate 0, Kyouma Hououin makes his epic return after Okabe comes back from the Bad Future of the Beta timeline. And damn, it's awesome.
• Historical Villain Upgrade: In universe: In one future timeline he's known as a terrorist against the SERN regime. It's even true, but the terrorists are basically the good guys.
• Hit Me, Dammit!:
  • Okabe asks Suzuha to hit him for giving up in The Promised Rinascimento of Steins;Gate 0.
  • In the anime, he asks Daru to punch him because that's what he needed to finally snap out of his funk and go back to being Kyouma Hououin.
• Honorary Uncle: In the Beta timeline, Suzuha calls him Uncle since this Suzuha did meet him in the future, along with her father Daru.
• Hypocritical Humor:
  • He complains about how everyone calls him Okabe or Okarin instead of Kyouma Hououin like he'd prefer, but there's essentially nobody he calls by their proper names. He calls Kurisu in particular about half a dozen things that all irritate her rather than her actual name.
  • After Okabe begins heckling her during the seminar, she quickly recovers and then addresses all stupid questions and reasons why time travel won't work to him directly. He thinks it's really rude and gets defensive.
  • He's rather annoyed by the Viral Attackers "Black Peacock" shtick, despite his own delusions.
• Iconic Item: His signature red flip phone. It's popular enough to warrant several manufacturers producing replica kits or custom cases to give normal phones the same look. He ditches it in 0 for a smart phone, however.
• I Let Gwen Stacy Die: Steins;Gate 0 has Okabe mourning and blaming himself for Kurisu's death in the Beta timeline, especially after his attempt to save her resulted in him killing her by accident.
• I'll Be in My Bunk: In the VN, he was tempted to do so after accidentally seeing Mayuri and Kurisu in the shower.
• Improbably High I.Q.: Okabe claims to have an IQ of a possible but very unlikely 170 - whether he's just making it up or not is up for debate, as he has demonstrated prodigious intelligence in several fields of science.
• I'm Standing Right Here: One of his more frequent responses to Kurisu playfully and deliberately calling him names and such to the other labmems while he's standing right in front of her.
• Innocently Insensitive:
  • He's emotionally dense and can piss people off even when he's not trying to, such as picking at Kurisu's statement about how she hasn't seen her father in years and saying Luka is a guy when he's already born as a girl in some worldlines when it already occurred causing her to break into tears.
  • If you skip one of Mayuri's phone calls, he goes and talks to Moeka instead. Irritated at her sending him mails instead of talking even when face to face, he finally realizes that she's too socially awkward to speak, though he chalks it up to being scared of a super mad scientist specifically.
  • Played more seriously in a scene of 0. Okabe's enraged bursting after finding out that Daru and Maho had already remade the Time Leap Machine was accidentally overheard by the already saddened Mayuri just outside the lab, not to mention that his outbursts also inadvertently offended everyone's attempts to help Okabe. It takes Daru to punch him in the face and some verbal beatdowns from Maho to get Okabe calmed down.
• In-Series Nickname: Refers to himself as "Kyouma Hououin", though the only one to play along seriously is Faris. Mayuri and Daru call him "Okarin".
• Insistent Terminology: No matter the situation, no matter how much it is tweaked, the name of the PhoneWave (a cellphone connected to a microwave that can send mails to the past) remains "subject to change" to the end.
• Irony: Despite him fancying himself as a Mad Scientist whose crazy inventions will throw the world into utter chaos, Okabe spends most of the series trying to thwart the schemes of actual mad scientists and other evil-doers, thus averting the chaotic Bad Future and bringing about an era of peace through reaching the Steins Gate worldline, instead.
• Jerk with a Heart of Gold: Very insensitive, arrogant, and slightly rude, but he's a good guy. He definitely likes to act hammy, kinda pretends to be 'evil', and bickers constantly with Kurisu and Faris, though the latter doesn't seem aware that that's how he views the situation. However, he's actually pretty concerned about Mayuri and Kurisu and even forgives Moeka for murdering Mayuri after he understands the situation a little better.
• Labcoat of Science and Medicine: The uniform reserved for those who devote their lives to SCIENCE! He's thrilled when Kurisu begins using the other labcoat he got: Daru refuses to wear it.
• Large Ham: When he's acting out his Kyouma Hououin persona he tends to be very loud and theatrical. When Okabe himself shines through, he's inclined towards gloominess and is actually fairly mellow.
• Last-Name Basis: His given name, Rintaro, is almost never spoken by anyone. Daru and Mayuri call him Okarin and Faris calls him Kyouma, but not even the impolite Kurisu uses his first name. In a drama CD that takes place on a gamma worldline, Faris calls him Rintaro.
• Let Them Die Happy: In Mayuri and Kurisu's ending he forgives Moeka so that she can die in peace. Even after this is inevitably undone by the course of the plot, he still keeps his word. She's even invited to the club in the epilogue.
• Like Brother and Sister: He views Mayuri as a little sister figure and "precious thing to protect", though Mayuri herself seems to hover somewhere between utter devotion and a crush.
• Living Emotional Crutch: Mayuri is very dependent on Okabe after the death of her grandmother, but is beginning to feel like she's a burden on him. She also fails to realize that she's genuinely important to him and not just a thing to be taken care of. While this is mostly a worry of Mayuri's, very early on it does occur to him that perhaps the mad scientist game has kept her from growing up. Not that he'd say it in those terms, though.
• Loon with a Heart of Gold: He's ultimately good-natured, but he's undoubtedly a hammy, eccentric Mad Scientist.
• Loophole Abuse: The most notable example is him deceiving his past self using a clever loophole devised by his future self.
• Love Epiphany: When Kurisu encourages him to delete the first D-mail even if that means she has to die, Okabe realizes he is in love with Kurisu.
• Mad Scientist: He views himself as a great mad scientist, the scope of which is basically renting out a tiny apartment, calling it a lab and using it as a clubroom where he occasionally builds weird gadgets and proclaims Mayuri to be his hostage. This ridiculous persona is actually inspired by a television show that he and Mayuri used to watch during their childhood. Emulating this, he claims Mayuri to be his "hostage", to help her cope with her immense grief over her grandmother's death. It seems to be working fine and well, but after witnessing Mayuri's deaths multiple times due to the Alpha worldline convergence imposed on her, he stopped using it.
• Manchild: Often behaves like a melodramatic, socially inept and excitable child despite being age 18.
• Meaningful Name / Punny Name: Very early in the visual novel, Okabe mentions that he dislikes his real name, because it sounds like 'that elf boy's blue pipe thing', referring to the famous Ocarina of Time. What better way to signal to the audience that this is a story about time travel, than by naming the protagonist after a famous device used for such?
• Mistaken for Pedophile: Due to his... questionable personality and propensity for grandstanding, young Nae is rightfully weirded out by him, which leads to Mr. Braun assuming he's up to no good with his little daughter and threatening to either busting his head in, or raising his rent.
• Mistaken for Romance: A lot of people think he's dating Mayuri, but Okabe will correct them. She's his little sister and something to protect, not his girlfriend.
• Mourning Clothes: He spends most of Steins;Gate 0 dressed in black as he's still mourning Kurisu's death.
• My Greatest Failure: Accidentally murdering Kurisu and never regaining the motivation to save her. He manages to make up for this by sending a message to his past self to do what he could not and save her life.
• My Greatest Second Chance: After prioritizing Mayuri's survival over Kurisu's, Okabe doesn't forgive himself. But when Suzuha comes from the future saying she'll help him save Kurisu, he takes the chance without hesitating a second.
• Nerds Are Virgins: Nor has he had a girlfriend in his life. He may have lost it in Faris's ending, though.
• Nice Job Breaking It, Hero:
  • Allowing others to make D-mails causes Mayuri's repeated deaths.
  • The True Ending reveals that his arguing with Kurisu causes her father to snap and murder her.
• The Nicknamer: Enjoys giving other people nicknames based on their deeds, except Mayuri, who already coined her own nickname "Mayushii☆" and Faris, who doesn't use her real name anyway.
  • Daru's real name is Itaru, though it's rarely mentioned apart from when the origin of 'John Titor' is discussed to be based upon a multilingual pun by translating his name into English.
  • Kurisu gets the most nicknames: The Zombie for apparently coming back to life, Christina just to annoy her by getting her name almost right, Assistant to inflate his own ego as a Mad Scientist and a handful of others like Celeb Seventeen. Eventually he admits that he's too nervous to actually use her name.
  • Moeka is Shining Finger thanks to her ridiculous typing speed.
  • Luka is Lukako, which is putting a feminine ending on an ambiguous name that belongs to a feminine boy.
  • Suzuha becomes the Working Warrior after she irritably tells Mr. Braun that she's a warrior, apparently unaware that this makes her stand out juuuust a little.
  • Mr. Braun is itself yet another nickname to the landlord, Tennouji. His daughter Nae becomes Sister Braun. Nae doesn't really get why Okabe calls her father that. He also calls her Chipmunk sometimes.
• Nobody Calls Me "Chicken"!: Okabe is generally fine with whatever unflattering adjective people call him, if it's not coming out of Kurisu's mouth. However, he strongly dislikes being called a "chicken", "coward" or anything in that neighborhood.
• No Indoor Voice: KYOUMA HOUOUIN!
• No Social Skills: He's rather oblivious to how people are feeling a lot of the time, even when the spell it out for him. When he does notice tension he generally tries and fails to defuse it by going into his Kyouma Hououin shtick.
• Not Himself: Due to the effects of Reading Steiner, Okabe is able to retain his mind and personality regardless of which worldline he ends up in. This has the added effect of making himself look very out of character to those who are used to the way his counterparts behaved. Of particular note is during the Gamma worldline where "Okabe", who is supposed to be cold to and detached from everyone who knew him, even Mayuri, suddenly becoming considerate and kind once the "Prime" Okabe took over.
• Not So Stoic: Normally, Okabe would put up a calm and cool exterior, though if panicked or placed in an awkward situation he would start screaming in a very uncharacteristic high-pitched voice.
• Obfuscating Insanity: When the plot takes a turn for the depressing, Okabe occasionally hides his true thoughts, goals and emotions by using his mad scientist schtick.
• Oblivious to Love: He's pretty dense when it comes to others feelings and love isn't an exception. Faris and Luka are unable to get through to him without being really blunt about it. The latter came as a particular shock, causing quite a crash.
• Official Couple: After a lot of Belligerent Sexual Tension and Will They or Won't They?, there's finally a mutual acknowledgment near the end before Kurisu dies. In the true ending, the final scene shows the Kurisu he saved in the Steins;Gate worldline managing to find him.
• O.O.C. Is Serious Business:
  • When he, for once, calls Kurisu by her real name, she immediately picks up on the fact that something bad is happening.
  • Conversely, during Steins;Gate 0, because he's used the Kyouma personality so long some characters have trouble taking him seriously when he's actually trying to be serious.
• Perma-Stubble: Rather than looking pretty, he has a rather unshaven, sloppy appearance emphasized by his perpetual scraggly face.
• Phrase Catcher: "You're the last person I want to hear that from!"
• Platonic Life-Partners: With Mayuri. They have known each other nearly all their lives, are like family to each other and one of Okabe's main motivations is to protect her at all costs. This comes to a head when Okabe finds himself being forced to choose whether to save his little sister figure or his love interest.
• Politeness Judo: Not wanting to carry a heavy computer back to the clubroom and hearing Kurisu's refusal to help, he gestures to Luka to get him to offer to help. Once Luka does, he politely refuses and says he'll do it all on his own while Luka repeats his offer until Kurisu hesitantly offers to help out too, at which point Okabe instantly agrees, much to her surprise and irritation.
• Porn Stash: He has one on his computer, as far as the Hiyoku Renri no Darling spin-off goes. Okabe went to the lengths of scanning and saving all of his NSFW materials in an encrypted folder specifically to prevent the scenario where someone would barge into his room and find this, which is to say Mayuri. Not that that stops Mayuri from finding the stuff he didn't scan yet, anyhow.
• Properly Paranoid:
  • Though deep down he's not serious, eventually he really is being monitored by an evil organization. One that assassinates his best friend followed by kidnapping and enslaving his love interest, forcing her to work on time travel for them.
  • At the beginning, after a huge satellite suddenly appears on the rooftop, Okabe wonders if the security guard woman trying to get people back to the conference is trying to cover up the apparent device. It's beta line Suzuha, though this doesn't become clear until much later. The future of himself is also in there with her.
• Proud to Be a Geek: Okabe makes no effort to hide his questionable hobbies and passion for bizarre scientific endeavors. In fact, he plays them up in an effort to hide his true, socially awkward self.
• Rebel Leader: In the future Alpha timeline, Okabe founded and headed the resistance forces against SERN alongside Daru. Averted horribly in the Gamma world line where he's a willing member of SERN and the Rounders instead, and rules the dystopic Japan as a tyrant.
• Refusal of the Call: He spends most of Steins;Gate 0 trying to stay away from time travel stuff and refusing to prevent the Bad Future because he's way too traumatized by having seen both Mayuri and Kurisu die because of time travel.
• Ret-Gone: In the movie, the side effects of his time traveling begin to catch up with him.
• Ripple-Effect-Proof Memory: His "Reading Steiner" ability gives him a continuity of consciousness whenever the world is changed, but this means he has no idea how the current world works after changing the timeline. Thus, from the perspective of everyone else, Okabe just seems to spontaneously panic over the supposed disappearance of people that were never there or forgetting that Luka is and always was a girl. These tend not to go well for him, especially in the case regarding Luka.
• Sadistic Choice: Fate gives him one towards the end of the series, when he's forced to choose between condemning Kurisu or Mayuri to death. Thankfully, a third option presents itself, but only after he's been forced to make the choice once.
• Sanity Slippage: In the ending for Amane Suzuha his mind starts to run ragged from the sheer repetition and only Amane herself agreeing on a way out helps him. He goes from rescuing Daru from a truck to simply observing Daru nearly get run over with an intense level of indifference to contemplating incredible abuses with just a few repetitions, which horrifies him.
• Screams Like a Little Girl: Despite his baritone voice, Okabe is prone to high-pitched shrieking when he's startled, or when faced with Mr. Braun. The Hiyoku Renri no Darling spin-off provides plenty of these moments.
• Self-Serving Memory
  • After he and Kurisu finishing lugging a heavy computer back to the lab, he inwardly complains about how often she asked to take breaks and then out loud complains about her, after which she retorts that he asked to rest five times himself.
  • More seriously, when Moeka first assaults the lab and kills Mayuri he notices that she's upset, hesitant and shaking. As time goes on he slowly forgets this until in chapter 8 he remembers her being completely calm. Moeka is never like that so presumably he's just trying to vilify her in his head in case he has to kill her.
• She Is Not My Girlfriend:
  • He has this with Kurisu, mostly from the Lab Members, who just assume that they have a thing for each other. Both Okabe and Kurisu are in denial about it.
  • He also shares this dynamic with Mayuri in her routes.
• Shoot the Dog: When having to fix events so that Mayuri doesn't die he has to undo the happiness these events brought. Usually right in front of the person in question, who know what he's doing. He has to sacrifice Amane's peace of mind and happiness, Faris' father, Luka's chance to live as the gender he identifies with, and finally Kurisu herself.
• Shrouded in Myth: In the future, Okabe is a legendary terrorist, but apparently not much about him is known. This leads to Suzuha taking Okabe's nonsense utterly seriously in the present since she doesn't know that Okabe was actually just some dorky university student in 2010. It all sounds about right to her, after all.
• Smarter Than You Look: He seems like an idiot, especially early on, but as the story progresses it turns out he has a really intuitive way of understanding things and finds it easy to explain them in simple terms. In the present, he and Kurisu handle the bulk of the theoretical work while Daru handles tech stuff. In the future, he even invents a full time machine and a device to measure temporal deviations. Maybe his claims about his IQ were true after all.
• Stable Time Loop: His Kyouma Hououin persona is created through one in the movie. Kurisu told a young Okabe about Kyouma Hououin, and that story inspired Okabe.
• Star-Crossed Lovers: With Kurisu. In one timeline she dies just after meeting him and in the other they end up on opposing sides of global conflict. The only way for it to work is to find the Steins Gate choice and remove both bad timelines from the equation.
• Stepford Smiler: In the second half of the story he often hides what he's feeling behind his normal Large Ham attitude.
• Suspiciously Specific Denial: He quietly leaves the rooftop as ordered but definitely not because he was scared or anything.
• Taking the Bullet: One meant for Luka. This being the Gamma Okabe, who's on the cusp of his Face–Heel Turn, it's quite something.
• This Is for Emphasis, Bitch!: Loudly and melodramatically screams out bitch after accusing Kurisu of various vague crimes. Of course, it sounds absolutely ridiculous and unnatural.
• Took a Level in Badass: Okabe starts off as being an intelligent, but goofy guy roleplaying as a mad scientist. But as the story progresses, his determination to save Mayuri leads him to tracking down and beating Moeka - a trained killer - both physically and emotionally. By the end of the story and with a pep talk from his future self, he manages to find a way to Tricked Out Time which involves stabbing himself to convince his past self that Makise Kurisu was murdered and find the Steins;Gate world line.
  • This is taken even further in Steins;Gate 0, which examines what happens in the Beta world line, where Okabe doesn't go back and save Kurisu. He may be fraught with fear, regret, and depression, but thanks to his experience with saving Mayuri, he is far more savvy at noticing and handling dangerous situations. The differences between how he reacts to being held up at gunpoint in the first series and the second are very telling.
  • He's all too aware that Tennouji and Moeka are Rounders. But instead of avoiding and fearing them, he recruits them to help defend the lab and figure out the mystery of Kagari's past.
  • After he gets accidentally sent to the Bad Future of 2036, he time-leaps thousands of times to get back to 2011. This would have been a grueling process under normal circumstances, but he'd been avoiding time travel for almost an entire year by that point.
  • This process ends up causing him to revert back to his old Kyouma Hououin persona. Once he does, he becomes much, much more competent and proactive. In the anime, he utterly derails Leskinen's master plan by preventing him from stealing Amadeus, using Faris's Akihabara connections to flush out the Stratfor operatives at the Radio Kaikan, convincing Kagari to trust him, having both her and Moeka - two of his deadliest former enemies - as his backup in the final showdown, and ensuring Mayuri and Suzuha make it to the past. When the smoke clears and he knows the time machine has left, he starts cackling and gives Leskinen and the Stratfor operatives one of the most epic speeches in the series. This is the moment when Okabe stops pretending to be Kyouma Hououin, and truly becomes him. Leskinen may be a brilliant and ruthless scientist, but he's no match for Kyouma Hououin, a mad scientist.
  Kyouma Hououin: Listen well, you fools! Schrödinger's box has opened! The time machine you bastards sought to obtain no longer exists! It has gone through space-time and has completely disappeared! Writhe with anguish and tremble in fear! I, Kyouma Hououin... Against you fools and even fate, I will prevail! No matter what, I will find Steins Gate! That... is my choice!"
  • On top of all this, he masterminds Operation Skuld and the events needed to make it happen, and eventually completes a time machine to save Mayuri and Suzuha from being stranded in 18000 BC. The final scene in the anime has him show up and walk toward them with his hands shoved into his lab coat, bathed in a Pillar of Light, with a huge Grin of Audacity on his face. Now, that is Kyouma Hououin.
• Trademark Favorite Drink: He considers Dr. Pepper to be the drink of science!
• A Tragedy of Impulsiveness: The opening of the story is a Flash Forward of Okabe cursing himself out for repeatedly acting without thinking with something as dangerous as time travel. He keeps sending D-Mails back even after the first big change caused by Moeka makes him realize that the world can change in massive and unexpected ways from the smallest of actions. After this, he allows the past to be changed three more times, each time vastly altering who is around him and how close he is to ensuring Suzuha's Bad Future.
• Tragic Time Traveler: Once Mayuri and Kurise are killed Okabe goes into overdrive into going back in time to Set Right What Once Went Wrong. Unfortunately, while many of his attempts lets him save one of them, none let him save both of them, and some even end in a Bad Future. His consistent failure to save both of them nearly causes him to give up before Kurisu's Reading Steiner lets her unlock the memories of the previous timeline, giving Okabe the resolve necessary to achieve the Golden Ending.
• Troll: Occasionally pulls stunts that freak out the other Lab Members just for laughs, usually with Kurisu as the main target. Special mention goes to the Drama CD where he pretends to have used the D-Mail to make himself a completely normal person.
• Tsundere: He hides behind his eccentricities when he's being nice to people because he's kind of awkward. He's not very subtle about it either. Even his internal monologue refuses to admit that he likes anyone. For example, the only time he notes that Kurisu is attractive is their first meeting when he's baffled as to why she's even talking to him. Also, his heart is beating fast from the sense of danger and no other reason, and that's a fact.
• Unwitting Instigator of Doom: It is because of his and Daru's accidental invention of a time machine in the form of the PhoneWave (name subject to change), that SERN (and later Stratfor) started targeting him and the Labmems for it, bringing about a multi-party conflict that gradually snowballs into World War 3 and eventually a Bad Future.
• Weirdness Magnet: Lampshaded by many characters in both the original visual novel and 0. Okabe with his own wacky personality seems to have a knack for attracting equally-unusual characters to his lab, from perverted Otaku hackers, to ditzy airheads, to a Chuunibyou Cat Girl Ojou, and so on.
• What You Are in the Dark:
  • Kurisu suggests that if Mayuri's life is at stake and time travel will revert any damages he causes, he could simply physically force Rukako to tell him her mother's old pager number or kill Moeka to take her phone. He refuses. This is one thing that sets him apart from Dr. Nakabachi, who was intending to undo the murder of his daughter with time travel if it came to it since he figured it wouldn't really matter in the larger scheme of things.
  • Brought to a head in Suzuha's ending, where his thoughts get very dark, knowing that there's no way he can be punished for his crimes. Despite going through massive Sanity Slippage (implied to be partially due to damage from the Time Loop Machine) he never actually does anything wrong.
• Would Hit a Girl: Despite his initial reluctance, when he deems it necessary he attacks Moeka, pins her and nearly kills her in order to take her phone and try to save Mayuri. However, eventually he's forced to admit that he needs to solve this problem with diplomacy rather than force and decides to break her by telling her she'll commit suicide in a few days because she thinks FB abandoned her.
• Your Days Are Numbered: In the Alpha and Beta lines he's destined to die in 2025, not a day earlier or later. Until then he can't be killed, however, and it's implied that he can't be successfully detained for long in the Alpha line. If he were to be captured before his time, he couldn't fulfill his destiny of being an infamous terrorist. Eventually, he escapes both lines and manages to reach the Steins;Gate choice to reach a third world where SERN does not take over, there is no nuclear war and Kurisu survives. His ultimate fate in this line is unknown, but this will at least be a far less dangerous world for him than the other two.

Makise Kurisu

Voiced by: Asami Imai (JP), Trina Nishimura (EN)^{Other Languages} Camila Vázquez (LA), Maitê Cunha (BR)

Portrayed by: Erika Tonooka (stage)

Kurisu is an 18-year-old Teen Genius apparently killed at the very beginning of the story, only to appear both alive and confused at Okabe's assertion that she's supposed to be dead. She becomes the fourth and final of the primary lab members and does a lot of the work on the time machine. Despite her excellent skills in physics, she's actually a neuroscientist. More than that, she's also a Closet Geek and noted to be quite the blatant Tsundere.

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• A-Cup Angst: When Mayuri tries consoling the retconned-into-female Lukako about chest size not mattering, Kurisu does a Spit Take. She also gets upset when Faris tells her the uniform won't fit Kurisu. She instantly assumes it's about the chest size, but Faris just meant her height.
• Adaptational Badass: She's one of the 2 guest characters in the 2D fighting game Phantom Breaker, and is the only normal human but she can fight an even match against superpowered adversaries using lab gadgets. It should be noted that she's among the only 2 characters who have 2 supers.
• Adaptational Nice Guy: Her Internet Jerk attitude is massively downplayed in the anime adaptation.
• Adaptation Dye-Job: Kurisu's hair is brown in the original visual novel, but has red hair in the anime.
• Agent Scully: Initially, Kurisu completely denies any possibility that time machines could exist. Her tune quickly changes when she ends up helping Okabe build one.
• Amnesiac Lover: In the True Ending, Okabe has saved Mayuri, Kurisu and the future, but in exchange, she doesn't remember him. However, fragments of her memories survive, and she feels compelled to track him down anyway, which is expanded upon in the bonus episode for the anime. In the movie, Kurisu successfully falls in love with Okabe all over again.
• Awesomeness by Analysis: In 0, when Okabe is forcibly shifted from 1.064750 to 0.571082, she only needs to look at Okabe's Broken Tears for a couple of minutes to deduce that: 1. He has already escaped the Alpha Attractor. 2. He didn't shift himself. 3. She must be dead the last time her saw her. While Okabe is getting fresh air, she immediatelly pulls a backup PhoneWave with the intent of performing Heroic Sacrifice.
• Aw, Look! They Really Do Love Each Other: Kurisu and Okabe frequently trade insults, but they ultimately enjoy each other's company.
• Back from the Dead: The first plot point of the series begins when Okabe sees her lying in a pool of blood, texts Daru about it and then ends up in a world where for some reason she's perfectly okay. When he returns to his original world, she's dead, and his mission in the True Ending is to undo her death via Cosmic Retcon in order to prevent World War III.
• Bad Liar: See Suspiciously Specific Denial below.
• Belligerent Sexual Tension: With Okabe.
• Berserk Button: When Faris mentions in the Alpha Drama CD that her maid outfits might not fit Kurisu, Kurisu gets awfully touchy.
  Faris: Ah...! But... [my] clothes might not fit on you, nyan.
  Kurisu: By that... do you mean my breasts? MY BREASTS, RIGHT?!
  Faris: Your height, nya.
  Kurisu: You... forget I said that.
• Cannot Spit It Out: While it's obvious that she and Okabe are unwilling to admit they care about each other as more than friends, they seem to be at least somewhat aware of the other's feelings on the matter. During the My Darling is an Idiot! scenario it is implied that they are both afraid to cross that line since they don't know if they can be just friends again if it doesn't work out.
• Can't Hold Her Liquor: In the movie, she got drunk off a can of beer.
• Character Name Alias: While Okabe uses his Hououin Kyouma identity on @channel and Amane Suzuha uses John Titor based on wordplay and the name of a third party, Kurisu uses KuriGohan and Kamehameha in the same threads. Smooth.
• Clingy Jealous Girl: Played for Laughs in a Drama CD, though she does have her moments in the actual game as well. She is notably irritated by the fact that Okabe talks to Mayuri in a straightforward manner, but only uses theatrics for her.
• Closet Geek: Daru and Okabe recognize her quickly as a @channeler despite her frequent denials. She tries to hide it, but she keeps slipping up and dropping obvious memes into her speech.
• The Confidant: As things get more and more out of hand, Kurisu becomes one of the few people Okabe can confide to for help. Despite lacking Okabe's memories, she does her best to understand his situation and provide whatever aid she can. In the movie, she lampshades how he could never have gotten far without her and the others.
• Cordon Bleugh Chef: Kurisu enjoys making salad. Grapefruit salad. With some natto and ground beef thrown into the mix.
  Kurisu: Mixing stuff in makes it tasty. Grapefruit's sourness makes it a perfect match for anything.
  Okabe: No, it doesn't!
  Kurisu: Does too. You should try it.
  Okabe: There's a salad right here! One that's already made! And it's 50% off—
  Kurisu: —Ready-made stuff's no fun.
• Covert Pervert: Despite accusing Okabe and Daru of this constantly, she herself tends to be the first to get to a sexual conclusion on things, and is implied to be into BL.
• Damsel in Distress: In the finale, Okabe's final mission is to save Kurisu from dying in the Beta timeline to prevent a World War III and create the Steins;Gate timeline.
• Date Peepers: During Okabe's date with Luka, ostensibly to keep it running smoothly.
• Deadpan Snarker: She's never the last to send quips at Okabe whenever he's spewing out bullshit. Considering her personality (and his), the temptation must be strong indeed.
• Dead Person Impersonation: Seen in the movie when she attempts to personify Okabe's Hououin Kyouma to fill the spot that everyone keeps remembering. Her impersonation is spot on. This is actually an important detail, as Kurisu would later be revealed to be the one who technically created the "Hououin Kyouma" identity when she time travels to inspire a young Okabe to become a mad scientist who could protect Mayuri.
• Death Faked for You: In the finale, Okabe saves Kurisu from her death by getting stabbed in her stead and leaving an unconscious Kurisu in a pool of his own blood in order to trick his past self into believing that he saw a "dead" Kurisu. This allows the creation of the Steins;Gate timeline, in which Kurisu can be alive and World War III is prevented.
• Depending on the Artist: Although many jokes are made at her being flat-chested, Kurisu in the visual novel has an average bust size; her boobs are noticeable when sticking her chest out, especially in the shower scene. In the anime, Kurisu is depicted as being flat enough to not even be able to form a cleavage line.
• Deuteragonist: The second main character.
• Died in Your Arms Tonight: Okabe's first attempt to save Kurisu ends with him stabbing her by mistake and he holds her in his arms as she bleeds to death.
• Eating the Eye Candy: During one of the Somei Eichi no Cognitive Computing shorts, she is literally left breathless after looking at the outfits the machine suggested for Okabe.
• Fiery Redhead: In the anime, she has red hair and quite the quick temper when dealing with Okabe.
• Friendless Background: Focused exclusively on the sciences at a young age, eschewing just about everything else.
• Genius Sweet Tooth: Likes pudding. In the anime, she bonds with Okabe over a shared love of Dk. Pepper.
• Goofy Print Underwear: When Okabe visits her hotel room, he makes an offhanded joke about seeing teddy bear-print undies, and she immediately denies wearing those at the moment, having stopped doing that a couple of years back. Okabe being Okabe, this only provides him with more ammo to fire at her.
• Gratuitous English: She'll often greet, thank, or tell people to "Shut up!" in English, though Rintaro and Daru are the only recipients of the latter.
• Guilty Pleasure: Posting on 2channel, dropping internet slang, just to name a few. Often becomes embarrassed when Daru and Okarin point them out.
• Heroic BSoD: In The Movie, an attempt to help a younger Okabe backfires when she trips in the rain and causes him to be hit by a truck. Kurisu makes it back to the Steins Gate timeline unharmed, but her morale and emotions are wrecked.
• The Heroine: Downplayed in most of the series. She might be the female lead, but Okabe is the one doing the traditional heroic actions. She truly assumes the role in the movie, where Okabe disappears from the timeline and it's her turn to save him.
• Historical Hero Upgrade: In universe: In one future timeline she's referred to as the mother of time travel, but this is propaganda. Plus, she was forced into it after SERN raided the lab, killed Mayuri and captured her.
• Hypercompetent Sidekick: While Okabe is certainly intelligent enough to keep up, Kurisu's knowledge of physics and grasp of the time machine mechanics are probably Okabe's most valuable assets during each of his time-leaps.
• Innocently Insensitive: Regarding her strained relationship with her father, Shouichi aka Dr Nakabachi, in the Alpha worldline. She started learning physics as she read his papers at the age of five so she can live up to her father but at the age of eleven when she critiques his paper to the point she pointed out the flaws within, Shouichi is pissed off by her criticisms and also vent his anger out to his wife, it turns out it wasn't only his pride which she accidentally offended, it was his cherished memory of two of his close friends, Yukitaka Akiha and his mentor, Suzu Hashida aka Suzuha that she offended as his main goal is to create the time machine that will be dedicated to their memory otherwise in the Beta worldline where Suzuha never traveled back in time to be his mentor. It's averted as he's willing to kill Kurisu over his pride and pilfer her papers which is her time machine theory so he can take the credit for himself.
• In-Series Nickname: Multiple nicknames used by Okabe, mainly "Christina". There's also "The Zombie" or simply "Assistant". There was also the short lived "Celebrity 17" or "Celeb-17".
• Intelligence Equals Isolation: Prior to knowing Okabe & the lab members she doesn't seem to have had any friends. Like her father, her coworkers are jealous of her accomplishments at her young age. In one fairly comical scene between herself, Daru, and Okabe, she unintentionally reveals she's a virgin and has never been on a date.
• Internet Jerk: Most @channel users scoff at John Titor's comments, but Kurisu goes extra mile to insult Hououin Kyouma by replying to almost all off his comments with disdain and mockery. She continues doing so even after knowing Kyouma's real identity (Okabe), but decides to slow down after Okabe and Daru recognize her as an @channeler.
• Interrupted Declaration of Love:
  • She rushes back to the lab to announce her feelings to Okabe, but mere seconds prior, he had reversed the first D-mail. She's warped from the room and subsequently killed in the first timeline.
  • It happens again in the movie. The only difference is that this time Okabe is the one to vanish from the room as he is Ret Goned out of the timeline. She's even interrupted in almost the same spot in the sentence.
• In Vino Veritas: During the movie, she gets drunk off of a can of beer and becomes a lot more open about her feelings with Okabe, cuddling with him and rubbing against his cheeks.
• I Resemble That Remark!: The one thing she hates being called the most is "Tsundere", while behaving exactly like a typical specimen of the trope.
• Jerk with a Heart of Gold: Downplayed. She can be rather rude and abrasive towards Okabe because of his eccentricity and Daru because of his perverted remarks; other than that, she's genuinely kind and friendly, with Mayuri and anyone else, as long as you don't use inappropriate actions and constantly engage in petty arguments. Also, she proves to be Okabe's most reliable and loyal companion by using her remarkable intelligence to help him again and again.
• Lab Coat Of Science And Medicine: A preference for which Okabe is ecstatic to discover.
• Lame Pun Reaction
  Okabe: What do you mean 'oh god'? You trying to say Kurisu-chan is a Christian?
  Inner Monologue: When I say that, Kurisu looks at me with disdain
  Okabe: ...I regret saying it too.
• Last Kiss: Before Okabe undoes the final alteration to the timeline he realizes that Kurisu won't survive it and that he's fallen in love with her. After talking to her about it and explaining everything, she gives him a kiss goodbye, accepting her fate.
• Lethal Chef: Her apple pie is considered a lethal weapon.
• The Lost Lenore: Okabe spends the majority of Steins;Gate 0 mourning Kurisu's death in the Beta timeline and trying to get his life back on track after his failed attempt to save her.
• Love Martyr: Very much so towards her father. The man is nothing but a despicable Jerkass who hates her for being smarter and more successful than him and blames his own failures on her, yet Kurisu loves him and wants to gain his praise. Even when he attempts to murder her to steal her time travel theory, Kurisu protects her father from Okabe and ends up being killed in his stead, only for her father to tell her she got what she deserved.
• Meaningful Name: Okabe calls her "Christina" insistently; that the name derives from "Christ" is a clue to the final problem that she'll face. Having delayed Mayuri's death by a single day with each D-Mail he's removed from history, Okabe realizes and explains to Kurisu that the next logical step and possibly the way by which to save Mayuri completely is to delete the very first D-Mail. This D-Mail altered World Lines initially, making it so Okabe could live in a World Line where Kurisu didn't die; so, in order to save Mayuri, he must undo that D-Mail, consequentially killing Kurisu again. Having told this to her and she having spent time understanding the situation fully, Kurisu insists and eventually demands that Okabe allow the D-Mail that altered the World Line to be deleted. Once he deletes it, Kurisu exists only in the original World Line and before she is stabbed to death by an unknown assailant. Okabe, determined to save her, travels back to the moment of her death in an attempt to prevent it: in doing so, he ensures it by being the one to stab her to death. Failing the first attempt, he returns to reattempt to save her while allowing his original self to believe that she died, and this time he succeeds. So a character referred to as "Christina" by Okabe is sentenced to death by him, killed by him, and brought back to life as Okabe ensures his initial self believes she's dead - all as a means to save her and Mayuri, and the world from World War III.
• Nerds Are Sexy: Theoretical physics can be a very sexy thing, to Okabe if no one else.
• Nerds Are Virgins: And what's wrong with that!?
• Nice Job Breaking It, Hero: In the movie, she gets young Okabe killed while trying to save him. Thankfully, this is retconned in-universe.
• Official Couple: After a lot of Belligerent Sexual Tension and Will They or Won't They?, there's finally a mutual acknowledgment near the end before Kurisu dies.
• Omnidisciplinary Scientist: Is a neuroscientist, but is apparently well-versed enough in theoretical physics to conceptualize and build a time machine since she also studied theoretical physics to impress her father.
• Posthumous Character: Sort of, in Steins;Gate 0. The real Kurisu was killed in the Beta timeline; she only appears alive when Okabe is briefly teleported back to the Alpha timeline. Otherwise, she appears in the form of a Benevolent A.I. throughout the rest of the game.
• Precision F-Strike: Loudly says 'motherfucker!' to Okabe in the VN after he makes a choice to save Mayuri and Kurisu if you are on the right path to either her ending or the true ending which can be done by setting up one of the ending's flags.
• Present Absence: Steins;Gate 0 takes place in the Beta timeline where Kurisu was killed. However, her presence remains very much felt in the story through Okabe's mourning of her and people trying to get their hands on Kurisu's memories forms a good part of the plot.
• Red Herring Mole: Thanks to her role in the future Suzuha believes her to be SERN's spy, leading viewers to the same suspicion until Moeka reveals her true colors.
• Reflexive Response: Okabe tricks her into outing herself as a 2channer by saying "nurupo", which she automatically replies to with the customary "Gah!"
• Sacrificed Basic Skill for Awesome Training: During school, she focused entirely on mathematics to the exclusion of everything else. The only one that really comes up, though, is that she's not very well socialized.
• Sadist: She briefly adopts this persona during her short stint as a maid for MayQueen Nyan-Nyan in the Hiyoku Renri no Darling spin-off, and manages to attract quite a sizable fanbase who has the same Geeky Turn-On as Daru. She also became an Instant Web Hit among her peers in America, after a professor somehow found the MayQueen Nyan-Nyan PV and shared it with everyone, ensuring she will never live it down.
• Sarcastic Devotee: Frequently exasperated with Okabe's antics and wonders why the rest of the lab even follows him. At the end of the day, she's incredibly loyal and helpful to him.
• The Scapegoat: In the future, she's known as the mother of time travel. SERN values her for this, but groups that oppose this aren't happy at all. In truth she was a captive forced to research time travel, but because Amane doesn't know this she really hates Kurisu and assumes she's a spy.
• She Knows Too Much: It's implied that she's executed by SERN after completing their time travel device.
• Shipper on Deck: Oh yes. Despite how she vehemently tries to hide her true fetish, Kurisu ships Okabe with both Daru and Luka on many occasions, the latter being more common. In the Delta worldline where a male Luka and Okabe became a couple, she doesn't even bother trying to hide her giddy excitement at the prospect of them going out together, which drives the latter up the wall.
• Ship Tease: She gets a lot of Tsundere moments towards Okabe and is even less subtle during her texts. She also basically ends up on a date with Okabe when they're both wondering how to settle his actual upcoming date with Rukako.
• Smug Smiler: If she's not flustered or disinterested, Kurisu's expression towards Okabe would almost always be this, with Badass Armfold and an added cheeky wink for good measure.
• Star-Crossed Lovers: A relationship with Okabe is next to impossible since in one timeline she dies just after meeting him and in the other they end up on opposing sides of global conflict. The only way for it to work is to find the Steins Gate choice and remove both bad timelines from the equation.
• Straight Man: She plays this to the other three members' antics. And would almost be convincing in the role if she didn't inadvertantly pepper her retorts with internet memes.
• Suspiciously Specific Denial: Combined with Bad Liar. While she tries very hard to hide her Covert Pervert status, every now and then Okabe and Daru would come to suspect her of dabbling in such things as BL, or going merchandise-hunting at ComiMa in secret. It takes very little effort for Kurisu to spill her guts on her own.
• Taking the Bullet: When Nakabachi strangles Kurisu and attacks her with a screwdriver, Okabe takes Nakabachi's knife and tries to stab Nakabachi for Kurisu's sake. However, Kurisu ends up taking the stab to protect her father.
• Teen Genius: From an early age she studied math and science like crazy at the expense of everything else, which has left her a more respected scientist than her father even though she's seventeen when the story starts.
• Textile Work Is Feminine: In the movie, she sews the sleeve of Okabe's lab coat and gives him a spare, while denying that she bought the spare lab coat for him.
• Trademark Favorite Food: She's frequently seen eating cups of pudding, and complains with Okabe eats one of hers. She also bonds with Okabe over a shared love of Dk. Pepper.
• Trust Password: The first time she gets Okabe to open up about time travel, she tells him that it'll be easy to get her to believe it again when he goes back in time. Turns out she doesn't! Luckily, she told him what she was looking for most at the moment was My Fork, something that both highly embarrasses her and finally convinces her.
• Tsundere: Lampshaded time and time again. She's a highly stereotypical tsundere despite her protests and despite the fact that she really ought to know exactly what characteristics to avoid. She tends to be grumpy and sour to Okabe, but she's also always there to help and shows genuine worry about him.
• The Ugly Guy's Hot Daughter: Her father Doctor Nakabachi has a rather toady appearance while she's quite beautiful. Averted in the anime, where her father's looks are bumped up to around average.
• Unkempt Beauty: Downplayed. Between her very plain hairstyle, her unlaced shoes, loose tie and her coat perpetually falling below the shoulders (which makes her sleeves seem overly long), she gives off a slightly off-hand vibe, but is no less pretty.
• Unwitting Instigator of Doom: Her expertise in physics can be co-opted since she's just a young, relatively unknown student. In the timeline the story primarily takes place in, she was captured by SERN and forced to perfect their time travel and died not long after. In the other time line, she was murdered by her father and her research was stolen and taken to Russia. This sparked a nuclear war that killed five and a half billion people.
• "Well Done, Daughter!" Girl: She wants her father to acknowledge her and the reason she made many researches was because she wanted to impress her father. Unfortunately, her father is an asshole who only envies and resents her for her intelligence.
• What Beautiful Eyes!: Right near the start, Okabe is startled at how beautifully pure and strong her eyes are. This is pretty much the only time he's willing to acknowledge any attraction to her.
• Yandere: In the drama CD we see a simulation of her do this.
• Yaoi Fangirl: Implied to be one, much to Okabe's horror when she states she imagined such a thing between him and Daru. She's also unnaturally thrilled about the prospects of Luka and Okabe getting together, again to the latter's dismay.
• You Called Me "X"; It Must Be Serious: When Okabe begins to properly call her Kurisu, she's quite startled and knows what whatever is going on with him must be serious.
• You Have Outlived Your Usefulness: In the Bad Future, she's captured by SERN and forced to assist them with time travel research, which finishes in 2034. Super coincidentally, she dies immediately afterward. To paraphrase John Titor, there are two kinds of people in SERN's dystopia: Those who live extremely long lives and those who die suddenly under mysterious circumstances.

Shiina Mayuri

^{Click to see Zero appearance.}

Voiced by: Kana Hanazawa (JP), Ashly Burch^note (credited as Jackie Ross), Megan Shipman^note (for second half of Steins Gate 0) (EN)^{Other Languages}Estephania Estrada (LA), Bianca Lua (BR)

Portrayed by: Rina Koike (stage)

Labmem 002 and called Okabe's "Hostage" after a game he made to cheer her up, which is the foundation of his current Chuunibyou schtick. Though his childhood friend, she's two years younger and is still in high school, so he views her as a little sister and works hard to support and protect her. She's noted to be fairly useless as far as advanced physics go, but nobody minds since she makes sure everyone gets along. She works at the maid cafe May Queen with Faris and enjoys trying to make Luka wear the cosplay outfits she designs herself.

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• All-Loving Hero: Despite her ditzy attitude, Mayuri cares about everyone's well-being especially In 0, not only Okabe when he's in long-term depression over Kurisu's death but even everyone on earth too when she learns about the Bad Future of World War III occurring in the beta worldline that in the ending, Recursive Mother Goose and Altari and Vega, she's willing to use Suzuha's time machine to travel to the past risking her life to make her past-self slap some sense into him so he can start averting Kurisu's death and also the Bad Future with his own hands so they can travel to the Steins;Gate worldline and did so not only to give everyone a better future but to also sacrifice her happiness for him and Kurisu.
• Big Eater: Established in-universe. Mayuri seems to have an endless appetite for bananas and Juicy Karaage Number One, and some of the group shots in either game has her sitting around munching on either a bun or an onigiri, though somehow she still manages to maintain a super-petite figure despite the caloric intake. Okabe mentions this several times throughout the original visual novel, but always brushes it off as a mystery he will never understand.
• Big Ol' Eyebrows: Though nobody comments on them.
• Big, Thin, Short Trio: She's the Short of the original trio, with Okabe being Thin and Daru being Big.
• Buxom Beauty Standard: Downplayed. Her ample chest isn't often brought up in conversation, but whenever it is it's usually to cause A-Cup Angst to Luka or Kurisu.
• Character Catchphrase: She likes to greet everyone with a friendly "Tutturu~".
• Childhood Friends: She's been friends with Okabe for a long time. A part of her longs for a Childhood Friend Romance, but she's never treated as a serious romantic option.
• Cloud Cuckoo Lander: She is often oblivious to the world around her, sometimes blissfully so, exhibits some rather weird believes, and obsesses over strange details at times.
• The Confidant: Mayuri has a hard time keeping up as the story begins to escalate, but she always, unfailingly offers a shoulder the others can lean on.
• Cosplay Otaku Girl: She loves cosplay, but is only interested in making the costumes and having others wear them.
• Cruel and Unusual Death: She is subjected to several of these during the climax of the visual novel, with notable ones include being turned into a jellyman by SERN's bungled time travel experiment, and being run over by a metro train after taking an errant surprise shove from Nae.
• The Cutie: She's sweet and innocent in contrast to the other three primary members of the group who tend to be the ones really doing the work on the time machine. Her primary contribution is bananas to experiment on which causes SERN to view her as expendable and mark her for death.
• Damsel in Distress: Okabe's motivation to go back to the Beta timeline is to save Mayuri from her death in the Alpha timeline.
• The Ditz: She tends not to understand anything that's going on in the lab and unlike Daru doesn't seem to get it even after having it simplified. When Mayuri says that one of the names Kurisu came up for to describe what they're doing was too complicated, Kurisu nearly says it doesn't count because Mayuri is dumb, which Okabe catches her on.
• Dumbass Has a Point: It's kinda mean to call her a 'dumbass' since she really doesn't understand high-level scientific knowledges but she does have sharp intuition when after Okabe, Kurisu and Daru hacks into SERN's top-secret files to understand how to time-travel using the Phonewave, she tells Okabe what they are doing is downright dangerous and also wrong which she's right as Okabe changing the past a few times with the D-mail culminates into traumatic events for him as he sees Mayuri dies right in front of him multiple times despite trying to rescue her which is because of the Alpha Worldline convergence that demands her death as by fate.
• Early Installment Character-Design Difference: Mayuri is depicted with a more mature facial complexion in 0 that downplays her ditziness.
• The Face: She serves as a sociable hub/mascot for the lab. Of all the members on the science team, she's the closest they have to a public relations specialist.
• Futile Hand Reach: She sometimes reaches her hand to the sky, a gesture Okabe calls "Stardust Handshake." He's not quite sure why she does it, but it makes him a little uneasy.
• Gamer Chick: She's a big fan of RaiNet but there's no indication that she's actually any good at it. Rather, she just thinks the mascot is adorable.
• Get A Hold Of Yourself Man: She slaps Okabe in the middle of his despair induced breakdown fueled by Kurisu's death, which motivates him to not give up on saving Kurisu and win over fate. Funnily enough, the events of Steins;Gate 0 begin because Mayuri *doesn't* slap Okabe after his failed attempt to save Kurisu, since Okabe gives up on changing Kurisu's fate.
• Guide Dang It!: Achieving her route in the Hiyoku Renri no Darling spin-off is rather difficult without trial and error. The game sets up a soft "checkpoint" of sorts when Okabe is presented with four chances to send a D-mail during the prologue, which branches into the other routes depending on if/when the mails are sent. Mayuri's route condition additionally requires that Okabe read and reply to some of her early-game emails in a predetermined sequence, while ignoring certain ones from the other labmems. Miss one of these emails and her route will not trigger.
• The Heart: She's not good at the whole time travel thing, but she is good at making people get along.
• Hidden Buxom: While somewhat obscured in her usual sundress, the Beach Episode reveals that she's actually quite well-endowed, perhaps second only to Moeka in that department. Downplayed when wearing her form-fitting MayQueen uniform, and her new outfits in Steins;Gate 0 show her large bust with better clarity.
• Hopeless Suitor: It's hinted at in the original and confirmed in the prequel that she has always carried a torch for Okabe. She doesn't try anything because she knows she has little chance to be anything other than a sister in his eyes.
• Incorruptible Pure Pureness: She's a pretty mild example: While Okabe and Daru are all gung-ho about hacking into SERN and other dubious activities, Mayuri disapproves even when it's clear that SERN is up to some pretty shady business.
• The Ingenue: She's very innocent, right up to the point of repeating whatever dirty sounding things Daru asks her to without comprehension.
• In-Series Nickname: "Mayushii", a nickname she gives to herself.
• I Want My Beloved to Be Happy: Mayuri is actually very jealous of Kurisu due to Okabe's interest in her, due to her own hidden feelings for him, and the thought that he'd left her behind to go after someone else. Regardless, she'd still wholeheartedly support Okabe's pursuit of Kurisu in Steins;Gate Zero, as his own happiness is more important to her than her own.
• Kiddie Kid: She's 16 years old, but acts much younger than her age.
• Kill the Cutie: The turning point of the story comes when SERN deems her expendable and disposes of her. From that point forward Okabe goes through loop after loop to save her from Moeka, SERN and even the universe itself, which views her as 'dead.'
• Kindhearted Simpleton: Downplayed. It becomes pretty clear that whatever good qualities she may have, a high intellect is not one of them. Despite her ineptitude, she is capable of reading people's emotions easily.
• Leitmotif: Quiet Air, a soft remix of the Laboratory theme that plays in scenes involving Mayuri.
• Like Brother and Sister: She and Okabe have known each other all their lives and they act like a protective older brother and his cute little sister.
• The Load: Okabe admits early on that Mayuri adds nothing to the lab since all she does is sew clothing for cosplay. She's around because she's Okabe's friend and it doesn't really matter if she's useless.
  • Of course, when the plot gets more involved she's as useless as before, causing her to get worried about Okabe since that's all she can do. Subverted in Linear Bounded Phenogram side-story, where she takes the plot into her hands by probing Kurisu and Okabe for information and sending a D-mail to take everyone to the Omega timeline with no casualties.
  • 0 explains that Mayuri's role as The Heart is actually vitally important, as it's what keeps Okabe going. The entire crux of the plot is that in this timeline, Mayuri never convinced Okabe to not give up, thus he ended up spiralling into a Heroic BSoD for years and missing the window to fix everything. Mayuri realizes this and goes with Suzuha in her time machine on a one-way trip which will leave the two of them stranded in the distant past, so that she can talk to her past self from right before the pivotal moment and tell her what needs to be done to avert the Bad Future.
• Locked Out of the Loop: During the later story arcs she notices Okabe is very stressed out, but since she's the one person he's not willing to walk about this problem with under any circumstances, she's left feeling like a burden.
• Look Both Ways: How she dies in several timelines, including one instance where she's pushed into a speeding train, usually by SERN's doing.
• Love Confession: Makes one to Okabe in the Hiyoku Renri no Darling spin-off, and another in Steins;Gate 0 right before she leaves with Suzuha in the time machine.
• Mondegreen Gag: Due to her nature as The Ditz, Mayuri often mishears complex phrases or names flung her way, and will recite them as is, if not more broken.
• Morality Pet: While Okabe and the rest of the characters aren't really jerks, they're all a bit lacking in social skills. Mayuri tends to bring out the nicer sides of all the characters.
  • Her moral conscience becomes a crucial point for Okabe and the others relating to time travel as she knew despite her lack of knowledge in science, she has straight common sense upon realizing that utilizing time travel with the phonewave to tamper with the past for their personal reasons can potentially create horrific consequences for everyone as her deaths caused by the convergence of the Alpha worldline proves it.
• Nice Girl: She may be a less intelligent person when it comes to scientific knowledge but she's happy, friendly, supportive, social and incredibly charismatic in contrast to tsundere Kurisu or emotionally bottled Moeka.
• The Not-Love Interest: Mayuri is Okabe's oldest and dearest friend, and we see how much effort he puts in trying to prevent her death. It eventually comes to a head when Okabe has to decide whether to save Mayuri or his actual love interest, Kurisu. She does have an ending, but it's a very token affair that is basically Kurisu's ending with some different dialogue and no access to the true ending.
• Official Couple: With Okabe, naturally, at the end of her route in the Hiyoku Renri no Darling spin-off. Unlike most of the other potential love interests, she ends up marrying him.
• Older Than She Looks: Mayuri is in highschool, however she's actually rather small in stature (discounting the one area that matters). Okabe even describes her as "a highschooler who looks like a middleschooler".
• O.O.C. Is Serious Business:
  • When she slaps Okabe after he failed to save Kurisu the first time.
  • When she boldly expresses her feelings for Okabe in most of her routes, especially when they're alone with each other or something big is about to change their lives forever. Or both.
• Patient Childhood Love Interest: She's Okabe's childhood friend with a long-term crush on him despite knowing he doesn't feel the same way. Instead of trying to get Okabe to see her as a love interest, she stays by his side as his little sister figure.
• Platonic Life-Partners: With Okabe. They have been together for a really long time and they are easily the most important person in each other's lives. Okabe actually spends most of the series scrambling to prevent Mayuri's death to the detriment of some of his other friends, and eventually having to sacrifice even his love interest, Kurisu.
• Protectorate: Effectively what Okabe means when he calls her his "hostage"; he has to keep Mayuri close to him in order to protect her and keep her safe at all times.
• Raven Hair, Ivory Skin: Having black hair and clear skin defines her appeal.
• Smarter Than You Look: She's not very bright, but she does have strong intuition and tends to be more emotionally perceptive than those around her. She's even the one to figure out who Suzuha's father is thanks to actually paying attention to what people say and do more than Okabe or Kurisu would.
• Stealth Hi/Bye: If Okabe doesn't keep an eye on her, she'll frequently wander off somewhere without saying a thing the moment he looks away. He calls it her "Sneaking Fadeout".
• Taking the Bullet: She dies pushing Okabe out of the way of a car in chapter 10.
• Third-Person Person: Always refers to herself as Mayushii instead of using a pronoun.
• Too Good for This Sinful Earth: Mayuri's always a sweetheart with no mean bone in her body but she will always die no matter how much effort Okabe puts into rescuing her from this fate through time looping as the Alpha worldlines he's in will always have the convergence set in place for her death. But on the other hand, she won't be able to witness the world that will be a shithole in the Bad Future with the dystopia created by SERN or precisely, the Committee of 300 to control the populations by stripping them of their humanity against their will.
• Trademark Favorite Food: She loves her Juicy Chicken Number One and bananas.
• Two First Names: Her family name Shiina can be used as a Japanese feminine given name.
• Your Days Are Numbered: The closer they are to 0% divergence, the sooner Mayuri will die, starting at the 13th and then moving back one day for every timeline changes Okabe undoes. At first this seems logical: SERN wants her dead. However, if Okabe manages to evade them, then she'll drop dead anyway. Eventually, it gets to the point where SERN isn't even after her yet, but she still drops dead because of convergence effects.

Hashida "Daru" Itaru

^{Click to see Zero appearance.}

^{Click to see Robotics;Notes DaSH appearance.}

Voiced by: Tomokazu Seki (JP), Tyson Rinehart (EN)^{Other Languages}Iván Fernández (LA), Bruno Casemiro (BR)

Portrayed by: Mitsuhiro Nagatomo (stage)

Labmem 003 and Okabe's best friend. He considers himself a Super Hacker and is an otaku with an unhealthy obsession with moe, but is almost as good at hacking as he claims and manages to access the SERN database. He has a crush of sorts on Faris, but he's not too serious about it. He doesn't get a lot of the advanced physics, but his skill with hacking and electronics more than make up for it.

He appears as a supporting character and namesake of the Robotics;Notes DaSH visual novel.

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• Adaptational Attractiveness: The anime adaptation and movie gave him a decidedly leaner and rounder design, with more defined and varied facial features compared to his chunky and angular look in the original visual novel. This further extends to 0 and its own anime adaptation, where it became his official design.
  • Even the anime adaptation of 0 takes it even further as Daru himself in the Bad Future suddenly becomes skinnier after reuniting with Okabe compared to the VN where while he's already lost a fair amount of weight, he's still overweight in a CG instead by that time it rolls in.
• Amazingly Embarrassing Parents: He's this to Suzuha, but only in 2010. His future self is remarkably less goofy than in his youth, but moments of it still surface every now and then.
• Beware the Nice Ones:
  • Daru may be a goofy, unassuming "Hentai" Otaku who lives and breathes erotic tropes, but he's also a "gentleman" as he calls himself, and genuinely cares about the wellbeing of his friends. Though he's not cut out for physical confrontations, harming or even thinking of doing so to his fellow Labmems is a good way to piss him off. He also doesn't tolerate shows of apathy towards a friend's suffering, as evident by his reaction towards Okabe's nonchalant attitude at the end of Luka's route, where he gives up on saving Mayuri's life.
  • He even takes a major one in the anime version of Steins;Gate 0 episode 16, when Okabe angrily insults Maho after the latter discovers that while also misunderstanding they were working on the phonewave as the time leap machine in order to save both Mayuri and Kurisu by finding the Steins;Gate worldline and Daru, fed up with his abrasive attitude, punches him in the face and tells him off for not understanding how he's not the only one with complicated problems as everyone does too.
• Big Fun: He's a big, fat and somewhat messy guy, but he helps keep the mood going with his generally laid back personality.
• Big Good: Both literally and figuratively. While Okabe is most usually The Hero, in all possible world lines where they know each other that lead to a Bad Future, it is Daru who would always be the center of La Résistance, with or without his friend, and the one to finish the time machine prototype to send Suzuha into the past.
• Big, Thin, Short Trio: He's the Big to Okabe's Thin and Mayuri's Short.
• Brilliant, but Lazy: He's a programming and engineering genius, able to hack into a high-tech research organization and build a working time machine, but for the most part he'd rather spend his time playing hentai games or visiting the maid café.
• Bromantic Foil: You need quite the contrast to make Okabe look attractive, so Daru is fat, perverted and sometimes obnoxious. Reversed in 0 where Okabe spends the visual novel depressed over Kurisu's death while Daru is a slowly building a relationship with Amane Yuki.
• Bunny-Ears Lawyer: A massive pervert though he may be, he's a very talented hacker and inventor.
• Character Name Alias: His codename is derived from changing Daru to Itaru and then translating the word to Barrel. Barrel Titor.
• Chivalrous Pervert: He insists he's a gentleman pervert. For all of his perverted tendecies, Daru is the nicest male of the Future Gadget group who's loyal, helpful and down-to-earth to his friends.
• The Cracker: He's an amazing hacker and is easily able to get into the SERN database, though when he comes up into a special code he's unable to break through it, which forces the group to find a rare old computer that can read it.
• Deadpan Snarker: He's rather sarcastic when it comes to Okabe's eccentricities.
• Disappeared Dad: In the Alpha timeline, he appears to be somewhat recently deceased, though he wasn't around to raise his daughter much either. It's very important to Suzuha to find him, though she knows little about him apart from an alias he used.
• Everyone Has Standards: While he mostly makes sarcastic quips towards Okabe, Kurisu states that even he was worried when he saw Okabe crying.
• Formerly Fat: Applies to his future self, who seems to have lost most of his girth during the years leading up to 2036.
• Future Badass: In the SERN timeline, after Okabe dies in 2025 Daru begins to lead the terrorist group at the expense of raising his daughter and builds a time machine, though it was not fully operational.
• Gadgeteer Genius: His future self was the one who created Suzuha's time machine.
• Geeky Turn-On:
  • Despite his usual demeanor, Daru is actually a closeted masochist, as demonstrated during Suzuha's route in the Hiyoku Renri no Darling spin-off, where she attempts to utterly break him to stop him from developing a crush on her. Rather than feeling devastated, Daru seems to get a kick out of being verbally thrashed like that, and the whole scheme backfired.
  • In order to gain popularity for MayQueen Nyan-Nyan during Faris' route, Daru volunteered to dress up in a maid uniform and titling himself "Darushii Nyan Nyan". This is promptly shot down by Kurisu and Okabe for obvious reasons. When that failed, and Kurisu is retooled into a Sadist character, Daru would constantly find ways to shoehorn himself in as her slave, much to her protests.
• Gentle Giant: Despite how massive he is, Daru almost never resorts violence and gets along well with the rest of the lab members, especially Okabe and Mayuri. See Big Good above. While it's notable he does have perverted tendencies that can make people around him uncomfortable at times, all in all he's pretty harmless.
• Get A Hold Of Yourself Man: In Steins;Gate 0, he punches a panicky Okabe after Okabe suggests that Maho wants Mayuri to die and Kurisu to live.
• Good Parents: In 0 due to Beta Suzuha sticking around after Okabe refuses to time travel again, she's living with him. While he's still a perverted otaku, he tries his best to help his future daughter.
• Heterosexual Life-Partners: Obake likes to call Daru his favorite right arm and in the alpha timeline they start the resistance against SERN.
• Hollywood Hacking: Just to show how terribly awesome a "Super Hacka" he is, Daru managed to hack into the internal database of SERN, possibly the most secretive and influential organization in the world, with just a rickety home PC. Also, if Unreliable Narrator Okabe is to be believed, he had also gained access to the MI6 in the past using that exact setup.
• In-Series Nickname: Everybody calls him "Daru".
• Insistent Terminology: It's HACKER, not Hacka! Also he's not a creep, he's a HENTAI gentleman.
• Lovable Sex Maniac: Whenever a girl lets loose an Accidental Innuendo, he'll ask them to repeat it. He also insists on having all the technical stuff explained to him in terms of eroge.
• Nerds Are Virgins: He's never had much luck with the ladies, and all of his friends expect him to be alone forever (which he begrudgingly agrees with). It's part of the reason why he, Okabe, and Kurisu have trouble believing he's Suzuha's father.
• Nosebleed: He frequently gets these whenever he thinks of something perverted, usually after asking Mayuri to repeat something she said in a suggestive manner.
• O.O.C. Is Serious Business:
  • As seen during Suzuha's route in the aforementioned spin-off. Normally laid-back, once Daru's set his eyes on Suzuha, he'd stop goofing around and start planning seriously for the future, to the point he almost inadvertently created a divergence that would erase her from existence.
  • In Steins;Gate 0 Vega and Altair route or episode 16, he immediately drops his goofiness to punch Okabe's face in rage when the latter went too far harshly berating Maho after discovering they were creating another Phonewave behind his back and telling him that everyone also has problems besides Okabe they have to solve and he has no right to trample over their feelings when they had already done much for him.
• Otaku: 2-D girls are the only girls for him! Except when they aren't, of course.
• Signature Headgear: His signature yellow cap with a printed-on question mark that he dons absolutely everywhere, even at his own wedding. He's still wearing this as of 2036, just to show how fond of it he is. The only time he's not seen wearing it is during the events of Robotics;Notes DaSH, where he has a boonie hat instead.
• Sneeze Cut: In the OVA.
• That's What She Said: He tends to irritate Kurisu by interpreting everything she says in a dirty manner.
• Wacky Parent, Serious Child: In 0, he has this dynamic with Beta Suzuha. Daru is still an otaku making perverted and stupid comments at everything while Suzuha tries to get him to stop fooling around and act more like the father she knows in the future.
• The Watson: Daru is intelligent enough to keep up with a little prompting, but he's not really into physics like Kurisu or Okabe, so they have to explain the plot to him in simple terms. With varying degrees of success.
• Yuri Fan: Daru never turns down the opportunity to imagine his non-Okabe friends having lesbian makeouts. Even Luka.
  Okabe: Lukako's a guy.
  Daru: That makes it even better.

Kiryuu Moeka

^{Click to see Zero appearance.}

Voiced by: Saori Goto (JP), Jessica Cavanagh (EN)^{Other Languages}Jessica Monzón (LA), Luciana Barbosa (BR)

Portrayed by: Yumi Sugimoto (stage)

Moeka is a silent and inexpressive young woman who prefers to communicate through her cellphone. She's looking for the IBN 5100 and is the fifth person to join the lab after Okabe bumps into her taking photos for the newspaper she works at. If left to her own devices, she'll never speak, but will send dozens of gigantic text messages at a time until the receiver is forced to respond. She doesn't contribute to the time travel work, but she sends the first major timeline-altering message to the past after she says she regrets her choice in cell phones and wants to redo it.

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• Adaptational Villainy: In the game, Moeka is very conflicted about gunning down Mayuri. In the anime, she has next to no reservations.
• Alas, Poor Villain: In the final arc before the true end she's shown not to be an emotionless, heartless and clinical woman who can bring herself to kill but rather a passive, manipulated and weak one that will do anything she's told. When dying, she apologizes.
• The Alcoholic: Okabe's scant trips to her apartment reveal that she drinks mainly beer or other alcoholic beverages in place of water, as evidenced by the heaps of cans everywhere, both empty and unfinished. In fact, she drinks them about as often as Okabe himself drinks Dr. Pepper.
• Attention Deficit... Ooh, Shiny!: Just watch how she cleans her room.
• Berserk Button: Try to snatch her phone from her hand and she will go berserk until the phone is back in her hands.
• Bespectacled Cutie: Her glasses help her look withdrawn and timid.
• Beware the Quiet Ones: Moeka communicates by using her phone to send messages to anyone frequently and rarely speaks but behind her quiet front is a well-combat-trained woman working as a rounder for SERN and willing to murder on the order of her superior, FB.
• Big Damn Heroes: In Steins;Gate 0, during Maho's route, she saves Maho and prevents Stratfor from taking control of Amadeus!Kurisu.
• Bungled Suicide: She attempted suicide once in the past. This emotionally vulnerable stage left her open to SERN's recruitment and she grew utterly dependent on her contact.
• Buxom Beauty Standard: She has a well-endowed figure, which can trigger Maho's A-Cup Angst just by being near her.
• Camera Fiend: She's always taking pictures of everything she sees with her cellphone.
• Cannot Spit It Out: In the Gamma and Delta timelines, Moeka harbors romantic feelings for Okabe, but couldn't find the courage to tell it to his face. It's implied that she is attracted to him in some manner in the Alpha and Beta world lines as well, but these cases aren't explored in detail.
• Character Development:
  • In her route, The Quantum Awakening in Linear Bounded Phenogram, Moeka still infiltrates the lab to find the IBN 5100 as usual, but she actually develops a genuine friendship and sense of loyalty with them this time. As a result, she would be willing to risk her life and defy her orders to protect them, such as when she rescued Kurisu from being run over by a Rounder car, and during the lab invasion at the end of the route, where she undergoes a Heel–Face Turn out of loyalty as a labmem, and then getting fatally shot for her troubles, but not before sending a D-mail hoping she will survive.
  • She gets a rather large dose of it during Maho's route in Steins;Gate 0.
• Cute Clumsy Girl: This is her hat during her short stint as a maid at MayQueen Nyan-Nyan. It's part of the Foolish Sibling, Responsible Sibling shtick that she and Suzuha put up, with Suzuha being the responsible "little sister".
• Deconstructed Character Archetype: Of the Shrinking Violet. Her character explores what would happen if a person who really had such a massive social phobia and zero self-esteem was reached out to by an individual who gave them nothing but positive affirmation. Similar to real-life cult recruitment, people become so dependant on their lone source of acknowledgment that they become willing to violate their own ethics if their person of affection requested it.
• Defrosting Ice Queen: Her entire route in the Hiyoku Renri no Darling spin-off is this.
• The Ditz: She is extremely clumsy and absent-minded, despite appearances. That, and her very short attention span.
• Does Not Like Spam: Apparently hates macadamia nuts.
• Driven to Suicide: Happened once in her youth. Moeka attempted suicide after years of being shunned by her peers and abandoned by her parents. It didn't stick, and she was taken in by FB. When she stops receiving FB's messages in the last loop due to having outlived her usefulness, she does it again, and this time it's for real.
• Drives Like Crazy: She drifts on the highway in Steins;Gate 0 under the justification of getting herself and Okabe to their destination more quickly.
• Dull Surprise: Barely anything gets a rise out of her. Moeka meets most encounters with a blank stare and a whisper-level voice. Until FB abandons her, or Okabe tries to wrest her phone out of her hands.
• Elective Mute: Prefers to use text messages instead of talking. Or singing, as demonstrated in her Hiyoku Renri no Darling route where she sends Okabe torrents of texts of the lyrics at breakneck pace instead of actually raising her voice. Downplayed with her Gamma timeline counterpart, who could speak normally without the use of a phone, but still prefers to keep things concise and to the point.
• Emotionless Girl: Moeka never shows any expression on her face or in her voice unless you do something like try to take her phone, though by reading the mail she sends it's clear how she feels about everything.
• Evil Costume Switch: Switches to a skintight black jumpsuit after revealing herself to be Rounder.
• Extreme Doormat: Deconstructed. She tends to be extremely passive and willing to follow directions from FB as a rounder for SERN even if they're orders that she's clearly not happy about carrying out such as killing her friend Mayuri. As Okabe undoes as many D-mails as he could to save Mayuri, Moeka, after sending the IBN 5100 overseas desperately tries to contact FB even though he wouldn't pick up, causing her to commit suicide because, like Mayuri, the Alpha worldline chose her death as its convergence.
• Faux Action Girl: Zigzagged. One of the major reveals of the game is that she's a Rounder working for SERN and she's well-trained in combat especially with guns. Indeed, when The Reveal first happens, it's made abundantly clear that no one in the Future Gadgets Laboratory could possibly hold their own against her, and even Suzuha can at best merely distract her long enough for Okabe and Kurusu to start the time-leap. So you'd think she'd obviously kick Okabe's ass when he arrives at her apartment in another worldline to pry her phone from her hands, but instead Okabe gives her an instant and easy beatdown because she's in the middle of a mental breakdown, and more fixated on her phone instead of him. Completely averted in Steins;Gate 0, she can use her gun even when she's still under her civilian identity to help out against enemies.
• Freudian Excuse: Her insane loyalty to FB is a result of her having been ostracized by her peers and abandoned by her parents as a child. After she attempted suicide, FB became the only person who ever actually acknowledged her existence, and she'll therefore do whatever they ask of her, even if it conflicts with her own morals.
• The Glasses Come Off: She's missing her glasses when she reveals to the lab members that she's a SERN agent.
• The Heavy: She's the most prominent threat the Future Gadget Laboratory faces after The Reveal, with her own actions being directly responsible for Mayuri's numerous deaths, as well as the danger Okabe finds himself in. Once Okabe finds a way to overpower her and discovers who she's working for, the actual Big Bad is dealt with relatively swiftly.
• Hidden Depths:
  • It's revealed in the Hiyoku Renri no Darling spin-off that she's the author of a surprisingly popular romantic young adult novel, though she'd appreciate it if nobody finds out.
  • In Steins;Gate 0 - during Maho's route, it's revealed that she is knowledgeable about classical music, seems to be a relatively competent investigative journalist, and is much more talkative than in the original game.
• Hypocritical Humor: When Moeka brings Okabe to her room as part of a photoshoot in the dead of night, she playfully asks him if he's going to attack her when she doesn't expect it. He is a scrawny teen, while she's a highly-trained Rounder capable of handing his ass to him many times over (and did, in the original game).
• I Just Want to Be Loved: Much of her current personality was attributable to her abusive childhood and her being an orphan. Having nearly killed herself in the past out of loneliness and feelings of worthlessness before the enigmatic FB stepped ito her life, Moeka desperately wants to be cared for and as such is easily manipulated.
  • To drive the point home, her Image Song is named "To Be Loved".
  • The Hiyoku Renri no Darling spin-off further explores this aspect of her life, where many characters, Mr. Braun among them, notes how she seems much happier when around Okabe and that no one has ever seen her that chipper before.
• Innocent Fanservice Girl: Moeka, being her socially awkward self, doesn't really get how attractive she is in her lingerie during the Faris/Maho slumber party in 0, and chose the outfit for mobility.
• In-Series Nickname: Okabe calls her "Shining Finger" because of her ridiculously fast typing. Another that's lost in translation is Shiatsu-shi meaning "masseuse", after Okabe jokingly commented on how quick and flexible her slender fingers are. Despite the latter continuing to be used throughout the series, official subtitles have seemingly overridden it with "Shining Finger" wherever relevant.
• Jumped at the Call: Right after a failed suicide attempt, she was contacted to join the Rounders. It gave her life meaning to be in contact with someone that would listen to her like FB.
• Kick the Dog: In chapter 6, after she's revealed to be a Rounder and kills Mayuri on FB's orders. Okabe time leaps to rescue Mayuri from her predestined death and if you have Okabe take a certain path by calling Ruka on his phone to help him find Mayuri, the rounders kidnap Mayuri and take her to France, and then Moeka phones him and sends him a picture of Mayuri now as a jellyman experiment just to rub her death in his face.
• Knight of Cerebus: After FB gives her the word, Moeka will not rest until she has Mayuri dead and the rest captured.
• The Mole: She joins the lab group largely because she's also looking for the IBN 5100 and once she has everything she needs, she leads a team to capture them all apart from Mayuri, who is marked for death instead.
• Ms. Fanservice: Glasses-girl, large breasts, tall and has long legs. Not to forget skintight jumpsuit. Yep.
• New Job as the Plot Demands: As a freelancer, she is often involved in a new gig every time she appears on-screen. While the nature of the jobs may vary, it's usually something that requires either a lot of writing, or a lot of photography, or occasionally both.
• Official Couple: With Okabe, at the end of her route in the Hiyoku Renri no Darling spin-off.
• Perpetual Frowner: Her life is pretty empty, so she always looks essentially expressionless and depressed. When in the lab for the first time she seems intrigued by these people, but since she looks so emotionless it's a little hard to tell.
• Phoneaholic Teenager: An adult example. She's always looking at her cellphone, prefers to communicate through text messages instead of talking and cannot stand to have her phone taken away from her.
• The Quiet One: She hates having to speak, but when using mail she's a real chatterbox to the point where the frequency of her messages really irritates Okabe. She begins talking just a bit more frequently by the time the movie comes around.
• Rapid-Fire Typing: Okabe doesn't call her "Shining Finger" for nothing. Moeka is simply capable of typing and sending longform text messages in the span of a heartbeat, and she does this with a flip phone keypad, which requires repeated taps to cycle through the assigned characters for each key, instead of having a full keyboard on the screen like a smartphone. This becomes a plot point when she changes the contents of her D-Mail so fast that nobody notices]]. Witness for yourself here.
• Shrinking Violet: She's too shy to talk to people directly and tends to be reclusive, which is rather jarring. what with her job as a journalist. At one point, she threatens that she knows Okabe is in the lab and is going to come knock until he comes out, but when she actually gets there (Okabe slept through these messages), she gets too nervous to actually try it since the building is too dark. On a less cute/comical note, her poor ability to interact with others left her feeling isolated and miserable, which made it easy to recruit her into the Rounders and follow any order her superiors gave her.
• "Shut Up" Kiss: Non-romantic example. When Okabe forcefully took her phone away, Moeka caused such a ruckus that he had to pull one on her to make her stop screaming, and to fool the landlady into thinking it was some kind of violent lovemaking instead of a psychotic Villainous Breakdown.
• The Silent Bob: Due to her social anxiety issues, it's incredibly difficult to get any peep out of her at all. She does speak at times, though usually in short, fragmented sentences that don't convey a whole lot in the way of meaning or significance, and even then still at whispering volume. She makes up for this by being frighteningly talkative behind a keyboard, however.
• Spy Catsuit: After she reveals herself to be a Rounder agent.
• Stalker with a Crush: It is hinted that Moeka does have romantic interests in Okabe, though she just chooses not to let it show. Her Delta and Gamma counterparts are much better at displaying their affection towards him than in the original Alpha and Beta world lines.
• Stalker without a Crush: She's almost silent in person, but with a phone in her hands she'll obsessively send gigantic text messages over and over no matter how irritated her subject gets at the attention. While Okabe is the one to get most obviously annoyed and wish that she would quit it, she's actually even worse in relation to her boss, who has gotten quite sick of it but has to keep responding anyway.
• Stealth Hi/Bye: She often gets the drop on Okabe due to her usual lack of presence and non-talkative personality. And she can just as easily leave his company without him even noticing it.
• Subordinate Excuse: She's a Rounder not because she cares about SERN or time travel, but simply so that she can continue to talk to her surrogate mother FB.
• Throw the Dog a Bone: In the Steins;Gate worldline, Suzuha is able to foil SERN's plans in 1975, which means Moeka gets to live a normal life with friends that actually care about her.
• Token Evil Teammate: While not exactly evil by nature, Moeka does work for SERN as a Rounder under FB, who goes around silencing and/or detaining people who know too much, usually the former. That includes those she consider to be her friends.
• Trademark Favorite Food: Beer and assorted cup noodle.
• Undying Loyalty: She places complete faith in her supervisor, FB. She'd do anything for her, though she's too afraid to meet in person or call directly. Not so much with her Gamma counterpart, however, who is much less emotionally-attached to FB, though she still considers them an important part of her life regardless.
• Useless Without Cell Phones: She is very dependent on her cell phone. So much so that she'll have a meltdown if it's taken away from her.
• Villainous Breakdown:
  • Driven to Suicide after FB stops contacting her after she succeeds in her mission and is no longer of any use in the timeline where Ruka undoes the effects of her D-Mail, typing on her cell phone nothing but endless strings of "FB".
  • Has a much more violent one when Okabe manages to get her cellphone away from her, pounding on the door, throwing furniture and shrieking at him to give it back.
• Walking Spoiler: The second half of the story is extremely hard to explain without mentioning her status as M4, The Dragon and The Heavy.
• "Well Done, Daughter!" Girl: Moeka desperately wants the approval of her mother figure FB, who is actually Mr. Braun. The lengths she goes to please "her" include premeditated murder of a friend.
• When She Smiles:
  • The only time she ever visibly smiles is at the very end of her route in the Hiyoku Renri no Darling spin-off, after she and Okabe became an official couple.
  • Maho and Faris' antics during their slumber party in 0 did get a chuckle out of her, though she quickly denies it. Maho and Faris are understandably surprised by the sight, before the latter starts furiously tickling her, thus making her laugh uncontrollably.
• Your Days Are Numbered: Moeka is doomed to die in 2010 within the Alpha Divergence, same as Mayuri. She'll either be executed by SERN to cover up her tracks, commit suicide out of despair at lack of contact from FB or, if Tennouji spares her, some freak event like time-traveling Nae will get her.
• You Have Outlived Your Usefulness: Once she succeeds in her goal of getting SERN the IBN 5100, FB stops responding to her messages. The despair of her sole source of affection cutting her off eventually drives her to suicide.

Urushibara Luka

^{Click to see Zero appearance.}

Voiced by: Yuu Kobayashi (JP), Lindsay Seidel (EN)^{Other Languages}Denisse Leguizamo (LA), Monalisa Capella (BR)

Portrayed by: Rie Ueda (stage)

Luka is Mayuri's classmate, an extremely feminine-looking boy who works at his family's shrine. He seems to worship Okabe, who believes they have a master/disciple relationship. He's very shy and soft spoken and before the story began was too nervous to ask to join the group, so he becomes the sixth member to join after Moeka and Kurisu have already joined. Like Moeka, he's allowed to send a message back to the past because he hopes he can use time travel to make himself be born as a girl. Somehow.

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• A-Cup Angst: He retroactively becomes a girl (don't question it!) but looks identical. Meaning completely flat chest, something she's not proud of.
• Ambiguous Gender Identity: Luka outwardly identifies as male, though with some degree of discomfort, and he wishes he had been born female instead. It's not clear if it's because he's genuinely transgender or because he knows Okabe will never fall in love with another man. A D-mail is sent to somehow turn him female and Luka does seem happier that way. In Luka's ending, she regains memories of when she was male, which causes gender dysphoria. It's unclear whether male Luka had the same dysphoria in the first place.
• Ambiguously Gay: Luka holds overtly-intense romantic feelings for Okabe even before his gender was swapped as a result of a D-Mail.
• Attractive Bent-Gender: He looks too damn good in girl's clothes. When he turns into a girl, he looks exactly the same as he was when he was a guy.
• Babies Ever After: In the worldline where Luka stays a girl, her ending has her and Okabe with a child.
• Because You Were Nice to Me: Like Faris, He likes Okabe because of his kindness and even his Chuunibyou personality which would normally exasperate everyone asides Mayuri and Faris. This becomes the turning point in chapter 8 when he (as a girl) and Okabe goes on a date which ends in awkward failure which follows with her mentioning to Okabe about the incident in May during Golden Week when he walks through Akihabara, otakus were shamelessly taking photos of him without permission which pisses Okabe who was there and stand up for him against them with his mad scientist facade but Luka tells everyone he's a guy which causes them to leave him alone then Okabe mentoring him in the Iaijutsu art to toughen him up which Okabe realizes that was a memory when she was male indicating he remembered it from another worldline. It ends with Mayuri pointing out Okabe isn't being himself which Okabe fulfills it by time-leaping and giving the swordsmanship workout for Luka before sending the D-mail to avert Mayuri's death.
• Blanket Tug O' War: In the bonus episode, Luka appears to be quite the blanket thief.
• Chekhov's Skill: His Seishin Zanma sword style that Okabe constantly has him practicing with Samidare. While it looks silly in present day, combined with an actual katana, it would prove to be an unexpectedly deadly fighting style that he employs in the Bad Future.
• Covert Pervert: Despite appearances and his personality, Luka seems to have certain..."fantasies", about him and Okabe at times. Usually, he would freak out when called upon during these moments, and would vehemently deny ever having such thoughts despite nobody ever mentioning them at all. He's also jealous of the female Labmems who get to see and touch a shirtless Okabe, as well.
• Crotch-Grab Sex Check: He's subjected to this twice by Okabe, once in the original timeline, and once more in the Delta worldline where they are an Official Couple. The first attempt ended horribly due to Luka being female at the time, while the second less so since Okabe found what he's looking for, and is shocked that it's somehow bigger than his. Luka is also weirdly turned on by this, but would rather they do it in private where nobody's looking.
• Died in Your Arms Tonight: In Steins;Gate 0, Future!Luka dies in Okabe's arms, snapping him out of the despair he had been in and making him realize he needs to stop World War III.
• Dragged into Drag: His father and sister make him crossdress on occasion. He has no problems with dressing like a miko, though.
• Dude Looks Like a Lady: Luka is so incredibly pretty and feminine that he's frequently mistaken for a girl. Lampshaded by Okabe when Luka is introduced; he makes a series of flattering descriptive statements, followed by "but he's a dude".
• Effeminate Voice: He's a young boy who has a cute girly face and a feminine voice to match. His voice sounds exactly the same when he uses a D-mail to be born a girl.
• Even the Guys Want Him: Much to Luka's discomfort, there seem to be multiple guys attracted to him even when they know his gender. Daru in particular likes to insert him into yuri fantasies.
• Extreme Doormat: Not normally, though Okabe's treatment of Luka could range from callous to downright mean at times, if his text messages to him are any indication. And at other times, Okabe would make embarrassing requests of him, or rope him into schemes that he'd normally decline, though his opinion of (and feelings for) him wouldn't change.
• Future Badass: In the Bad Future of the Beta timeline, Luka becomes a member of La Résistance.
• Gay Option: He's a feminine-looking boy and one of Okabe's romantic options. However, Luka generally can be with Okabe if he turns into a girl and stays like that at expense of Mayuri. World line 3.667293 (Delta attractor field) is the only known line where Luka becomes a couple with Okabe with no alteration in gender.
• Gender Bender: After sending his D-mail, he becomes a full-fledged female in the following timelines.
• Gender-Blender Name: Luka is a name which is often given to girls, but boys have this name, too. In French though, this would be a male name (Lucas, with a silent s).
• Go Out with a Smile: He passes away happily in Okabe's arms after pulling a Heroic Sacrifice to protect Faris and Mayuri from enemy troops in the Bad Future.
• Heroic Sacrifice: He gets shot and killed by enemy soldiers trying to defend Faris and Mayuri in the Bad Future, and passes away in Okabe's arms. The anime changes this to him drawing enemy attention to himself to allow Faris to retreat.
• Hopeless Suitor: He is like Mayuri in this sense, whether male or female, and is actually aware of his plight.
  • Subverted with his/her ending in the original visual novel, however, where Okabe is actually receptive to a female Luka's advances.
  • Averted in the "Darling of Love" spin-off, however, where the "original" Luka actually is revealed to be an option in a Delta world line.
• If It's You, It's Okay: Luka is more than willing to take part in normally embarrassing or questionable activities as long as it pleases "Kyouma-san".
• Incompatible Orientation: In regards to all but one currently known timeline where Luka isn't female by birth.
• In-Series Nickname: "Lukako", used by Okabe.
• Instant Web Hit: According to the Visual Novel, pictures of Luka in cosplay got leaked on the internet while Okabe was in the hospital for his stab wound, and he's now regarded as one of the internet's most popular "Traps".
• I Want My Beloved to Be Happy:
  • As a girl, Luka chose to sacrifice her femininity and chance of finally being with Okabe in order to save Mayuri's life. In the ending that the D-Mail wasn't reverted, she'd still want to fulfill Mayuri's desire for them to cosplay together, in order to make her final day alive a happy one.
  • Despite his feelings for Okabe and often becoming visibly jealous at the prospect of the former getting into a relationship, Luka wholeheartedly supports Mayuri's pursuit of him in the Hiyoku Renri no Darling spin-off. While he admits to feeling a bit jealous of their romance, it's the fact that both of the people he cared about the most finally found happiness that's more important to him.
• Katanas Are Just Better: His weapon of choice in the Bad Future is one. All that training with Samidare really helped, no doubt.
• Let Them Die Happy: In Luka's ending she gets to be the only person not named Okabe or Nae to use the time leap and make sure to use it to have Mayuri's last day be a happy one rather than what would normally have happened.
• Limited Wardrobe: Resoundingly averted, strangely enough. In a game where most characters have one to two choices of outfits at best, Luka alone has four^note His Miko garb, his casual clothing, the "cosplay" dress Mayuri made for him, and the sundress he wears on a date with Okabe (six if counting the Hiyoku Renri no Darling spin-off), two of which he consistently wears in rotation, unlike the other Labmems who only change when the occasion arises.
• Living Emotional Crutch: In the world line of Steins:Gate 0, Luka is troubled with feelings of worthlessness at being Locked Out of the Loop in regards to the secret (involvement/knowledge of time-travel) that the lab members seem to be keeping, but in response to voicing this frustration, Suzuha bluntly states that Luka has unknowingly become this trope to Okabe for being the only person he has managed to remove from that secret.
• Long-Haired Pretty Boy: His future self of the Beta timeline has very long hair kept in a ponytail and he's as pretty as he's always been.
• Miko: Despite being male, Luka seems to work as the shrine miko anyway, which doesn't help when it comes to being recognized as male.
• Miles to Go Before I Sleep: In the anime adaptation of 0, an older Luka elected to stay behind and buy time for Faris to escape from enemy troops. When Faris is afraid that Luka would die, he reassures her that he would not, not before he could meet Okabe again. True to his words, he manages to cling on until Okabe arrived, but expires shortly after they are reunited.
• Nice Guy: Very kind, polite, helpful, shy and grateful to everyone.
• Official Couple: With Okabe, at the end of his/her route, should Okabe decide not to send the D-Mail to save Mayuri's life.
• One-Man Army: In the Beta Bad Future, Luka is capable of fighting off a small army by himself, armed with only a sword and pistol, although he doesn't survive.
• One of the Girls: Due to his overt femininity, Luka gets along much better with girls than other boys, as evident by his more natural interactions with the female Labmems. He also hangs out exclusively with girls at his school, Mayuri being one of them, because being around other boys while looking like that invites a lot of teasing which makes him uncomfortable. Reaches a logical conclusion in episode 25 of the anime adaptation where he is assigned the same hotel room as Mayuri instead of the guys.
• Out of Focus: In Zero. Though he still appears and offers his support to Okabe (even giving Kagari a home in some routes), he has little character drive and is unaware of time travel for the most part, unlike Faris whose wealth and connections make her a far more invaluable ally and give her a more prominent role in Zero.
• Phrase Catcher: Whenever Luka is being cute, Okabe will often say "But he's a dude".
• Prone to Tears: Luka has a very soft personality and is easily upset, frequently leaving him looking on the verge of tears.
• Reluctant Fanservice Guy: Mayuri likes to dress him up in cute clothes, to his great embarrassment.
• Rescue Romance: Luka fell for Okabe because he rescued him from a group of camera-wielding otaku.
• Running Gag: At least once per game, there would always be a scene where Okabe comments in detail about Luka's Yamato Nadeshiko nature, interspersed with several periodic dramatic smash zooms into his face while Okabe exclaims:
  Okabe: But he's a guy!
• Shrinking Violet: He's very shy and quiet, so Okabe seems to have taken it upon himself to give him manliness lessons by practice swinging a fake sword.
• Single-Target Sexuality: When a female, Luka recounts their first meeting to Okabe and confesses that it was Love at First Sight. However, what she is remembering is how they first met when Luka was a guy, but in miko attire, and Okabe was completely unconcerned and accepting of that. Okabe realizes that Luka's feeling are probably still the same when she's turned back into a guy, but is unable to answer them.
• Spell My Name With An S: Word of God has confirmed that his name is spelled "Luka", the characters simply pronounce it with an R because of their Japanese accents.
  • It gets confusing, however, as "Ruka" is still very widely-used in various promotional materials released prior to the (relatively recent) confirmation, his character pages on an overwhelmingly large number of anime databases still go by the old name, and the official English translation of the anime by Funimation still list him as such in the subtitles and credits. Really, the only places where it is consistently spelled with an "L" are in the new English releases of the original games, Elite, and 0.
  • Furthermore, most of the fanbase just spells it like that as well, since they're more used to it.
• Stupid Sexy Flanders: Okabe has to constantly remind himself that no matter how cute and feminine Luka is, he's still a dude and Okabe isn't into that.
• Took a Level in Badass: As he matured in the Bad Future, Luka eventually grew out of his Shrinking Violet nature and adopted a much more stoic and brave demeanor, fighting with extreme ferocity and lethality with a katana, and would not hesitate to put his life on the line to defend his friends.
• Unsettling Gender-Reveal: Everybody who sees Luka assumes he's a girl. Kurisu is particularly shocked to learn the truth. When Luka is retroactively turned into a girl, the one in for a surprise is Okabe, who has grown used to thinking of Luka as a guy and tries to grope her to prove it. Doesn't work out as intended.
• Wholesome Crossdresser: He's seen wearing a shrine maiden outfit fairly often. Mayuri wants to make him wear female cosplay clothing as well.
• Yamato Nadeshiko: A Rare Male Example. Luka is very feminine, supporting and domestic Japanese boy.
• You Shall Not Pass!: In the Bad Future of Steins;Gate 0, Luka dies helping most of Valkyrie's leadership escape an enemy ambush.

Faris Nyannyan/Akiha Rumiho

^{Click to see Zero appearance.}

Voiced by: Halko Momoi (JP), Jad Saxton (EN)^{Other Languages}Rose Mendoza (LA), Andressa Bodê (BR)

Portrayed by: Manami Ikura (stage)

Faris is Mayuri's coworker at the May Queen Cafe as well as the owner. She's able to keep up with Okabe's fantasies because she seems to be living in one of her own. She always wears a pair of cat ears and does the typical 'nya' verbal tic even off duty. Likes to play with Okabe, but he finds her kind of annoying since she's better at making up weird melodramatic stories. She's secretly quite wealthy and becomes the seventh member to join the lab group. She keeps the content of her mail a secret.

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• Animal-Eared Headband: She always wears a cat ear headband, even when she's at home relaxing. When she does take them off, however, it's serious business. She's only seen without them once during a moment when she wants to speak to Okabe as Akiha Rumiho rather than talk to Kyouma as Faris Nyannyan.
• Beat Them at Their Own Game: Her Chuunibyou game is on a whole other level compared to Okabe, thus frustrating him to no end because he couldn't out-do her in their wacky conversations.
• Because You Were Nice to Me: In chapter 7, when Okabe helps her win the Rainet tournament against 4C because of the latter cheating and taking the beating from his gangs for her wellbeing. She opens up to him by confiding her real name to him as a sign of trust then telling him about her previous memories of opening May Queen Nyan Nyan cafe after her father died in the plane crash which was averted thanks to the D-mail she sent but because of the Butterfly Effect, Mayuri's destined to die no matter what in the Alpha worldline and the solution is to undo the D-mail which she tearfully agrees to, if it means saving Mayuri on Okabe's behalf.
• Bubbly Waitress: The cheerful and cutesy Faris is 17 years old, yet owns a Cosplay Café where she dresses as a Cat Girl Meido and works as a waitress.
• Calvin Ball: Although not a game, any extended conversation she has with Okabe becomes very much this.
• Cloud Cuckoolander: She has an irritating tendency (to Okabe, at least) of being able to play right along with his delusions since she's every bit the space case that he is. It leads him to feel that he cannot beat her.
• Color Failure: In the special episode of 0. After the spectacular disaster that was the girls' attempt at making Valentine's Day chocolate leading to her kitchen being thoroughly destroyed, what little strength Faris has left is drained out of her after helping them fix everything.
• Cosplay Otaku Girl: She loves dressing up as a cat eared meido despite being rather wealthy. The ears in particular almost never come off.
• Crocodile Tears: When Okabe is understandably doubtful about her honesty regarding the need to use time travel to win a Rainet match to improve her memory, she makes him go along with her by pretending to cry.
• Curtains Match the Windows: Pink hair and pink eyes.
• The Cutie: She has an extremely cutesy attitude. It's something of a stage persona at times, but mostly just something she enjoys doing.
• Daddy's Girl: In the timelines where her father is alive, they have a very close relationship and she adores him. She's clearly very affected by having to revert the timeline.
• Disappeared Dad: Her father died when she was little, but he's alive in the timelines after she sent her D-mail.
• Ditzy Genius: Despite her foolish looks, she actually has a very insightful and intelligent mind. She runs a restaurant, works as the Akiha family head, oversees the redevelopment project for Akihabara, is a solid tactician and she shows both interest and a good understanding of time travel, though mostly regarding Okabe's misconception about there being a universal 'present.'
• I Lied: After successfully using a D-mail to go back and win a tournament, Okabe asks her to fulfill her end of the bargain and tell him how to undo her D-mail, after which she admits that her future self had probably just lied since she wanted to win really badly. She wasn't lying. She ends up remembering later and really crying.
• Improbable Age: Believe it or not, 17-year-old Faris owns Akihabara, and is responsible for making Akihabara into moe town. In the altered timeline with her father still alive, she didn't have the influence or desire to make it into a moe town, so there's no anime stuff anywhere to be found.
• I Wished You Were Dead: The last time she saw her father before he died she yelled at him to die for going on business trip instead of spending time with her.
• Large Ham: In a similar fashion as Okabe's Hououin Kyouma persona, Faris enjoys her theatrics.
• Living Lie Detector: By looking at people, she can tell how honest they're being to a rather precise level. Her description of it sounds like a rather advanced Cold Reading.
• Love Confession: If you skip the D mail that gets you into chapter 8, you end up at the Faris ending where she confesses before Okabe even sends back the mail. He tries to ignore her confession. In a rare moment of honesty, she sighs and admits it's a bit tiresome that he always evades her like this.
• Ms. Imagination: Like Okabe, she seems to love holding onto delusions. For her, she styles herself as the great Faris Nyannyan, a cat girl meido. Much to Okabe's irritation, she's better at it than he is: she's pretty quick witted and can just absorb all of his posturing into her own scenario.
• My Greatest Failure: The last time she saw her dad, she got in a fight with him and told him she wished he was dead, believing that he cared about his job more than her. She hasn't been able to live it down.
• My Greatest Second Chance: Her D-mail gave her a chance to bring back her father, but it necessitated sacrificing Mayuri.
• The Nicknamer: She has a habit of fashioning nicknames for her friends by attaching an approximation of their given names to a "-nyan" suffix, regardless of whether they like it or not. Except for Okabe, of course, for obvious reasons.
• Ojou: She's extremely wealthy and has quite the lifestyle, though she keeps this hidden from most people.
• Ojou Ringlets: Downplayed. While she doesn't have them in the traditional sense, her pigtails are styled in such a way that they might as well be these.
• Only Known by Their Nickname: She's mainly known by the name she uses at the maid cafe. Almost nobody knows her real name is Akiha Rumiho.
• Parting-Words Regret: The last thing she said to her father before he took off for a business trip instead of spending time with her was her yelling that she hated him.
• Playful Cat Smile: Her default expression is a playful smile.
• Rescue Romance: After he protects her from a rival gang of RaiNet players, she starts to call Okabe her prince.
• Ripple-Effect-Proof Memory: While not as strong as Okabe's, her ability to remember across worldlines is second only to his. It doesn't take much more prodding than simply visiting the location of her cafe for her to remember her entire life in the original line. Her ability is in fact so powerful that it's given its own moniker, "Chesire Break."
• Rose-Haired Sweetie: Her energetic, playful attitude and pink hair matching is quite possibly not a coincidence at all: As much as she loves anime culture and considering the otherwise natural-ish hair colors, it could be dyed.
• Secretly Wealthy: Much to Okabe's (and everyone else's) surprise, she basically owns Akihabara. After the fact was made known, her last name starts making sense...
• Spell My Name With An S: "Faris" is apparently the official spelling, but "Feiris" and "Feyris" also see heavy use.
• Triple Shifter: High school student, Maid Cafe owner and waitress, local RaiNet champion, and land baron of all of Akihabara.
• Verbal Tic: She even ends her sentences with "-nya."

Amane Suzuha

Voiced by: Yukari Tamura (JP), Cherami Leigh (EN)^{Other Languages}Monserrat Pérez (LA), Thaís Lucena (BR)

Portrayed by: Minami Tsukui (stage)

Amane is a teenage girl who works at Mr. Braun's shop. She likes to ride her bicycle and gets along very well with his daughter Nae. She's very physically fit and a friendly person, but her rather strange vocabulary can be difficult to deal with. She has an instant antipathy towards Kurisu, but is still the eighth and final member to join the lab. She doesn't send a message to the past, but Okabe sends one on her behalf.

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• Action Girl: She is a time-traveling, rebel fighter, time-hopping to the past to save us from her crappy future. She doesn't reveal her fighting capabilities until the Rounders make their move.
• Alternate Self:
  • The Suzuha that appears in the finale is different from the one that appeared earlier in the series. Steins:Gate 0 focuses on the second Suzuha.
  • A third Suzuha appears in the movie, coming from the Steins;Gate timeline.
  • The Hiyoku Renri no Darling spin-off introduces a fourth that doesn't come from a Bad Future, who traveled to the past to collect obsolete technology, and witness her parent's first time meeting while she's at it.
  • Yet another one appears in Linear Bounded Phenogram from the Delta timeline where she's working as a catgirl maid and has the most normal life out of all of the various versions of her.
• Back for the Finale: She largely exits the plot when she goes back in time to get the IBN 5100, but returns at the end as a different alternate future self than the one Okabe knows and is here to prevent World War III.
• Been There, Shaped History: A quite weird and literal case. Suzuha was able to influence the course of the series in multiple ways.
  • The first is by posting on the internet under the John Titor alias in 2000, therefore giving Okabe an idea of what he's getting into in 2010.
  • The second way is more impactful than the first, but also a lot more of a downer, where another version of herself finds the IBN 5100 in 1975 but becomes stranded there due to the time machine breaking down. As she grew older, Suzuha met and became a positive influence in the life of a young Tennouji Yuugo, and introduced the man to his future wife and changed his life for the better, despite the latter's murder at the hands of SERN. She was also acquainted with a younger Makise Shouichi and Akiha Yukitaka, and entrusted the IBN to the latter, who eventually donated it to the Urushibara family's shrine.
• Boyish Short Hair: Her hairstyle consists of short hair and two Braids of Action on either side of the head. She's also a physically fit self-proclaimed warrior.
• Brick Joke: In the movie, she has Daru's hat.
• Companion Cube: She's very attached to her bike. It becomes something of a memento after she goes back in time.
• Cross Player: She goes by John Titor on @channel.
• Driven to Suicide: In one timeline, her older self committed suicide after having failed to complete her mission. In others, she passes away due to illness.
• Exact Eavesdropping: Thanks to the windows being left open and Okabe's excessive volume Suzuha overhears a lot of what they're working on. Though you could also read her hesitation before giving this answer as her just making an excuse. After all, she doesn't have to overhear anything, she already knows that Okabe becomes a terrorist opposing SERN.
• Extreme Omnivore: She mails Okabe to ask if there's anywhere to find bugs or weeds to eat.
• Fish out of Temporal Water: She takes Okabe's Kyouma persona at face value, refers to herself as a warrior and occasionally drifts into some rather odd word choices that take Okabe a few moments to puzzle out. She's from a future where she constantly fights and only knows Okabe as a deceased revolutionary leader who helped invent time travel devices, so from her perspective everything he says sounds about right, if perhaps a little dramatic.
• Full-Frontal Assault: She has a few moments of this during 0, where she runs into a mysterious figure rummaging through the lab just as she exits the shower.
• Full-Name Basis: Has a huge habit of addressing everyone by their full name even her close friends. This changes once her true identity becomes known to the lab.
• Get a Hold of Yourself, Woman!: In The Movie, she gives Kurisu a slap to push her into admitting she doesn't want to give up on saving Okabe from being erased from the Steins Gate timeline.
• Girls with Guns: Beta!Suzuha.
• Hate at First Sight: Right from the moment she first sees Kurisu, Suzuha takes a great dislike towards her and acts very wary around her, to Kurisu's great confusion and discomfort. Suzuha later reveals that in the future she comes from, Kurisu worked for SERN and was the one who completed the time machine. Still, after spending some time with the others, she realizes that Kurisu's reasons were likely not a mere lack of morals or conscience, and figures she might have been captured and forced into it.
• Improbable Age: She's only eighteen, but considers herself a warrior and is a veteran terrorist used to fighting SERN. She even alludes to having been captured and tortured once.
• In-Series Nickname: Okabe calls her "Part-Time Warrior".
• I Will Find You: Part of the reason she's in the present is to find her father. Mayuri is the one to figure it out: Her father is Daru, who is kind of baffled but tries to act appropriately.
• I Work Alone: Suzuha dislikes asking others for help, and will not reveal her own problems to anyone unless absolutely necessary. Even then she'd prefer to go at it alone instead of dragging anyone else in with her, unless it's vital to her mission as a whole.
• Jerkass to One: In the original visual novel and anime adaptation, she starts out friendly and chipper to everyone, but is intensely hostile towards Kurisu until several chapters later, due to the latter's contribution to SERN's time machine research in her timeline. In fact, just mentioning Kurisu by name is enough to make her absolutely leery.
• Kid from the Future: She's Daru's daughter from the future. When he asks her who is her mother, she decides to keep it a secret.
• Leg Focus: Okabe can't help but sneak glances at her legs.
• Little Miss Badass: She's very physically fit and calls herself a warrior, which Okabe refines to Part-Time Warrior. When Moeka attacks on the 13th, Suzuha is the only reason they make it out okay when she charges in and attacks the SERN operatives all by herself.
• Madness Mantra: Though more of a Grief Mantra, once she recovers her memories that her malfunctioning time machine had erased, she realizes it's far too late for her to be able to complete her mission of acquiring an IBN 5100 for the group. She writes a letter of apology that begins with her repeating "I failed" over and over again.
• Ms. Exposition: Due to being from the future, she has a tendency of explaining the background science and future events to the rest of the cast.
• New Job as the Plot Demands: Whenever she's not working at the Braun Tube Workshop, Suzuha would take on various odd jobs to earn more money. In fact, she's held enough jobs to give Moeka herself a run for her money, having worked as a nightwatcher and a festival stall clerk to name a few.
• Nice Girl: Besides her antipathy for Kurisu, she's a very kind and friendly individual.
• Nom de Mom: She uses her mother's maiden name. Though after traveling back to 1975, she starts using her father's last name Hashida instead.
• Only Sane Woman: Suzuha is generally the voice of reason across all timelines.
• Relatively Flimsy Excuse: In 0, Beta Suzuha pretends to be Daru's sister while living with him.
• Rewatch Bonus: While all of her eccentricities could be rationalized as her just having grown up sheltered, upon a second viewing it becomes almost blatantly obvious that she's from the future what with her outdated slang, happening to know the exact right things to say or do to help steer the main characters in the right direction, and her associating helicopters with air raids.
• Stepford Smiler: She's genuinely pretty cheerful, but she's also hiding trauma and anxiety regarding La Résistance and never knowing her family.
• Tomboy and Girly Girl: The tomboy to Mayuri's girly girl.
• Totally Radical: In-universe. She uses "Oha!" as a greeting, which has been long outdated in Japan since 2000. It's about as awkward as using "Wazzaaaaap!" in this day and age, which appropriately is what she uses in the English script.
• Tragic Keepsake: A small, gold pin that belonged to her father. In the epilogue, Okabe copies the design to make eight badges, one for each member of the group.
• The Ugly Guy's Hot Daughter: Her father turns out to be the fat otaku Daru. She surely got her looks from her mother.
• You Killed My Father: Kayano killed her mother, in addition to her fellow resistance members.
• Your Days Are Numbered: Like several other characters, the day she will die is set in stone, but it's a little odd in her case. She'll travel back in time and then live until around the year 2000, at which point she'll commit suicide or die from an illness (specifically, her organs get turned to jelly).

Other Characters

Tennouji Yuugo/Mr. Braun

Voiced by: Masaki Terasoma (JP), Christopher Sabat (EN)^{Other Languages}Mauricio Vázquez (LA), Rodrigo Martim (BR)

Portrayed by: Teruaki Ogawa (stage)

A CRT-TV store owner, and Okabe's landlord. Though a large, imposing man, Yuugo is a doting father towards Nae and wishes to shield her from Okabe's... eccentric activities. He is referred to as Mr. Braun due to his love of braun tubes. Though gruff, he rather likes Okabe.

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• Adaptational Villainy: A minor example. Unlike in the visual novel, in the anime he doesn't try to protect Moeka from the fallout. He kills her himself before committing suicide.
• Affably Evil: Despite being the Big Bad, he genuinely cares about his subordinates, and loves his daughter and late wife.
• Bald Head of Toughness: The physically strongest character in the series and the only fully bald one. He is so intimidating to Okabe, his tenant, that the latter will try to get on his good graces whenever he seems to have made him mad for fear of a beatdown and/or eviction. He also turns out to be the Big Bad as the ruthless leader of a secret group of Private Military Contractors, crossing over with Bald of Evil. Notably, in the prequel Brownian Motion of Love and Hate, he still has his hair and is much more average—it's only after he is forced into working under SERN that he gets his bald, buff look.
• Better to Die than Be Killed: In some of the later worldlines explored, SERN will dispose of him because his group successfully discovered an IBN 5100, but he chooses to hide Moeka's involvement and then commit suicide.
• Big Bad: Of the Alpha timeline chapters/episodes. For most of the series, he, as FB, is the one antagonizing Okabe and the Lab Members, as the leader of the Rounders who are after them. By extension, he is also this in Linear Bounded Phenogram, as the various conflicts in each chapter can all be traced back to him in some way.
• Boyfriend-Blocking Dad: Braun forbids Okabe from talking to, being alone with, or standing in close proximity to his daughter, either to keep her away from his experiments or... other reasons.
• Broken Pedestal: To Moeka once she finds out FB lied to her and was only using her until she got the IBN 5100.
• Bruiser with a Soft Center: He's big, irritable and threatens Okabe frequently, but he cherishes his daughter and actually likes Okabe.
• Contrasting Sequel Antagonist: Chaos;Head's main antagonist Norose Genichi was a powerful CEO who rebelled against the Committee of 300 and created a Lotus-Eater Machine that would've freed the world from suffering and strife, but also willingly killed hundreds of innocent people and mentally scarred many people to achieve this. Yuugo is a local leader of a squad of Private Military Contractors who is Affably Evil, genuinely cares about his daughter, does not cause nearly as much death and destruction, freely admits he is just a low-level cog in the machine, and is generally an Anti-Villain.
• Covert Pervert: When Suzuha distracts him with her 'seduction' technique by taking off her jacket and attacking his face with it, Okabe turns on the 42 inch TV so the lab can use the Microwave Ophone. When he reenters a moment later, he expects to be punished severely... but Mr. Braun thought it was pretty kinky and doesn't mind at all.
• Cranky Landlord: With Okabe for a tenant, it's forgivable, but he tends to threaten to hit Okabe or raise his rent frequently.
• Dark and Troubled Past: In his youth, he was homeless and lived a miserable life, though a kind and reclusive woman named Suzu helped him out and earned his complete and unshakable gratitude. When SERN offered him a job as a hitman "Rounder," it turned his life around, but came at the cost of his freedom. In his expanded backstory, Braunian Motion of Love and Hate it gets worse when SERN discovered his betrayal to save Suzu out of gratitude and genuine friendship after they told him as a Rounder to eliminate her and punished him by having either his wife, Tsuzuri or daughter, Nae be taken away to France to become Jellyman experiments subjects which Tsuzuri complied to do it for Yuugo and Nae's wellbeing which is fulfilled and horrifically traumatized him when his Rounder superior showed her corpse to him as an example which worsened as Tsuzuri was pregnant with their second child at that time.
• Disco Dan: He's a huge fan of CRTs even when HDTVs are commonplace at this point.
• The Dog Was the Mastermind: FB is none other than Mister Braun, the goofy landlord who mostly seemed to be a side character.
• Doting Parent: His daughter means the world to him. He's also this to Moeka in the spin-off.
• The Dreaded: Okabe fears him immensely, both because of his frequent threats to raise the (implied to already be high) rent, as well as the possibility of a good old physical beatdown. He fears him even more upon finding out that he is FB, the ruthless Rounder leader and Big Bad; it takes him all his energy to confront him in the sequel without running away.
• Even Evil Has Loved Ones: Despite being the leader of a team of mercenaries, he loves both his daughter and his late wife and is driven to protect the former.
• Ex-Big Bad: In Steins;Gate 0, he no longer has any reason to oppose Okabe, even offering his services in one route.
• Genius Bruiser: His physical strength is emphasized in his civilian identity, but as FB, he demonstrates himself to be a very effective manipulator, able to rope Moeka and others into becoming his lackeys while staying Beneath Suspicion. He also pulls off plans like creating a super-complex delivery route for the IBM 5100 computer where the delivery men take public transportation and hand it off to each other repeatedly, and setting up a remote scalping operation to pay off his superiors.
• Hijacked by Ganon: In the first chapter of Linear Bounded Phenogram, the antagonist initially seems to be 4℃/Shido, who is preventing Okabe from buying the game Nae wants. However, Shido is actually working for Mister Braun, who is trying to pay off his debts to his superiors in the Rounders.
• I Did What I Had to Do: He admits that working for SERN is repugnant, but when you're so poor that you're reduced to literally eating from the garbage to survive, you become willing to put your morals aside out of desparation.
• In-Series Nickname: Okabe calls him "Mr. Braun", due to his obsession with traditional televisions with CRT displays, also known as "Braun tubes".
• Jerk with a Heart of Gold: Even though Okabe gets on his nerves, he actually likes him. Subverted at the end of chapter 9 when he admits to Okabe and Moeka he's FB, Moeka's Rounder superior, he brandishes a gun in an attempt to silence them to protect his secret identity however it's Double Subverted when Okabe brings up Suzu to him in anger of dishonoring her memory which Tennouji realizes his wrongs as Okabe reveals that Suzu is the same Suzuha Amane after she time-traveled to the past who hates SERN for creating the Bad Future she was born in, in remorse, he atones for it by shooting his head off literally ending his life.
• Kick The Son Of A Bitch: In the visual novel, while he did try to save Moeka's life by severing contact, he makes no effort to hide his personal disdain for her when they meet in person, irritatingly calling her insane for her excessive texting. In the anime, his enmity towards her is Adapted Out for cold professionalism.
• Knight Templar Parent: To protect his daughter, he became SERN's subordinate.
• Living Emotional Crutch: Moeka is completely dependent on FB, as he functions as a Parental Substitute for a woman who who was on the verge of suicide due to her isolation.
• Love Makes You Evil: His love for both his wife and daughter is what turned him into FB. After SERN killed his wife in one of their experiments, he was willing to do anything they asked to protect his daughter from the same fate.
• The Man Behind the Man: FB is Moeka's supervisor, though the two haven't met face to face since such things are discouraged. This is the closest we get to the true face of SERN.
• Manipulative Bastard: FB controls at least some subordinates by reaching out to them at their lowest moments and recruiting them into SERN, leaving them almost fanatically loyal. However, he actually does care about Moeka, even if he finds her annoying.
• My God, What Have I Done?: Implied when he discovered Suzu, the woman who gave him a home and took care of him, was actually Suzuha, who despised SERN. His last words are apologizing to her before killing himself.
• Parental Substitute: Moeka views FB as her surrogate mother, even though they have never met in person and only communicate through text messages.
• Pet the Dog: Despite prior claims, in the visual novel he does care about Moeka and tries to orchestrate her survival. Averted in the anime, where he kills her personally before committing suicide.
• Punch-Clock Villain: FB takes time to console neurotic employees, no matter how annoying they may be. The villainy isn't really by choice, either, but is simply done so that he can actually provide for his daughter. He didn't want to actually find the computer SERN was looking for.
• Punny Name: His nickname, Mr. Braun, besides being a reference to Ferdinand Braun, is also a joke about how brawny he is.
• Samus Is a Girl: Inverted. The motherly figure who became Moeka's Living Emotional Crutch and manipulated her into doing SERN's bidding was none other than this man.
• Sherlock Scan: Demonstrated during Moeka's route in the Hiyoku Renri no Darling spin-off, where he's able to detect Okabe's presence in the former's room just by smelling the air and noticing cup noodle servings for two in the trash. Of course, he only said that to make an antsy Okabe spill his guts himself.
• Shipper on Deck: He's this in the aforementioned spin-off. Once he's caught wind of Moeka's attraction towards Okabe in her route, he went out of his way to ensure they could have an enjoyable time with each other.
• Silent Scapegoat: In Mayuri and Kurisu's ending, he vilifies himself in front of Moeka to drive her away from him and takes credit (an act that will get him killed by SERN) in order to keep her safe. It doesn't work, though, because either she commits suicide when cut off from him or because a time displaced Nae murders her. When the world wants you dead, it'll jump through whatever hoops it has to.
• Stepford Smiler: He may be jovial on the outside, but having to be a cold-blooded killer and manipulator is getting to him.
• Walking Spoiler: Being that he is revealed as the Big Bad rather than the side-character he seemed to be.
• You Have Outlived Your Usefulness: In the anime, he shoots Moeka in the chest after she and Okabe track him down.

Tennouji Nae

^{Click to see Zero appearance.}

Voiced by: Ayano Yamamoto (JP), Brina Palencia (EN)^{Other Languages}Andrea Ascencio (LA), Hannah Kupper (BR)

Yuugo's daughter who is good friends with Mayuri. She appears to be slightly afraid of both Okabe and Daru, but gets along well with everyone else.

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• Accidental Murder: In one world line, Nae accidentally kills Mayuri when she attempts to hug Mayuri after catching up to her on the subway platform, pushing Mayuri in front of a speeding train and killing her.
• Break the Cutie:
  • In one world line, she's accidentally but directly responsible for one of Mayuri's most gruesome deaths. Her expression afterwards sells it.
  • Not to mention the one where she witnesses her father's suicide and her future self time leaps back to kill Moeka in revenge.
• Cheerful Child: Nae represents raw innocence, the most important part of humanity. Something to be protected.
• Children Are Innocent: She's very sweet and friendly, though shy around Okabe due to his loud behavior. However, in an alternate timeline, her father commits suicide and Nae swears bloody vengeance against Okabe. She then time jumps back inch by inch and sends herself even crazier before ending up back in her child's body.
• The Cutie: It is through their interactions with playful, sweet, innocent Nae that many of the characters reveal their soft sides.
• Daddy's Girl: She and her father are very close and she means the world to him.
• Demoted to Extra: She briefly plays a fairly large supporting role near the end, but this is excluded from the anime.
• Drill Sergeant Nasty: Her "Sergeant Clean" persona when directing everyone to help clean Faris's condo in Zero. As Mayuri explains, the bigger the mess, the stronger her powers.
• Girlish Pigtails: She wears her hair in a cute pair of twintails, emphasizing her childish and innocent nature.
• Living Emotional Crutch: Mr. Braun has stated several times she is everything to him. It is implied he would have committed suicide long ago if not for his daughter.
• Missing Mom: It's revealed in Mr. Braun's expanded backstory, Braunian Motion of Love and Hate that the reason Nae's mother is missing is because SERN discovered Braun's betrayal to save Suzu out of gratitude and genuine friendship after they told him as a Rounder to eliminate her. They punished him by having either his wife, Tsuzuri or daughter, Nae be taken away to France to become Jellyman experiments subjects which Tsuzuri complied to do it for Yuugo and Nae's wellbeing.
• Morality Pet: She keeps her father's anger in check anytime Okabe gets on his nerves.
• Purity Personified: Courtesy of her dad Mr. Braun, Nae is well kept from the ugliness and idiocy of the world.
• Revenge Before Reason: In her evil alternate future, an adult Nae kills Okabe, then goes back in time to kill Moeka before slashing Okabe's arm and warning him of what his future holds for him.
• She's All Grown Up: Appears in Robotics;Notes, which takes place 9 years later.
• Strong Family Resemblance: Her grown-up self is a spitting image of her late mother Tsuzuri, complete with ponytail.

John Titor

Voiced By: Hiroshi Tsuchida (JP), Patrick Seitz (EN)^{Other Languages}Benjamín Flores (LA)

A mysterious poster who appeared on @chan. While he says the same things as the John Titor in the real world, nobody remembers the first appearance of Titor and he claims himself that he has not been to the year 2000, though he may go in the future. He's an early source for information, though Okabe is understandably leery about trusting him.

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• Beethoven Was an Alien Spy: John Titor wasn't a troll in the year 2000, nor is he in the present. Bonafide time traveler.
• Cast as a Mask: He's voiced by a man in both Japanese and English to disguise his true identity as Suzuha.
• Character Name Alias: Name is based off a revolutionary/terrorist hero from the future, though Titor himself doesn't realize where the name comes from.
• Fish out of Temporal Water: Titor doesn't really get internet lingo, nor a lot of informal speech. He even fails to realize when people are making fun of him.
• Historical Badass Upgrade: From anonymous forum troll to genuine time-traveling warrior for La Résistance.
• Historical Domain Character: In as much as "that one forum poster who became an internet meme" counts as a historical figure.
• You Have to Believe Me!: Averted. Though worried about the future dystopia brought on by SERN, he says he doesn't really care if anyone believes him or not. He never gets excited or overly defensive, leaving his excitement at finding someone who remembers alternate timelines his only real emotional reaction.

FB

FB is the operative in charge of local SERN's rounders in the area. A mysterious character for most of the story, who communicates only by cell phone texts. See Yuugo Tennouji/Mister Braun for more details.

Doctor Nakabachi

Voiced by: Mitsuru Ogata (JP), Kent Williams (EN)^{Other Languages}Bernardo Rodríguez (LA)

Doctor Nakabachi is a crackpot physicist obsessed with time travel. He is not taken seriously in the scientific community. The story begins with Okabe attending his conference simply to make fun of him for attempting to publish internet conspiracy theories about time travel as though they were true. In reality however, he is actually Shouichi Makise, Kurisu's own father.

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• Abusive Dad: He treats his daughter like crap out of envy that she's far more intelligent and talented than him. In the original timeline, his response to her writing a good research to impress him was to steal it from her and beat her up when she tries to stop him. In the Alpha timeline, he is also the one who brainwashed her into becoming a SERN agent and fully buying into their philosophy so she can build them a time machine.
• Adaptational Nice Guy: In-Universe example. He's much less of an asshole and Abusive Dad in the Alpha timeline than in the Beta timeline. It helps that two of his close friends, Yukitaka and Suzu, were positive influences on him and he wants to build the time machine in dedication to them after their deaths.
• Adaptational Sympathy: The manga version of Babel in the Grieved Maze even depicts him as a more tragic figure in his and Kurisu's backstory as it's shown at Yukitaka's funeral which he and Kurisu attended, he broke down in tears over his death. He displayed his Undying Loyalty to Yukitaka and Suzu swearing that he will create the time machine so that he will save them from the fate of death upon them. Kurisu realizes that at that time when Nakabachi got angry at her for pointing out his mistakes in his thesis, he was also crying in grief over two of his close friends death, she notes a "Not So Different" Remark as Okabe desires to rescue his childhood friend, Mayuri who means to him from death.
• Ascended Extra: The Spin-off games and Drama CDs go more in depth into his reasons for becoming obsessed with time travel and why he treats Kurisu the way he does.
• Berserk Button: Two notable ones. The first is when Kurisu calls him out for trying to steal her paper, making him fly into a rage and striking her. The second is when Okabe refers to him as "washed up". During their confrontation, you can see Nakabachi nervous and shaking as he holds the knife, until Okabe throws out the insult, at which point, you actually see him snap as he charges Okabe.
• Big Bad: Of the original timeline (the final two chapters of the visual novel, and last episodes of the anime), as Okabe must save Kurisu from him in order to prevent World War III.
• Broken Pedestal: He's idolized by his daughter Kurisu, who wants to get close to him, but when we see them finally speaking at the end he's a complete ass, blames her for his own failings and loudly announces his intention to steal her work. He's even willing to kill her when she realizes what he's like.
• Chekhov's Gunman: The man appears at the very beginning of the story, and then becomes completely unimportant until the end.
• Driven by Envy: His envy of his daughter, Kurisu has severely unbalanced him to the point where he attempted to kill her in the original world.
• Evil Counterpart: To Mr. Braun. Both are fathers with young daughters that have connections to a terrorist organization. But whereas Braun tried to be a good father for the most part and makes it clear he’s not happy with what he’s done, Nakabachi's an unrepentant scumbag with completely unsympathetic motives in the game proper.
• Greater-Scope Villain: For most of the series. His murder of Kurisu leads to Okabe going to the Alpha timeline and the events of the series, but he himself does not directly antagonize Okabe until Okabe returns to the original timeline. Until then, FB serves as the Big Bad.
• Hate Sink: He's a detestable bastard who thinks he's better than everyone and abuses his daughter just because he's jealous of her intelligence, and is revealed to be the one who brainwashes her into becoming a proud SERN scientist. He basically represents everything wrong with SERN as an organization. Furthermore, because the main Big Bad FB/Yuugo is an Affably Evil Tragic Villain, Nakabachi gives the audience someone to hate. But in the manga version of Babel of the Grieved Maze, he's much more sympathetic as his tragic backstory and his loyalty to Yukitaka and Suzu Hashida are explored.
• Jerkass: He's a complete asshole to his daughter, abusing her for being better than him, and looking down on everyone but himself.
• Laser-Guided Karma: In the True Ending, it seems as though he'll get away with trying to murder his daughter to steal her research, but then a plane fire destroys the stolen research and he began ranting and raving, discrediting him further. What's more, he's under suspicion for stabbing Okabe.
• Miles Gloriosus: He loudly proclaims himself as an amazing scientist when he's actually quite incompetent and no stranger to stealing the work of others, which Okabe calls him out on at the start when he stole research from an image board.
• Never My Fault: Okabe's internal narration calls him out on this.
• Nom de Mom: Inverted. His real name is Shouichi Makise, but he changed his name due to his issues with Kurisu.
• Offing the Offspring: In the original timeline, he tries to kill his own daughter Kurisu to steal her work.
• Parental Neglect: He keeps a distance from his daughter Kurisu, downright refusing to see her.
• Pet the Dog: In the Alpha timeline, he definitely shows he loves Kurisu by preparing a fork as a gift for her 11th birthday. The Drama CDs imply that he treats his daughter terribly because he believes that he can fix their relationship after going back in time once he figures out how to make a time machine.
• Plagiarism in Fiction: Steals the work of John Titor and Kurisu and begins his research with it.
• The Resenter: To his daughter Kurisu, resenting her for being far more intelligent than him and blaming her for his own failings.
• Stealing the Credit: In the original world, he attempted to kill Kurisu and planned to steal her (much better) time travel research to publish it solely under his own name.
• Strange Minds Think Alike: His alias as Dr. Nakabachi was originally just like Okabe's title as Hououin Kyouma; a chunni name he used in meetings with his friends.
• Ungrateful Bastard: In the Beta worldline, when his daughter, Makise Kurisu, seeks him out, tells him about her time-travel research, and openly suggests that they share credit for it, his only response is to throw her offer back in her face and try to steal her research all for himself. Even when Okabe tries to intervene and prevent his attempted murder of her, Kurisu still takes a stab for him which kills her. He then tells Kurisu she got what she deserved and goes ahead with stealing her theory to take all the credit for her genius.

Akiha Yukitaka

Voiced by: Taira Kikumoto (JP), Eric Vale (EN)^{Other Languages}Carlos Gajardo (LA)

The father of Faris NyanNyan/Akiha Rumiho, who passed away years before the start of the series. He was close friends with Dr. Nakabachi in their youths and was entrusted the IBN 5100 to by an elderly Suzuha before donating it to the Urushibara family shrine.

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• Curtains Match the Windows: He has salmon-pink hair and eyes, just like his daughter.
• Disappeared Dad: His absence was commented on by many of the Labmems, who found it strange that Faris never mentioned her dad in detail. It turns out that he had died years prior from a plane crash, and wasn't even around all that much while he was alive, either, due to being buried in his work.
• Foil: To his close friend, Shouichi aka Dr Nakabachi; Shouichi is stated by Kurisu to be an abrasive and uncaring father because his massive pride is wounded by her criticism over his scientific papers during her childhood and was also known to vent his anger on his wife forcing them to leave him behind and moved to America and when she's reunited with him in the Beta worldline, he won't hesitate to murder her to pilfer her time travel thesis to take the credit. Yukitaka on the other hand; while he was never a perfect father for Faris as he's always on working business trips, he's nonetheless a kind, caring, and loving father at best.
• Nice Guy: This guy is not only warm, friendly, compassionate, but he's also patient as seen in Kurisu's route; Vermillion Soteria in the Linear Bounded Phenogram game as she struggles to help Okabe as he had a mental breakdown over Mayuri's death. Wishing to help Okabe, Yukitaka has Kurisu phone her father and also his close friend, Shouichi aka Dr. Nakabachi who's quite arrogant and uncooperative at first but eventually relents to help Kurisu while Yukitaka serves as the mediator to explain Okabe's situation.
• Parents as People: Yukitaka is a loving and doting father for Faris aka Rumiho but he's also a Workaholic who has to go on business trips more often than spending time with her when she was in her childhood. On her eighth birthday, he made a promise to drop out of work to celebrate but goes back on it when he was called back to work, this caused her to resent him by saying she wishes that he was 'dead' which caused him grief when he heard this and took an early flight home on a plane to mend their relationship but ironically caused his death as he was the only victim when the plane crashed. Faris hearing her words came true is in deep grief and spent years running Akihabara in her dad's place and also her May Queen Nyan-Nyan cafe to cope with his death and given the opportunity to send a D-mail to save her father, she does so but in exchange, she causes inadvertently horrific consequences for Okabe with Mayuri's death.

Imamiya Tsuzuri

Tsuzuri and a young Nae

Tsuzuri is Tennouji Yuugo's late wife and mother to his daughter Nae. She first met a younger Yuugo in his early Rounder days when he stopped a thief from running away with her bag and, despite knowing full well the nature of his work, still opened her heart and eventually settled down with him. She was killed by SERN as a punishment for her husband, who went against his orders in order to protect an elderly Suzuha, and was jellified in one of their experiments while pregnant with their second child.

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• Cruel and Unusual Death: She is turned into a jellyman by SERN along with her baby.
• Death by Origin Story: Tsuzuri is long dead by the time of the series, and was the reason why Mr. Braun is so protective of his daughter Nae, since she's his Living Emotional Crutch and the only thing that reminds him of his late wife. And because Okabe seems like a shady person.
• Foil: A very interesting example for Mayuri as they are both kind people who are Living Emotional Crutch for Tennouji and Okabe and don't really deserve to die horrifically. While Mayuri's presented as The Ditz most of the time except for her astounding emotional intelligence, Tsuzuri's an all-around Smart Girl because when Tennouji first met her, she was currently attending an university where Suzu works there as a lecturer.
• Nice Girl: She's very kind, happy and grateful to have Yugo as her faithful husband. Even when SERN revealed to her about his secret career as a Rounder and his mission to have Suzu eliminated, she remained steadfast in her loyalty to him, and even selflessly volunteered to become a test subject to protect Yugo and Nae, even if it means she will die.
• Strong Family Resemblance: Her daughter Nae greatly resembles her, especially during adulthood, as seen in Robotics;Notes.
• Too Good for This Sinful Earth: She shows herself to be a saintly wife and mother. After forcing her to become a scientific guinea pig, SERN tosses her into a black hole, killing her.

Urushibara Eisuke

Voiced by: Mitsuaki Hoshino (JP), Robert McCollum (EN)^{Other Languages}Lenin Venosa (LA)

Eisuke is the head priest of the Yanagibayashi shrine and father of Luka. Together with his son, he plays a side but important role in both the original visual novel and 0, usually as the host or retainer for the current game's MacGuffin.

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• Chuunibyou: He is revealed to be one in his youth as well in the Hiyoku Renri no Darling spin-off, the results of which were several fantasy stories he cooked up while he was young that Luka and Okabe mistake for ancient scrolls. After this revelation, his accepting of Okabe's antics suddenly start making a lot of sense...
• Cool Old Guy: He's a genuinely nice fellow who's more than happy to play along with Okabe's Chuunibyou antics, and is entirely supportive of his son's crossdressing lifestyle, though he's the one who made him do it in the first place. He also has no problems with his son hooking up with another man, as seen during Luka's route in the Hiyoku Renri no Darling spin-off.
• Dirty Old Man: Despite his pleasant attitude, Eisuke is hinted to have quite the dirty mind for a priest, as he was the one who turned Luka into the Wholesome Crossdresser he is today, and is more than happy to buy him feminine clothing and new cameras to take pictures of him for posterity. He's also a veteran ComiMa otaku, having attended and partaken in its "spoils" over a period stretching back decades.
• Doting Parent: Despite Eisuke's usually-mellow personality, Okabe had better not break Luka's heart or else. Even giving so much as a hint of not wanting to date his son is enough for him to become upset and unusually stern. He also purchases new cameras every few years to, as Okabe puts it, "record" his son's growth, whatever that means.
• Nice Guy: He and his family offered an amnesiac Kagari Shiina a place to stay during the course of 0.

4℃/Shido

Voiced by: Minoru Shiraishi (JP), Ian Sinclair (EN)

The leader of the Viral Attackers and a recurring minor antagonist. He uses his gang to win Rai-net games through underhanded means, and terrorizes his opponents. He becomes an enemy of Okabe when the latter helps Fairs challenge him at the Rai-Net tournament. He reappears in Linear Bounded Phenogram as the antagonist of Okabe's chapters.

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• 0% Approval Rating: In the Faris route of My Darling's Embrace, Faris reports that the maids who work under him frequently complain about being forced to wear skimpy clothing and degrade themselves for his profits; this combined with his aggressive takeover of the local entertainment businesses and his arrogant, Chuunibyou personality make him widely disliked throughout Akihabara, and not one of the other cast members hold him in high regard.
• Arch-Enemy: To Faris. In the Rai-Net tournament, he is her eventual opponent and seeks to dethrone her, as she is the defending champion, and in her route of My Darling's Embrace, he does everything in his legal power to drive her maid cafe out of business and force her to sell it to him.
• Arc Villain: He is the antagonist of Chapter 7 in the original VN, as the main opponent of Faris in the Rai-Net Access Battlers tournament, the antagonist of both of Okabe's chapters in Linear Bounded Phenogram, and shows up yet again in both Kurisu and Faris's routes in My Darling's Embrace.
• Big Bad:
  • Of Abduction Across Three Worlds, Linear Bounded Phenogram's tenth chapter, as his theft of Mayuri's pocket watch sets off the chain of events that falsely leads Okabe to think she was kidnapped.
  • In the Faris route of My Darling's Embrace, he is the Corrupt Corporate Executive who tries to drive Faris's maid cafe out of business so he can purchase it for himself.
• Card-Carrying Villain: He refers to himself with many villainous-sounding epithets (like the Duke of Darkness) and takes pride in his thuggish nature.
• The Chosen One: As part of his Chuunibyou persona, he claims to be the chosen one of a deity or divine will called Gaia.
• Chuunibyou: He seems to have a bad case of this himself, having coined incredibly cringe-worthy epithets for himself and his lackeys and favors similarly-colorful terminology when talking (down) to Okabe and co. It gets out of control in the Faris route of My Darling's Embrace; once Moeka arrives with incriminating evidence of his hostile takeover of Akihabara, he undergoes an impressive Villainous Breakdown, complete with Laughing Mad.
• Corrupt Corporate Executive: In the Faris route of My Darling's Embrace, he uses borderline-illegal tactics to become a proprietor of maid cafes and other entertainment stores in Akihabara. Through price wars, threats of violence, and other such means, he is able to buy out almost every single maid cafe in Akihabara, and it is mentioned that he forces his maids to wear Stripperific outfits against their will to draw in more customers. His goal is to buy out the cafe owned by his Arch-Enemy Faris.
• Demoted to Extra: Most of the plotlines involving him in the visual novel are completely omitted in the anime adaptation, and his name is also not mentioned.
• Evil Counterpart: He's basically Rintaro with an It's All About Me attitude rather than being willing to drop everything to help his friends.
• Gangbangers: He and his Viral Attackers, while officially just a Rai-Net team, behave as this, using violence to win matches in addition to getting into all sorts of unrelated criminal activities.
• Hijacked by Ganon: In Linear Bounded Phenogram's tenth chapter, Abduction Across Three Worlds, the ones responsible for Mayuri's disappearance initially seem to be three black-hooded men, with Shido bumping into Okabe twice but being unrelated. Turns out the three men were friends of Mayuri- the whole thing was set off by the theft of her pocket watch, the culprit being Shido.
• Nice Job Fixing It, Villain: In the Kurisu route of My Darling's Embrace, he attempts to mug and kill Okabe and Kurisu, leading the former to do his best to protect the latter. This display of love winds up releasing the 'Darling, You Idiot!' bracelets on them, which only come off when the bickering couple make up and bond. Although it is ambiguous as to whether this is what happened or if the batteries simply ran out, the fact is that Shido's attack strengthened Okabe and Kurisu's bond.
• Plot-Irrelevant Villain: In the Kurisu route of My Darling's Embrace, he and his gang show up at the end to mug Okabe and Kurisu, but he is completely unrelated to the main conflict- Okabe and Kurisu trying to find a specific Future Gadget before it broadcasts sensitive information- and disappears not long after.
• Scary Black Man: Zigzagged. In his debut in the original VN, he is portrayed as a legitimate, if small-time, threat, as a ruthless gang leader who isn't afraid to use violence to win the Rai-Net tournament. In Linear Bounded Phenogram, by contrast, he is mostly portrayed as a recurring nuisance whose villainy consists of petty street crime, and he repeatedly gets humiliated. In My Darling's Embrace, the Kurisu route brings him back to being a ruthless gang-leader who comes close to killing Okabe and Kurisu, and he is at his most threatening in the Faris route, where he's become a full-on white-collar criminal attempting to take over Akibahara's entertainment industry using underhanded tactics to drive existing maid cafes out of business.
• Serious Business: He takes the Rainet tournament so seriously that he's willing to physically assault people over it.
• Small Name, Big Ego: He loves to give himself cool-sounding epithets like the Duke of Darkness and often boasts about how he is the greatest badass in all of the world, but shows himself to be little more than a thuggish crook. In the Faris route of My Darling's Embrace, he actually manages to become a big name as a Corrupt Corporate Executive and trying to take over the entertainment industry, but winds up becoming widely hated rather than widely loved.
• Smug Snake: He fancies himself a shadowy mastermind and incredible genius, but is really just a crook who cheats his way to victory in both competition and business. In every one of his appearances, he gets taken down, and his defeat in the Faris route of My Darling's Embrace drives him into a raging Villainous Breakdown.
• The Sociopath: A very low-functioning example. He desires fame and fortune, and will happily cheat, steal, beat people up, and even become a Corrupt Corporate Executive with zero regard for his workers or his competition.
• Sore Loser: His response to being beaten by Faris and Okabe in the Rai-Net tournament is to send his men after them so he can kill them.
• Villainous Breakdown: In the original VN, he tries to kill Faris and Okabe for beating him in the Rai-Net tournament. In Linear Bounded Phenogram's first chapter, he kidnaps Luka when Okabe first foils his scalping plot. And in the Faris route of My Darling's Embrace, after his illegal and shady corporate activities are exposed, he starts Laughing Mad and going full Chuunibyou before declaring that "this isn't finished" and running away.

Rebellion of the Missing Ring Characters

Kayano

A Rounder from the SERN-controlled future and the main antagonist of the spin-off manga Rebellion of the Missing Ring. She has the mission of chasing down Suzuha, and will capture her by any means necessary.

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• Big Bad: Of the Rebellion of the Missing Ring manga, as she is the Rounder who tracks down Suzuha and serves as her main enemy.
• Even Evil Has Loved Ones: The whole reason she became a Rounder is to provide her sister Hazuki a world of eternal peace.
• Knight Templar: She genuinely believes in the righteousness of SERN and that La Résistance are evil terrorists who want to undo the peace they built.
• Malevolent Masked Men: She wears an Upa mask and is a Rounder sent to kill Suzuha and her allies in La Résistance.
• Woobie, Destroyer of Worlds: She was an ordinary girl living happily with her sister Hazuki, until the Rounders invaded her home and kidnapped Hazuki to turn her into a Sex Slave and use her to brainwash Kayano into becoming fanatically loyal to SERN.

Hazuki

The sister of Kayano who was kidnapped by Rounders to become their Sex Slave. This drove Kayano down her path of villainy.

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• Empty Shell: After being turned into a Sex Slave, she no longer talks or makes many movements.
• Sex Slave: Became this for the Rounders. As a child.
• Walking Spoiler: Her existence spoils Kayano's Dark and Troubled Past.

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