A man of common sense and seriousness. He can be a bit too serious at times, making him inflexible. He wishes to protect others with his truthful articles. He is the protagonist for the prologue and Stage 1.
- Acquitted Too Late: Only finds out he was innocent after humanity went extinct.
- Alliterative Name: Haruto Higurashi.
- Covert Pervert: After listening to Ryo's rants about bondage, he ends up being the one most interested in it, even attempting it after Ryo's boss fight is over.
- Driven to Suicide: Jumps off Mashiro Garden Tower in the intro out of guilt for how his article got the interviewed woman killed.
- Dying Message: At the end of the game before dying of old age for good, he realizes that there is another survivor on Earth, telling Sachika of this before dying.
- Geek Physique: Scrawny and wearing glasses.
- Heroic Sacrifice: The end of Stage 6 has him murdered by Kurosuke to save the others from being killed, this usually wouldn't be a problem in this game. But when they come back it turns out Kurosuke has destroyed his X key.
- Heroic Self-Deprecation: His inner monologues about sins are ridden with this, and he is not very confident about his status as the group's leader. He tones it down after finding out he wasn't actually responsible for the article scandal that got him fired.
- Idiot Hair: Like the Danganronpa protagonists before him.
- Meganekko: Wears glasses even as a child.
- My God, What Have I Done?: When he finds out the woman from his article was killed because of the photo published in it.
- My Greatest Failure: A photo in one of his articles led the interviewed woman's abusive ex-husband to find and kill her. Subverted as Haruto wasn't the one who put the photo on the article.
- Nice Guy: Very kind and understanding, and very earnest in his attempts to help people by grasping the truth.
- Put on a Bus: Due to the Heroic Sacrifice mentioned, he is unplayable for the entirety of Stage 7.
- Red Herring: In Stage 6, he is under suspicion for being Sachika's murderer in their childhood. Turns out he is innocent.
A farmer who works deep in the mountains, and knows more about survival than the average person. Contrary to his cute face, he's cynical and often makes fun of others. He is the protagonist for Stage 2.
- Abusive Parents: Zen's grandfather (and biological father) is single-handedly responsible for Zen's anger and trust issues.
- Animal Motifs: Monkeys, just like his father.
- Broken Pedestal: Loses all his respect for his mother and his Morality Pet Rumiko after finding out about their affairs with his grandfather.
- The Bully: He strangles Ryo once in retaliation to a joke, and teases the idea that Renji hated Yuma. This backfired in his backstory when he tried to tease Rumiko by revealing his own secret.
- Cruel to Be Kind: Throughout Stage 3, he makes rather cold remarks to Minamo and harshly dismisses the group's attempts to console her in regards to having to kill the boss, who happens to be her little brother. This was done by him in order to push her to go through with it.
- The Cynic: Claims to be a realist and initially has a hard time trusting his fellow survivors, specially Yuma and Sachika.
- Death Seeker: States in the prologue that he really doesn't mind dying.
- The Exile: Is practically disowned by his family after harming Rumiko and is ordered to never set foot in their house again. Although his grandfather stated that if he plays his cards right, he wouldve made Zen his heir after his death.
- First-Name Basis: He explicitly asks to be referred to by his first name when introducing himself, immediately hinting his hatred for his family.
- First-Person Smartass: Not that he isn't snarky enough out loud, but his inner monologues in Stage 2 had a lot of this.
- Foil: To Yuma. Both are considered as the Token Evil Teammate. While Yuma loves her father to the point that she follows his every command, Zen hates his biological father.
- The Gadfly: Switches his The Bully tendencies to this after his Character Development.
- Generation Xerox: Not as evident as the other examples in this game, but Zen and his biological father make this sort of comparison to each other a lot in the most climatic moments of Stage 2.
- Heroic Self-Deprecation: When facing the Stage 2 boss, he calls himself a monkey son identical to his father.
- I Lied: Tries to pull this on Rumiko after telling her about his family situation. She doesn't buy it because he was tearing up.
- I Work Alone: Goes through the second floor of Monkey Treehouse Village alone so no one else would watch his past. It doesn't work because Extend TV broadcasts simultaneously on all televisions.
- Insane Troll Logic: When asked if he is fine with killing his own family, Zen claims that sparing them would be unfair to the other creatures they've killed.
- Loving Bully: After his Character Development.
- The Rival: He TRIES to be this to Haruto and Yuma, but it gets quickly dropped after his stage.
- Secret Keeper: Doesn't reveal his grandfather's relationship with his mother and Rumiko to rest of his family, claiming it would only make everything worse for everyone.
- Ship Tease: With Yuma after his Character Development. When the Mashiro Group is revealed to be behind MANI, he is the only one to trust her immediately and convinces everyone else to follow suit. But then he stop backing her after she has some involvement in trying to kill them
- Smoking Is Cool: Loves his cigarettes as seen when he was sulking. Due to his skill as a farmer he considered using tomatoes and eggplant leaves as tobacco substitutes.
- Smug Smiler: Doubles as Stepford Smiler most of the time.
- Screw This, I'm Outta Here!: He attempts to do this in his Stage 2 by exploring the ruins alone so no one else would have to watch his conquest videos. He doesn't get very far though, as the group finds him shortly afterward and Extend TV apparently plays on all of the TV's in the ruins.
- Token Evil Teammate: More of a confrontational Jerkass than properly evil, but Zen is this for the first two Stages of the game.
- Used to Be a Sweet Kid: He once had a positive outlook on life, until he learned the truth about his grandfather and just replaced it with anger.
A cheerful and lighthearted officer who is devoted to her family. She's a straightforward person with a strong sense of justice. She can also be meddlesome at times. She is the protagonist for Stage 3.
- Action Girl: Most fitting as she is a Police Officer.
- Bicep-Polishing Gesture: She does this a lot in conversation.
- Big "NO!": Lets out one once she witnesses Sachika getting repeatedly stabbed by Kuroskue.
- Boobs of Steel: Lampshaded by Shou at the end of Stage 3.
- Defiant to the End: Still chides on the delinquents who killed her while tied up and beaten up.
- Generation Xerox: Both she and her mother were impressively competent policewoman implied to have been killed because they couldn't let go of their strong sense of justice.
- Genki Girl: Very positive and full of energy.
- The Heart: Thanks to being both a Genki Girl and a Reasonable Authority Figure.
- Honor Before Reason: The reason why she qualifies for the sin of pride. This attitude was what got her (possibly) killed and she doesn't allow herself to regret it one bit.
- Reasonable Authority Figure: A very honorable and understanding police officer with a strong sense of justice.
- Supreme Chef: Downplayed. She seems to be the best cook among the party, but states she is nothing compared to her father in this regard.
The only daughter of a big company boss. Exceptionally rich. She often does things at her own pace and has a cold attitude to go with it, and can be an elusive woman. She is the protagonist for Stage 4.
- Ambiguously Bi: While never outright stated, her relationship with Rinko, in both the story and in their bedroom events, really ends up testing the boundaries of a Romantic Two-Girl Friendship, such as Yuma outright saying she wants to get closer to Rinko, with Rinko asking if they can hold hands. Should she reach the "Intimate" level with her, Yuma will outright say Rinko has become "enamored with her body", with Rinko responding that she's "head over heels". On the relationship page, Yuma will also say that they are "more than friends."
- Big Beautiful Woman
- Big Eater: She is the one who portrays her sin in the most literal sense. She is prone to "air eating" at the mention of good food.
- Boobs of Steel: She has the biggest bust of the group and they're still steel even in old age.
- Broken Bird: Copes with her mother's death by rejecting her sense of self in order to become a perfect replica of her. This includes a sexual relationship with her father.
- Cloud Cuckoo Lander: Appears as this sometimes, as she mostly appears to go on tangents in the most important moments, as if to actively ignore the plot relevant events. It's intentional on her part, since she already knows most of the mysteries from the get go and doesn't want the rest of the party to figure it out.
- Deadpan Snarker: She can certainly be witty if she wants to.
- Death Seeker: Not only for herself but for every human clone ever.
- Full-Name Basis: With everyone.
- Generation Xerox: Invoked. Yuma dedicated a huge part of her life to become a replacement for her late mother.
- The Stoic: Downplayed. She never really expresses anything other than a narrow expression. but she is capable of emotion as shown in her Stage.
- Token Evil Teammate: Not evil per se, but her ultimate goal includes killing her entire party.
- The Unfettered: Claims the party being her childhood friends is not enough to stop her from killing all clones.
The bright life of the party. He might look shallow, but he's a good guy who is well-liked by those around him. He is the protagonist of Stage 5
- Anime Hair: The only case of You Gotta Have Blue Hair in the party, and with a really wild hairdo.
- Bald of Awesome: The "awesome" part is questionable, but he balds at old age.
- Butt-Monkey: Not very respected by others, especially Zen.
- Camera Fiend: If he had a camera, he takes shots with his hands only.
- Cowardly Lion: Very easy to scare, but still fights alongside everyone.
- The Ditz: Very easily excitable and not too knowledgeable.
- Driven by Envy: Subverted, despite being associated with the sin, his videos are about him being the target of envy from his mother, who thinks he has all the love and adoration while no one even pities her.
- The Heart: Consequence of being The Ditz.
- Pædo Hunt: During his time at the Coromo Hot Springs, the manager ends up making a move on him, which fueled the anger of Ryo's mother who ended up killing the manager and then herself since she was hoping to win him over.
- Symbol Motif Clothing: The ropes that are tied around his body, representing the most important thing that he knows about his mother.
A woman who works at a flower shop. Shes a kind and hard-working person, but can be a bit of a ditz at times. Shes also a bit of a cautious person. She is the protagonist for Stage 6.
- Impaled with Extreme Prejudice: She gets stabbed with a tentacle in the prologue. Thankfully they were able to revive her.
- Innocent Flower Girl
- My Girl Is Not a Slut: Her sin of lust is using her sexuality for short term protection.
- Neutral Female: During Haruto and Kurosuke's battle she ends up retreating to Garage Island to extend everyone. Justified as Haruto told her to do so.
- Really Gets Around: Had sex with her teacher to get the bullies off her back, then another boy in her class to get another boy who accused her of unfaithfulness off her back. By the time of humanity's extinction, Mamoru reveals that Rinko have multiple STIs from her sexual activities, hinting that she didn't stop after high school.
- Remembered Too Late: Only remembers that Haruto was a member of their group when they were kids after he decides to hold off Kurosuke before they escape in Stage 6.
- Signature Headgear: Has a gerbera flower in her hair at all ages. It's her birth flower and is she is very attached to its hanakotoba meaning of "constantly moving forward".
A buff and muscular doctor. He's intellectual, peaceful, and a gentleman. He's also easy-going. His favorite saying is "love." The protagonist of Stage 7.
- Badass Beard: In his adult stage it's more like peach fuzz. In his middle age, it's starting to fill. By his senior stage, it's a full and thick beard.
- The Big Guy: He has the largest build of the cast after reaching the adult stage and still maintains it even after reaching the senior stage.
- The Chessmaster: The mastermind for putting the protagonists on Garage Island.
- Heroic Build: Though his body is built after the end of the world.
- My God, What Have I Done?: Just before he finalizes his revenge plan and destroys the only means of reviving Haruto, Sachika's "original personality" awakens and pleads with him to not take away her friends. He collapses, and considers himself a mediocre man.
- Overshadowed by Awesome: His parents abandoned him after learning he was lacking in natural intellect.
- The Reveal: He's the one behind Extend TV and the one who originally made the Sho and Mirai skits, all just to get the Garage Kids to realize they're responsible for getting Sachika killed. He also reveals in Stage 7 that Sachika is his sister.
- Revenge Before Reason: He initially opposed Daichi Terashima's plan to make the Garage Kids clones with a time limit, but then quickly changed his mind when Daichi revealed that they played a part in causing Sachika's death.
- Unwitting Pawn: For his father in the grander scale.
- Walking Spoiler: See how much of his true role is whited out? That's how much he means in the grander scale of the plot!
An innocent young girl, full of curiosity, with a thirst for knowledge. Due to her innocent behavior, she appears younger than she really is.
- The Ageless: Unlike the other clones, her X-Key is an older model and keeps her at a stable appearance, rather than rapidly aging her. After her X Key is destroyed by Dr. Terashima, it gets put into the Unit 01 Extend Machine and brings her back, but as a baby.
- Animal Motif: Sheep. Aside from her obvious sheep purse, she is portrayed as a sheep during the flashbacks to her mutilation by Kurosuke and given the title "black sheep". All sheep dolls found in dungeons that are stabbed and torn apart are implied to represent her.
- Artificial Limbs: She has a metallic right arm and left leg.
- Clones Are People, Too: After she became a clone for a first time. Ichiyo found out the hard way that she is nothing like Sachika was in her previous life.
- Genki Girl: Very enthusiastic and energetic.
- Sole Survivor: By the end of the game, she's the last natural human being on Garage Island raised by the clones until the Extend Machine finally breaks down and they die one by one, leaving her alone.
- Walking the Earth: The ending has her using Garage Island to travel around the world to find any survivors of the Day of Reckoning. She does.
- Younger Than They Look: Is 25, but looks and acts younger than the rest of the group.
An assistant of the anime program "Extend TV" that is used as a guide by the eight survivors. His role is the boke (funny man) for the program.
- Abusive Parent: He talks about his father who would hit him every often.
- Dirty Kid
- Expy: Shares an incredible similarity to Chargeman Ken!
- Grew Beyond Their Programming: He, along with Mirai, do what they can to ensure the cast defeats them, as they didnt want to kill them since both A.I.s have grown to like them.
- Idiot Hair
- Meaningful Name: Sho being Daichi's consideration for his son's name, and his last name.
- Vocal Dissonance: In the Japanese Dub, he has the voice of a old man.
The host of the anime program "Extend TV" that is used as a guide by the eight survivors. Mirai's role is the tsukkomi (straight man) for the program.
- Butt-Monkey: She's on the receiving end of unfair treatment despite being the straight man. This includes getting chopped up by a swinging axe and people talking about her butt.
- Grew Beyond Their Programming: She, along with Sho, do what they can to ensure the cast defeats them, as they didnt want to kill them since both A.I.s have grown to like them.
- Verbal Tic: She makes "bahhh" noises when she says a word with similar sounds.
"Olga Bellicore"A spy secretly working for her country in the MANI laboratory.
- Big Brother Worship: Frequently showers her sister with praise in her narration.
- Dark and Troubled Past: Went through torturous spy and assassin training when she was younger.
- Honey Trap: Her tactic to get closer to Dr. Terashima.
- No Name Given: Olga Bellicore is an alias used in her mission. Despite this, her sister still calls her Olga in their private conversations.
- This Is Unforgivable!: Cloning.
Doctor Daichi Terashima
The head researcher in charge of MANI's cloning projects.
- A God Am I: His reborn self wants to recreate a new kind of humanity, and even calls himself God Terashima...before deciding to redo his introduction, and instead going by Extend Terashima.
- Big Bad: The true mastermind behind the events of the story.
- Cloud Cuckoo Lander: Fitting most Mad Scientist stereotypes. In her first week at MANI, Olga saw him peeling a wallpaper to write on the walls, sleeping inside a lab full of researches because he got stumped, and giving individual names to each of his fingers and having them act out a play.
- Crouching Moron, Hidden Badass: Speculated by Olga to be much more sane and calculating than he seems.
- Didn't See That Coming: He engineered the Luciora outbreak to blackmail Yumas father to allow him to continue his research, but he expected it to only affect the MANI underwater facility. He didnt expect the Extend Machines outside in Mashiro City to also turn on and spread Luciora, turning humanity into creatures and destroying the world.
- Dirty Old Man: Lecherous and has a reputation for soliciting sexual relationships from young women.
- The Dog Is The Mastermind: In Sachika's prosthetic no less.
- Hostile Show Takeover: Decides to make Shin Extend TV on a whim, with improved visuals and Mirai & Sho developing sentimental AI.
- It Amused Me: The reasons behind a lot of what he does can simply be described as I was bored.
- Kick the Dog: Takes immense pleasure when he reveals to his son Mamoru that the memories and personality of the original Sachika was actually him acting the part.
- Milking the Giant Cow: He makes large, sweeping gestures with his arms just in normal conversation.
- Older Than They Look: He is 61 and his hair has yet to start graying.
- Rule of Cool: The reason he provided to building his lab in the middle of the ocean.
- Sharing a Body: Was able to observe things through Sachika's eyes, and occasionally took direct control while posing as her original personality.
- Taking You with Me: Before he dies, he stabs Sachika through the stomach, destroying her X-Key. And since Sachika is the only one among them who can get pregnant and also theoretically stop the aging effects of the new X-Keys, Terashima ensures the Garage Kids will join him in death sooner or later.
- Walking Spoiler
"Olga Bellicore"'s sister
Editor-in-chiefHaruto's former boss. He is the boss of Stage 1.
- Boss Arena Idiocy: Fittingly as the sin of Sloth, he won't ever move from his spot, meaning you can break his necktie and then just use hit and run tactics on him until he dies.
- Chairman of the Brawl: He has an office chair as one of his weapons that he only uses if his necktie is broken and if anyone's too close.
- Combat Tentacles: Has a huge one on his neck, made to look like a tie.
- Frame-Up: Convinces Haruto he is responsible for the editor-in-chief's own mistakes.
- Poisonous Person: His tentacle inflicts poison.
Zen's grandfatherZen's grandfather and biological father. A rich owner of many farms and lands, with his most lucrative one being Monkey Treehouse Village. He is the boss of Stage 2.
- Abusive Parents: Is the sole cause of every problem in Zen's life.
- Animal Motifs: Monkeys, just like Zen himself.
- Flunky Boss: Fights alongside 3 Creatures and 2 monkeys.
- Generation Xerox: Invokes this trope in a few occasions with Zen, while also feeling his other son failed to accomplish it.
- Men Don't Cry: Calls Zen pathetic for throwing up during his wife's funeral.
- Not So Different: Often gloats that Zen is just like him.
- Poisonous Person: One of his attacks is spilling a poisonous mist in all directions. You could say he builds a toxic environment around himself.
Rumiko KubotaA girl who joined the Kubota family by marrying Zen's brother (biological nephew) and formed an Odd Friendship with him.
- Morality Pet: Convinces Zen to pull his life back together.
Hiroki SetouchiMinamo's younger brother. He is boss of Stage 3.
- Apologetic Attacker: One of his attacks as a boss is bowing his head down in apology, releasing a very long-range and hard-hitting wave of goo.
- Extreme Doormat: His easily scared personality leads him to steal a watch and become bait to lure his sister so he wouldn't get beat up by delinquents.
- Tragic Monster: The first Boss in the game to be portrayed as a relatively decent person in the past.
Minamo and Hiroki's father
- Supreme Chef: His bento business was never doing well, but according to Minamo, her own cooking skills paled in comparison to his.
Renji MashiroYuma's father and the head of the Mashiro Group.
- Broken Pedestal: After seeing a real life video of her father involved in the MANI research, Yuma begins to have her doubts on showing absolute obedience to her father.
- Face Full of Alien Wing-Wong: The video of Renji meeting Moi's clone has him get this the hard way with her shoving clione tentacles inside his orifices. It's unseen what happens, but it was nasty enough to make him say no more to cloning.
- Fiction 500: Seems to own everything that appears in the game.
- Parental Incest: He had a sexual relationship with his daughter due to treating her as if she was his late wife Moi. It didnt help that Yuma purposefully overate to gain weight so she more resembled her mother in appearance, and did her best to do whatever her father wanted.
- Posthumous Character: Died 3 days before his daughter wakes up on the island. Murdered by an assassin in front of her no less.
- Yandere: Is very dedicated into giving his wife only the very best. His overwhelming love for Moi leads to him investing into clone research after her death, which directly or indirectly causes all the events of the game.
Moi MashiroYuma's mother.
- Big Beautiful Woman
- Came Back Wrong: Moi was returned as a clone but due to complications of the Clione and Luciora. She notices her husband and attempts to have sex with him only for her Clione tentacles to enter his orifices and nearly kill him if not for the self destruct.
- Generation Xerox: Yuma started copying her after her death.
- Ill Girl: Couldn't leave the house often because of it and died young.
- Abusive Parent: Often verbally berated Ryo, though it seemed to go mostly unnoticed by himself. She also intended on strangling him, but ultimately did not go through with it. Mamoru suggests it may have been the sliver of parental affection she had for him that spared him.
- Driven by Envy: She bemoans her unfortunate life and squarely blames Ryo for constantly being minded and cared for.
- Parental Neglect
Inn ManagerThe manager of the inn Ryo's mother worked at. He is the boss of Stage 6.
KurosukeA mysterious black sheep-like Creature.
- Deader Than Dead: After his boss fight, his X Key is removed from the Extend Machine destroying his body permanently, and Haruto's data is overwritten on his X Key.
- The Dreaded: Everyone panics just from the sight of him. During the first encounter, they couldn't even move while he was singing.
- Identical Stranger: His human appearance was very similar to adult Haruto's, leading to the latter being under suspicion during Stage 6.
- Ironic Nursery Tune: During its appearances, the song "London Bridge Is Falling Down" plays in everyone's heads.
- It Can Think: Kurosuke is capable of limited speech, and is able to address Sachika while hunting her down.
- Knight of Cerebus: Things get a lot more serious when he's around.
- Meaningful Rename: From "Yosuke Kurosaki", to "Kurosuke" (black assistant, specifically to Dr. Terashima).
- The Reveal: He was a human named Yosuke Kurosaki, the man that murdered the original Sachika. He had an X-Key of his own, but was turned into a human-Clione hybrid for military research.
- Sadistic Choice: He gave the Garage Kids this to point to who they want to see die. It was this that led to him killing Sachika.
- Sharing a Body: After his data is overwritten with Haruto's, he's briefly able to talk to the latter inside his mind, though it doesn't come up again.
- Unwitting Instigator of Doom: Possibly, since he wouldn't have guessed that him murdering Sachika would lead to him being used as a test subject and eventually lead to the apocalypse.
- Would Hit a Girl: He has no remorse killing the girls in the party as shown in his first appearance.
- Would Hurt a Child: He'd even kill one, or more than twenty, according to newspapers found in Kaiyo Academy.