Warning! All spoilers below are unmarked.
- It's virtually impossible to list tropes for these characters without spoiling everything or creating Self Fulfilling Spoilers because of the large amount of surprising reveals and murderer/victim exclusive tropes these novels contain. Also, since these novels are a prequel to Danganronpa: Trigger Happy Havoc and Danganronpa 2: Goodbye Despair, there will be spoilers for both games here.
Ultimate Forgetful Girl/Ultimate Analyst
The heroine of the book. Ryoko suffers from anterograde amnesia, a condition that causes her to forget things shortly after they happen. In order to function in day-to-day life, Ryoko keeps a "memory notebook" filled with information about herself and her daily routine. She is hopelessly in love with Yasuke Matsuda, the doctor researching her memory loss. She is actually the amnesiac Junko Enoshima, Created to test the memory loss procedure used in the first game to erase the students memories.
- All There in the Manual: Her talent of "Forgetful Girl" isn't actually given in the book itself, just in her character sketch at back of the first volume. Mostly because it isn't actually a real talent and is just a label.
- Amnesiac Dissonance: It's a rather horrifying implication that this is the mind of a girl who has already orchestrated the deaths of the Hope's Peak student council, and whose experiences and innate nature would lead her to become a mass murdering terrorist leader obsessed with despair.
- Awesomeness by Analysis: Ryoko's talent. During the few times she remembers she has it, she can easily curbstomp trained assassins and 'read' people's emotional flaws to an almost precognitive degree.
- The Cameo: Ryoko Otonashi appears briefly Super Danganronpa 2.5, along with Matsuda and Madarai.
- Casual Kink: After it's explained to Ryoko why she's tied to a bed, her fear dissipates and she actually starts feeling a little excited about the experience.
- Cloud Cuckoolander: Even factoring in her condition, Ryoko doesn't think much like a normal person. At one point she even dreams about going to America with Matsuda to start a corn farm...on the moon.
- The Ditz: Acts like a scatterbrain much of the time. Though, for all intents and purposes, it's her memory loss doing it.
- Enemy Within: It is implied that Ryoko temporarily regains her memories as Enoshima in certain scenes.
- Expository Hairstyle Change: She must have dyed her hair twice, once shortly prior to her memory loss and once again after her memory recovery. Changing her hair from blond to red is one of the things that catches Naegi off-guard.
- Evil Redhead: It's implied that red is actually Enoshima's natural hair color and she just dyes it blond.
- Fiery Redhead: A... rather eccentric one.
- Forgetful Jones: Her "talent", for better or for worse. She forgets almost everything she learns and she has to rely on her notebook to remember stuff.
- Full-Name Basis: If the narration refers to her by her name, it will always be her full name. Whenever she refers to herself by name, she does it internally and it's always her full name. This oddly sterile quality of the narration and Ryoko's inner voice is probably meant as more Foreshadowing to the fact that the name is made-up.
- Genki Girl: Most of the time anyway. She's a cheerful girl, but she's not the plucky type.
- He Knows Too Much: Madarai goes after her because of this. Ironically, she doesn't know much, he just assumes she does.
- Hey, You!: Whenever she introduces herself by her name, she just points at her notebook and people read "Ryoko Otonashi". However, neither the other characters call her by that name (regardless if it's the first, the last or the full name) nor does she vocally call herself by that name, which foreshadows that "Ryoko Otonashi" isn't her real name. This becomes a plot point, as neither Kirigiri nor Naegi call her by any name, even though they know she's Enoshima.
- I Just Want to Be Loved: Matsuda theorizes that Ryoko's obsession with him is how she copes with the loneliness induced by her condition, although Ryoko herself refuses to hear it.
- It's All About Me: It isn't overt, but at times Ryoko is shown to barely care about anything that doesn't concern her or Matsuda. Justified, given that she can't remember anything besides Matsuda and thus treats it as irrelevant.
- Jekyll & Hyde: Her connection to Enoshima. Certain scenes suggest she hallucinates seeing her when she begins to reclaim her memories.
- Never My Fault: She has a habit of saying "that has nothing to do with me". The most blatant example is when Naegi is taken hostage by Madarai, and Ryoko Otonashi refuses to help him because she insists to be completely uninvolved and she blames Naegi's bad luck for his situation.
- Note to Self: The function of her notebook. It contains most of her memories she has experienced during her amnesiac time.
- The Power of Love: A strong believer of this in regards to Matsuda.
- Red Eyes, Take Warning: Assuming her eyes are really the same color as her hair. Not only may she have killed one of the Madarai brothers with Home Alone inspired traps, but towards the end of story begins to become even more unhinged and is willing to commit murder if that's what it takes to see Matsuda again. There's also the point at which she stabs Matsuda while in a fit of despair, then proceeds to kill him brutally, which even gives her an overlay of Monokuma's red eye over one of her own in the accompanying image.
- Remember the New Guy?: Given that she's seemingly a new character, we learn that Naegi has already met her in the past. It's subverted, as it turns out that the reason why Naegi remembers her is because she is Enoshima.
- Single-Target Sexuality: Matsuda, and that's putting it mildly. There almost isn't a single moment where she isn't thinking about him.
- Supporting Protagonist: About half of the story is narrated from her perspective and yet Ryoko takes an almost entirely passive approach to the events. Mostly because, in her own words, she doesn't care about other things besides Matsuda because she'll eventually forget about them. Somewhat fittingly, Ryoko lacks an Idiot Hair (a characteristic of main characters in the franchise) while Matsuda has one.
- Third-Person Person: An odd variation. There are a couple of times where she internally refers to herself by her full name, as if Ryoko Otonashi is a different person. This is a hint that Ryoko Otonashi isn't her true identity.
- Throwing Off the Disability: Played with. While Ryoko does lose her condition at the end, she didn't actually have real anterograde amnesia, her memory condition instead being a side effect of the memory wipe put on her.
- Tomato in the Mirror: "In truth, the girl known as Ryoko Otonashi never even existed!"
- Unreliable Narrator: Comes with her condition. Notably, chapters from her perspective are narrated in first person whereas the others aren't.
- Villain Protagonist: She is not a villain but Junko certainly is and this story is primarily concerned with the "two" of them.
- Violently Protective Girlfriend: She snaps into a fit of blind rage when she finds out a goal of Junko Enoshima's is to kill Yasuke Matsuda. She vows to do whatever it takes to protect him and their world. And then we find out she was Enoshima all along...
- The Watson: Picks up on a lot of the exposition of the other characters. Granted, she tend to forget about it...
- Wrong Genre Savvy: When she snaps at Kirigiri, she believes to awaken hidden Psychic Powers when the glass on the door is breaking. She tries to use Telekinesis on Kirigiri's head to kill her off, but it obviously doesn't work and it's just her wild imagination. Why was the glass breaking? It's because Madarai broke it.
- Yandere: Spirals into this near the end, where she agrees to murder the Madarai brothers just to see Matsuda.
Ryoko's doctor, love target and childhood friend, Matsuda is renowned for his knowledge and skill relating to the human brain. He also happens to be aloof and overly rude. Matsuda is in fact the childhood friend and lover of Junko Enoshima, having created the identity of Ryoko for her in order to protect her from others - including, to his own word, herself. This leads to him murdering Murasame and Kamishiro when they get too close to the truth. Eventually, he tries to kill Ryoko after realizing Enoshima was using him as a pawn, and is stabbed to death.
- Anti-Villain: While the fact that Enoshima has been using him without him knowing may make him sympathetic, he is still not one of the "good" guys.
- The Atoner: He eventually realizes that his attempt to salvage Enoshima's sanity has failed and he must kill her to protect humanity (having personally killed everyone else who tried). He's too late.
- Bishōnen: His body is slender and gentle-featured, in contrast to his personality.
- The Cameo: Matsuda appears briefly in episode 8 of Danganronpa 3: Despair Arc and in Super Danganronpa 2.5, along with Ryoko Otonashi and Madarai in the latter.
- Character Death: Stabbed to death (repeatedly) by Ryoko.
- Childhood Friend Romance: It is implied and eventually confirmed that he and Ryoko were childhood friends. Ryoko is very much in love with him, while he seems at best annoyed by her. He actually does return those feelings, which form the backbone of the true story.
- Conveniently an Orphan: It's mentioned in the flashback dealing with his mother's death that he has no other friends or family. Convenient since it allows the school's committee to blackmail him without repercussions and no one will notice that he's working with a mass murderer.
- Deadpan Snarker: To contrast our ditzy and... unusual heroine.
- Deuteragonist: One could say Matsuda is the actual main character of the book, despite only getting major focus halfway through.
- Dr. Jerk: Rarely nice to anyone. Even if it is A) His fellow student, B) His patient, and she is C) Openly head-over-heels for him.
- Does Not Like Shoes: Spends much of his time in his lab barefoot.
- Friendless Background: Even in the present point in the story he cuts himself off from people.
- Good Cannot Comprehend Evil: For a given value of 'good'. He initially believed that Enoshima's despair could be healed, as if it were a mental disorder or illness. In reality, Enoshima despairs because it is in her nature to do so, and she doesn't want to be 'helped' (though she enjoys sanity in some ways, as it alleviates her endless boredom).
- HeelFace Door-Slam: Is killed just after realizing that Enoshima was using him as an Unwitting Pawn.
- He Knows Too Much: Murders Murasame for this reason.
- Hot Scientist: Ryoko certainly thinks so.
- Hypocritical Heartwarming: Just because he bad mouths Ryoko whenever he can doesn't mean he will let anyone else do the same, even if they are part of the Steering Committee.
- Idiot Hair: Has one per franchise tradition, though he's far from stupid. Interesting, as within the franchise they tend to be a marker of A) being a protagonist and B) having Hope.
- I'm Going to Hell for This: He acknowledges in monologue that his murders were completely unjustified and he's a horrible person.
- Improbable Age: Even when you factor in the sort of people that go to the academy, Matsuda is around 17-18 and yet is skilled at one of the hardest fields in medical science. A flashback outright implies he's been studying to become a neurologist since elementary school.
- Jerk with a Heart of Gold: Despite Matsuda's mercilessly sharp tongue and rudeness, he sure does love Junko. More under Tragic Villain below and The Atoner above, but it's also implied that he began to study neurology out of bitterness regarding the doctors being unable to save his mother; he didn't want anyone else to go through what he did.
- Kill the Ones You Love: Attempts this on Ryoko, having decided it to be his only option left. It earns him a knife to the gut.
- Like Parent, Like Spouse: It's stated by Ikusaba at the end that Ryoko Otonashi's appearance was based on Matsuda's late mother.
- Loving a Shadow: He's despised Enoshima ever since she fell into Despair. Realizing this is what really causes him to break.
- Missing Mom: His mother's death by an unspecified brain condition is what led him to become a neurologist. Enoshima states as he's dying that she was responsible for her death, though how truthful she was is left ambiguous. Given the circumstances, she was probably lying in an attempt to drive her lover further into despair before he died.
- Morality Pet: Like Mukuro, he is proof that Junko Enoshima is capable of love, but also like Mukuro, he is proof that said love is twisted and vile because she manipulates him and then kills him personally.
- No Kill Like Overkill: After he's stabbed to death, Enoshima beats his corpse so badly it's described as barely looking human.
- Official Couple: With Enoshima. Unfortunately for him, his girl has an out-of-control fetish for despair and misery. And what could make one feel more of either than murdering someone you love personally?
- Sympathetic Murderer: He will do anything to protect the girl he loves... Too bad that girl is Junko Enoshima.
- Teen Genius: He got into the school because he is a neurology-based one.
- Tragic Villain: He never wanted to hurt anyone or even cause despair - all he was actually trying to do was protect his girlfriend, the only emotional support he had since his mother died. For it, he got used as a pawn, killed two of his fellow students, tried to kill said girlfriend after realizing it was the only option he had left, and ended up stabbed, dying under the belief that his girlfriend might have actually been responsible for his mother's death. For a kicker, Enoshima beats his corpse to beyond recognition and steals his research. Ouch.
- Unreliable Narrator: Knows almost everything that's going on, something the narration goes to great lengths to hide.
- Unwitting Pawn: To Enoshima. He doesn't take realizing her manipulation well.
- Used to Be a Sweet Kid: Was a very reliable and decent child prior to his mother's death.
- Walking Spoiler: Big time, since, despite being a main character, much of what we know about Matsuda is only given in connection to most of the plot twists.
- What Measure Is a Non-Human?: He- correctly- considers Ryoko a mere role that Enoshima is playing, and talks to her as he would Enoshima (for example, his comment that Ryoko has an "ugly heart"). Despite this, he still feels disappointed when Ryoko 'dies'.
Ultimate Secret Agent
A classmate of Matsuda's, Kamishiro has the voice and appearance of an elementary school student, something perfect for hiding in crowds. Despite his appearance, Kamishiro (barely) conceals intense lust and takes an interest in Ryoko. He is killed by Matsuda, who breaks his neck near the end of volume two in order to conceal the truth.
- Big Eater: Is always seen eating.
- The Cameo: He briefly appears in episode 5 of Despair Arc.
- The Cuckoolander Was Right: Despite his eccentric behavior, Kamishiro was right about Enoshima being the mastermind behind the Tragedy of Hope's Peak Academy.
- Establishing Character Moment: Subtle, but it's noted in his first conversation with Ryoko that he spends the whole discussion staring at her skirt. Less subtle is his official art as you can see here. If you don't already see it you may want to not look too closely.
- He Knows Too Much: Which is why Matsuda killed him. Also, he's only character who figures out that Enoshima is related to the Tragedy of Hope's Peak Academy and that she's behind that incident as well.
- He is aware how dangerous this trope is, thus he doesn't share with his junior agent Chihiro Fujisaki any information he doesn't need to know.
- Hidden Depths: When he meets up with Ryoko towards the end, Kamishiro shows a different side of himself; that being of someone who simply wishes to be seen and noticed.
- Lovable Sex Maniac: His profile notes him as having "Uncontrollable Sexual Desire" and it shows. His official artwork is even visibly sporting an erection. His last scene suggests it might partially be a way of making people notice him.
- Meaningful Name: "Yūto" is spelled with the characters for "actor" and "rabbit" which is very fitting since his primary traits are looking like an adorable and harmless child, his ability to blend into almost any situation (whether he wants to or not), and his uncontrollable sex drive.
- Neck Snap: Snapped by being turned all the way around, so he is looking up at the ceiling despite his body facing the ground.
- The Nondescript: He is described as being so average it is hard to remember him or even notice him in the first place, which is why he makes a great spy, but he hates being seen (or, indeed, not seen) like this.
- Plucky Comic Relief: His antics provide much of the comedy in an otherwise extremely bleak story.
- Older Than He Looks: Around 17-18 years old and yet looks 10. Has the voice to match as well.
- Small Name, Big Ego: He is prone to praise himself and making everything he says as dramatic as possible, even though he's a very forgettable and unnoticeable person.
- Stealth Hi/Bye: Without the bye-part; he often appears out of nowhere due to his lack of presence.
- Surprisingly Sudden Death: Ryoko takes a while to notice that based on his unnatural pose he was murdered and it happened without her noticing despite having a conversation with him at the time.
- Teen Super Spy: His Ultimate talent. He's the Ultimate Secret Agent.
- Teens Are Short: He is often mistaken as a child due to his height.
- Trademark Favorite Food: A seemingly endless supply of bread he gets from his "Hänsel and Gretel" bag or even his coat pockets.
- Wham Line: While Kirigiri has already told her, Kamishiro confirms to Ryoko that Matsuda is Murasame's murderer.
Ultimate Bodyguard/Ultimate Octuplets
A defender of the academy with the appearance of a snake, Madarai is determined at any cost to find the perpetrator of The Worst, Most Despair-Inducing Incident in the History of Hope's Peak Academy. This leads him to pursue Ryoko, who through circumstance is marked as dangerous. After the confrontation, he is subsequently attacked and killed by Enoshima. Later on, Madarai returns and it is revealed that "Isshiki Madarai" is actually the eight identical siblings Isshiki, Nisshiki, Misshiki, Yosshiki, Gosshiki, Rosshiki, Shisshiki, and Yasshiki who are renowned for their superhuman synchronization skills. They are all eventually killed by Ikusaba.
Isshiki is the first one to be introduced, confronting Ryoko Otonashi and Enoshima (actually Ikusaba in disguised) at the school's central fountain, and he would pursuit the former relentlessly until he's trapped by her in a shed. Nisshiki assaults her right after she has defeated the elder brother, but he's killed by the disguised Ikusaba on spot. Misshiki appears in Matsuda's laboratory where he takes Naegi as a hostage, but he's overwhelmed by Ikusaba's fighting skills. Later on, Yosshiki and Gosshiki corner Ryoko Otonashi and Kirigiri in Matsuda's laboratory who are also backed up by their brother Rosshiki. After Ryoko Otonashi jumps from the building to escape, she's cornered by Shisshiki and Yasshiki as well as by Yosshiki and Gosshiki, while Rosshiki is busy fighting Kirigiri. The four brothers ganging up on one girl are all merciless defeated by Ikusaba at once.
- Animal Motifs: Is frequently compared to a snake both in appearance and behavior. The fact that there are 8 of them also makes them a reference to the Orochi, the eight headed serpent.
- Always Identical Twins: Exaggerrated trope. Despite being Octuplets they are all identical.
- Backup Twin: And plenty of them.
- The Cameo: Madarai appears briefly Super Danganronpa 2.5, along with Matsuda and Ryoko Otonashi.
- Chuck Cunningham Syndrome: They were absent when The Worst, Most Despair-Inducing Incident in the History of Hope's Peak Academy happened, which led them to "survive" the incident.
- Custom Uniform: A traditional Japanese boy's uniform, instead of the blazer that the other students wear.
- The Dividual: An exaggerated example of Twindividual since either in order to keep up the illusion of Isshiki being alive (and immortal as they put it) or as a part of their normal MO as the Ultimate Bodyguard/Octuplets they all act and tend to be treated as one character instead of eight.
- Eerie Pale-Skinned Brunette: A rather sinister example.
- Expy: Visually of Orochimaru, which makes sense since his design is using the same motifs.
- Face of a Thug: Downplayed. He looks incredibly sinister, but he's actually quite polite and incredibly loyal to the academy. This doesn't stop him from being ruthless when he needs to be, however.
- Finishing Each Other's Sentences: And they do it so well other people only notice that there really are more than one by them saying different names or that there is more than appears by the sentence being said three times instead of two.
- Hive Mind: It's suggested that the Madarai brothers have this to a degree a la Twin Telepathy taken Up to Eleven, like many of their Twin Tropes are.
- It's Personal: They were not there when The Worst, Most Despair-Inducing Incident in the History of Hope's Peak Academy occurred. Aside from their guilt as failed to do their job as the Student Council's bodyguards, they weren't even targeted by the criminals and didn't consider them as a real member of the Student Council, feeling humiliated by that. Now they want revenge.
- Jerkass Has a Point: In the end, Madarai is not completely off with his belief of Ryoko Otonashi being involved with the massacre of the student council, as it is later confirmed that Enoshima orchestrated it.
- Jumping Off the Slippery Slope: When they attempt to kill Kirigiri, the headmaster's daughter, in order to prevent her discovering the details behind the Incident.
- Meaningful Name: "Madarai" is spelled with the characters for "uneven" and "Well" (as in where you get water from) and plays off the Madara/"Murderer" pun.
- My Friends... and Zoidberg: He is elected as a Student Council "member" to be the council's bodyguard. But neither the Student Council members nor the criminals behind The Tragedy consider him as an actual member.
- Mythical Motifs: In addition to the snake motif they have Orochi and Onryo motifs based on Japanese Mythology.
- Neck Snap: How one of them dies.
- Numerical Theme Naming: The brothers first names are all spelled with the character for 1-8 followed by -shiki (or "Ceremony").
- Overly Long Tongue: He is depicted to have a very long tongue.
- Revenge Before Reason: His Fatal Flaw, as his determination to avenge the academy leads him to pursue Ryoko, a frightened girl with no idea what's going on, with the intent to torture her for information.
- Stringy-Haired Ghost Girl: While they are not a traditional example, being several living males who dress in black, they clearly have the core traits of Onryo: long hair black hair contrasting very pale skin, desire to avenge a wrongful death which ends up effecting everyone around them, and ultimately the target of their revenge is never really punished for what they did.
- Tsurime Eyes: Barley extend beyond slits.
- Undying Loyalty: To the Academy.
- Walking Spoiler: Yup, another one... Well, another eight, which is part of what makes them this.
- We Hardly Knew Ye: Killed by Enoshima in the first volume shortly after Ryoko escapes. Subverted when it turns out he, or rather they, aren't quite finished yet.
- Well-Intentioned Extremist: To a rather blatant extent. His obsession with avenging The Tragedy is what drags everyone down.
- What Happened to the Mouse?: One has their neck broken by Fake!Enoshima (Nisshiki), the one Ryoko knocked out in the shed (Isshiki) is implied to of been killed, one was curb-stomped in Matsuda's laboratory (Misshiki) and four are defeated in combat by Ikusaba (Yoshiki, Gosshiki, Shisshiki and Yasshiki) before being killed by her and Ryoko. What happened to Rosshiki is never explained or shown, even though its implied in the epilogue that all the brothers died since he/they were "expelled" from the school like Matsuda was.
- Younger Than He Looks: Looks like a giant in comparison to the others, going by a piece of group art.
Ultimate Fashionista/Ultimate Despair
The main villain of the first game, Enoshima continues to be completely intoxicated in despair. She claims that she is responsible for Ryoko's missing memories and her plans include killing Matsuda. In actuality, "Enoshima" is Ikusaba in disguise, working under a script as part of her sister's plan.
- Action Girl: Puts up a very good fight against Madarai. Mostly because it's actually Ikusaba fighting.
- Ax-Crazy: The founder of Ultimate Despair who wants to make everyone experience "Despair".
- Big Bad: Sorry, not the real one.
- Character Exaggeration: The book essentially turns Enoshima's already over-the-top personality Up to Eleven. This makes sense, given that's its not the real her.
- Laughably Evil: Even more so than before!
- Talkative Loon: Retains the way IF rendered her speech pattern.
- Twin Switch: Yep, again.
Headmaster of Hope's Peak Academy
The academy headmaster, Jin Kirigiri is split after the incident, hiring his daughter to investigate.
- Absurdly Youthful Father: Has a teenage daughter despite only being in his mid to late thirties.
- Break Her Heart to Save Her: Threatens his daughter with expulsion should she continue investigating the incident, doing so in order to save her.
- Disappeared Dad: To his daughter Kyoko Kirigiri. Jin Kirigiri left his family and detective duties to pursue his job.
- Doomed by Canon: A variation. Jin Kirigiri is killed just before the events of the first game. Since this takes place about a year before that, he safe here, but still destined to die.
- Hair Color Dissonance: His hair appears dark purple in promotional art, but is black in Danganronpa 3.
- Older Than He Looks: Noted by Matsuda when they meet.
- Reasonable Authority Figure: He just wants to keep his students (and academy) safe.
- Love Freak: Well, "Talent Freak". It's not obvious, but he really likes talent. The end spells out that, because of his love for talent, Jin Kirigiri outright let Enoshima preform her plans until it was too late because he saw despair as viable talent.
- Parental Neglect: He left his daughter to pursue his job.
- Puppet King: While he's officially the headmaster, the novel established him to be little more than a pawn for the corrupt Steering Committee.
- Unwitting Pawn: Just like everyone else.
- Well-Intentioned Extremist: He did some pretty terrible things, including shielding a murderer and approving of the way Izuru Kamukura was raised (made worse when Danganronpa 2 revealed just how Kamukura was created) but did it all out of his sincere love of the academy.
The estranged daughter of Headmaster Jin Kirigiri and descendant to a famous line of detectives, Kyoko is hired by her father to investigate the incident.
- Action Girl: Subverted. She's not portrayed as a fighter, and the five Madarai brothers decide that they leave her to Rosshiki since she lacks combat skills and experience, while the other four are ganging up on Ryoko Otonashi and Ikusaba. The last time she appears in Zero is when she wakes up in the infirmary, implying that she was beaten by Rosshiki Madarai.
- Cry Cute: It almost happens when she becomes so upset and angry about her father withdrawing her from the investigation that tears are nearly dropping from her eyes.
- Failed a Spot Check: Played with. Despite she's the Ultimate Detective, it first appears that Kyoko fails to realize that Ryoko Otonashi has the same face as her classmate Enoshima, but in the end, it's revealed that Kirigiri was fully aware of her. The readers are led to believe that Kirigiri doesn't recognize her due to the Hey, You! trope used on Ryoko Otonashi. On the other hand, Kirigiri is seemingly unaware that Enoshima is connected to the Tragedy of Hope's Peak Academy, mostly because she's focusing investigating on the Steering Committee, Kamukura and Matsuda.
- First-Name Basis: Contrary to how she is usually referred by Japanese media, Kirigiri is referred to as "Kyoko" by the narration, since her family name is already used to refer her father who was introduced much earlier than her in Zero.
- Great Detective: Her talent, which also runs in her entire family.
- He Knows Too Much: Nearly becomes victim to this, as she witnesses the death of one of the Steering Committee's members at first hand.
- Hero of Another Story: She is the Deuteragonist of Danganronpa: Trigger Happy Havoc and The Heroine of Danganronpa Kirigiri.
- Nerves of Steel: Kyoko does not step away from danger, even when she's nearly killed by a desk or when she's confronted by the Madarai brothers. She also has the nerves to tell them that Ryoko Otonashi (actually, she's referring to Enoshima) has no idea about the incident.
- Not So Stoic: While normally composed even in extreme situations, Kyoko has difficulty to hide her emotions when she has her meeting with her father. She even shouts at him at one point. When he visits her in the infirmary, his decision to withdraw her from her task makes her visibly upset.
- O.O.C. Is Serious Business: Kyoko is untypically emotional when she's around her father. While it's true that her being an Emotionless Girl is a facade and it makes sense to drop that when she's talking to her family, but even then, it's very rare to see her being openly mad at someone, which establishes her complex feelings about her troublesome relationship with Jin Kirigiri.
- Saved by Canon: As the Deuteragonist of the first game, she obviously survives to the end.
- The Stoic: Her composure won't break even when watching a member of the Steering Committee get crushed with desks.
- "Well Done, Daughter!" Gal: While she wants to appear to be indifferent of her father's decision to withdraw her from the case, Kyoko doesn't want to admit that she's upset about it.
- Wham Line: She tells Ryoko Otonashi that Matsuda is involved with the murder of the Steering Committee members and he is most likely the Murasame's murderer, causing the other girl to snap.
- Your Head A-Splode: Ryoko Otonashi tries to do this on Kyoko, because the former mistakenly believes to have awakened hidden Psychic Powers. Of course, nothing happens.
A mysterious student who is believed to be the culprit behind The Worst, Most Despair-Inducing Incident in the History of Hope's Peak Academy.
- The Ace: His talent is basically talent itself. He possesses all talents and was made to be the "hope" of Hope's Peak Academy.
- Ambiguous Gender: The novel doesn't reveal his gender. Later installments confirm that he's male.
- Chekhov's Gunman: Zero doesn't reveal what his real role was regarding The Worst, Most Despair Inducing-Incident in the History of Hope's Peak Academy. He doesn't even appear in Zero. It's Danganronpa 2 where we finally know who he is.
- The Ghost: He is only mentioned by other characters. His whereabouts are kept secret and when Ryoko Otonashi and Kamishiro try to find him, they fail.
- Red Herring: He is believed to be the culprit behind The Worst, Most Despair-Inducing Incident in the History of Hope's Peak Academy. Kamishiro believes that isn't case. Danganronpa 3 reveals the truth.
- The Scapegoat: What Kamishiro thinks about Kamukura, that he's not the true culprit and merely a scapegoat for Enoshima.
- Superpower Lottery: He has every talent. The reason for this is because Hope's Peak Academy spent most of the money they got from the Reserve Course to "create" him and nurture him. This and the rumor that he killed the entire student council makes him the target of the Reserve Student's hatred and envy.
Ultimate Lucky Student
A random student Ryoko Otonashi meets at Matsuda's laboratory. An Ordinary High-School Student who is blessed with luck (or bad luck depending how you view it), he has enrolled to Hope Peak's Academy through sheer luck.
- Accidental Pervert: When he meets Ryoko Otonashi, she thinks that he's a pervert or someone suspicious. It takes a while for him to convice her otherwise.
- Determinator: By the end of chapter 3 in Book 2, he has a determined look in his eyes, which impresses Ryoko Otonashi.
- Dude In Distress: During Naegi's meeting with Ryoko Otonashi, he suddenly finds himself being taken hostage by Madarai. As Ryoko Otonashi refuses to be involved in that situation, he is then saved by Ikusaba.
- Hero of Another Story: Naegi is The Protagonist and The Hero in Danganronpa: Trigger Happy Havoc and Danganronpa 3: Future Arc.
- Forgotten First Meeting: Ryoko Otonashi doesn't remember him and she has no notes about him inside her notebook, but he remembers her before she became an amnesiac, which surprises the girl. However, she is confused and irritated that he's staring at her so much. The main reason for this is that he not only just remembers her, but he knows very well that Ryoko Otonashi is actually Junko Enoshima, and the reason why he's so perplexed is because of her new look.
- Masculine Girl, Feminine Boy: The way he is saved by Ikusaba invokes this trope.
- Nice Guy: Naegi coincidentally finds Matsuda's High School ID Card and goes to his laboratory to return it back to him. He also worries about Ryoko Otonashi.
- Ordinary High-School Student: Other than his luck, there is nothing really special about him. That's what Naegi and Ryoko Otonashi think, and she finds his ordinariness very strange. But then she realizes that he can have a determined look in his eyes.
- Unluckily Lucky: He happens to be a Hope's Peak's main student through pure luck, but since he is also an Ordinary High-School Student with no usable talent, he is unlucky that he has to go to school with elites who are leagues above him. He finds Matsuda's High School ID Card by lucky chance, only to not find the owner at the laboratory and he ends up being taken hostage by Madarai, but then he is lucky enough to be saved by Ikusaba at the right moment he's going to die.
A former member of infamous mercenary group Fenrir notorious for not receiving a single wound in her three years of service, Ikusaba is the older twin sister of Junko Enoshima and is working with her. She only appears in the second volume. She is also Naegi's classmate.
- Action Girl: As a female soldier she has to be this.
- Ax-Crazy: She has no problem with killing the majority of the Madarai brothers and is a member of her sister's despair based cult. Her small mental breakdown goes on to describe her eyes resembling that of swirls and spirals much like her sister, Enoshima, before she was executed, and other characters in the series who have fallen into despair.
- Big Damn Heroes: Saves Ryoko and Naegi from Madarai with a single knife throw.
- Child Soldier: Her Ultimate talent. She's the Ultimate Soldier.
- First-Name Basis: Being her older twin sister, Ikusaba calls Enoshima "Junko-chan".
- I Was Just Passing Through: She uses this as an excuse to justify why she happens to be at the scene when she saves Naegi from Madarai.
- Incest Subtext: Displays some rather... disturbing behavior when talking about her sister.
- Masculine Girl, Feminine Boy: This is invoked when and how she saves Naegi from Madarai.
- Saved by Canon: Being in the original game, Ikusaba naturally has this.
- Ship Tease: She has seemingly a crush on Naegi, which is later more exploit in IF.
- Super Speed: Shows this during her fight with the Madarai Brothers. Its a big hint to her impersonation of her sister.
- Tsundere: Her "I Was Just Passing Through" excuse towards Naegi and her little embarrassment indicate this.
- Twin Switch: Turns out that, as part of Enoshima's plan, she impersonated her sister.
- Yandere: Sibling based feelings; Everything she does, from murder to her sanity continuing to slip away, is out of love and devotion to her younger twin sister, Junko Enoshima.
Ultimate Student Council President
The head of the student council and one of two survivors of the original Mutual Killing game, having been rendered comatose by a head wound. He actually recovered a while ago, but has faked his continued condition out of shell shock. Matsuda eventually manages to get a reaction out of him and, upon realizing what Murasame knows, chokes him to death.
- The Faceless: His face isn't shown in the illustrations, something that contrasts with the other students who appear. His face is eventually revealed in Danganronpa 3.
- He Knows Too Much: Why Matsuda killed him.
- Madness Mantra: Starts screaming for Enoshima to be killed over and over before he dies.
- Obfuscating Disability: He isn't actually in a coma, though he still can barely think.
- Shell-Shocked Veteran: So much so that, after coming to, he's only referred to as "That thing".
- Sole Survivor: The only surviving member of the Student Council after the Tragedy of Hope's Peak Academy.
- Student Council President: His talent.
- Sudden Sequel Death Syndrome: Timeline-wise. In Danganronpa 3: Despair Arc, he's shown to have escaped the Tragedy and isn't mentioned in any later episodes. Zero happens between episodes 10 and 11 of that series.
- Walking Spoiler: His role reveals both what the incident everyone is talking about is and Matsuda's true motives.
The Real Junko Enoshima
Ultimate Despair/Ultimate Fashionista/Ultimate Analyst
The real personality of Ryoko Otonashi and lover of Yasuke Matsuda, Enoshima is driven by her plan to induce the world into despair, having locked the student council in the old school building and driven them to kill each other before indoctrinating the Reserve Course with the footage of the massacre. She deliberately gave herself amnesia as Ryoko Otonashi, both to test the ability to erase memories as well as grant herself ultimate despair. She succeeds, murdering her love Matsuda and stealing his research, all in her plan to create the true "School Life of Mutual Killing".
- The Bad Guy Wins: What do you expect when she's been our protagonist this whole time, and this is a prequel?
- Combo Platter Powers: This indicates that being the Ultimate Analyst is Enoshima's true talent, as her base personality Ryoko only has this trait of the three of them. Which does make sense as her being the Ultimate Fashionista sounded like it came from her predicting and acting on trends so she was always ahead of the curve, analyzing the fashion scene and acting accordingly. The relationship of her talent as the Ultimate Analyst to the Ultimate Despair isn't revealed here, but is in Danganronpa 3
- Dark and Troubled Past: Strongly implied by Ikusaba to have this.
- First-Name Basis: Only her older twin Ikusaba calls her "Junko-chan".
- Hidden Depths: The book is in a way retroactive about giving her this. To put it bluntly, its inferred that, minus the memory problems, Ryoko is essentially what Enoshima would have been like had she not become despair.
- Also, while she's still incredibly fucked up, Enoshima notably doesn't switch rapidly through personalities in the chapters from her perspective. This either means that she was acting during her appearance in Danganronpa: Trigger Happy Havoc, or that she suffered some more Sanity Slippage by the time of the events of that game.
- Insane Troll Logic: As the ending narration inclines, Enoshima's world view is self-contradictory, something that gives her further despair.
- Kill the Ones You Love: Does this to Matsuda before proceeding to beat his corpse to a pulp, reveling in the despair that came from killing one of the people she loved most personally.
- Mysterious Past: Everything about Enoshima and her history is contradictory. Namely, she claimed in the original game that she was born into despair, when both the things Ikusaba says concerning her and Ryoko's very existence infer this isn't the case. She also claims she caused the brain disease that killed Matsuda's mother, something that doesn't sound very plausible, given that she was around six years old when that happened and it flies in the face of both the flashback that dealt with that detail and her statement that her love for Matsuda was stronger than despair.
- Official Couple: With Matsuda, which is why she murders him; killing one's lover is major despair.
- Single-Target Sexuality: Going by a flashback, she's been in love with Matsuda since about the age of five.
- Villainous Breakdown: After murdering Matsuda, she flips out.
- Walking Spoiler: You literally can't state who she is without revealing the ending.