[[folder:Main Characters]]

!! Ryôta Sakamoto
->'''Voiced by:''' Kanata Hongo (Japanese), Tyler Galindo (English)
* AboveTheInfluence:
** When he defeats Himiko with her own stun gun, he's aroused by how good she smells and is barely able to resist temptation... not without giving us a PantyShot first, of course. In the manga, he goes a bit further by lifting her skirt and actually touching her on the crotch before pulling her skirt back down and reprimanding himself.
** In the final episode, [[spoiler:he kisses Himiko and it seems things are going to go a lot further between them. Even though she lays down on the couch and is not actively resisting him, he knows her UsefulNotes/{{Consent}} is very dubious, and this time he solidly refrains from doing anything further.]]
* AbusiveParents: His mother nominated him to go to the island, though in fairness he was quite abusive to her as well.
* ActualPacifist: At first.
* AdultChild: Prior to the series, he's a 22-year old self-centered NEET prone to temper tantrums and leeching off his parents. He becomes much more mature as the series goes on.
* BattleCouple: With Himiko.
* {{Bishonen}}
* CharacterDevelopment: Becomes much more selfless and mature as the series progresses.
* ChronicHeroSyndrome
* CovertPervert
* CrouchingMoronHiddenBadass: Quite badass for a guy who [[{{Neet}} spends all day playing videogames.]]
* {{Cuckold}}: [[spoiler: The entire situation with him, Oda, & Aiko in his high school days.]]
* DisneyDeath: After his first confrontation with [[spoiler: Miyamoto.]]
* TheHero
* HeterosexualLifePartners: Was this with Oda on their high school days, but it all went to hell when [[spoiler: Oda slept with the girl Ryota had a crush on.]]
* HorribleJudgeOfCharacter: Unlike Himiko, he trusted Date right away… Though Himiko suspicions didn't start getting raised until after he detonated a remote bomb next to her and tried to play it off that he was saving her from Hidemi.
* IdiotBall: For someone who was supposed to be a high-ranking player in the bomb-centered online game, it sure takes him a long time to figure out things which should be readily apparent. He doesn't recognize that the things in his bag are bombs, and somehow doesn't realize that the timer was counting down to an explosion, only throwing it away because 'he had a bad feeling'. Even after he figures it out, he still doesn't understand how to actually use them, such as ''not pressing the button'' when throwing it at the psycho chasing him across the island, and being shocked when it doesn't explode.
* IKnowMortalKombat
* ItsAllAboutMe: How he was prior to the series. Major component of his CharacterDevelopment was realizing this and growing out of it.
* JerkassRealization: Comes to realize how self-centered he was at the beginning of the series and attempts to change himself.
* {{Neet}}: Before the start of the series, he would just spend all day playing video games.
* PragmaticHero
* TookALevelInKindness: Becomes dramatically nicer than he was prior to the series.
* TranquilFury: Notably when he fights Miyamoto and Natsume. He even comments on it later to Himiko.

!! Himiko[[spoiler:/Hemilia]]
->'''Voiced by:''' Creator/SuzukoMimori (Japanese), Creator/BrittneyKarbowski (English)
* ActionGirl
* AllOfTheOtherReindeer: Her desk at school even had written "Die" and "Betrayer" on it.
* AttemptedRape: Went through this ''twice''.
* BattleCouple: With Ryouta.
* BarbieDollAnatomy: During the opening credits.
* BewareTheNiceOnes: If you're a man and get anywhere near her without her approval, don't expect her to have any mercy.
* BreakTheCutie
* BrokenBird: She saw [[spoiler:her friends raped, betrayed by them in retaliation, and narrowly escaped two attempted rapes.]] Probably the best thing that happened to her so far is meeting Ryouta.
* ClosetGeek: Likes cosplaying and gaming, but she's not about to admit it to people she doesn't know.
* DamselInDistress: Although there are moments where she shows herself to be capable, she frequently needs to be saved by Ryouta, such as when she is [[spoiler:kidnapped by Miyamoto and Natsume.]]
* DoesNotLikeMen: Her [[AttemptedRape previous experiences]] led her to distrust and fear men. Meeting Ryouta warms her up a bit, but only towards him; she remains the same towards other men. Even then she was still extremely distrustful of Ryouta; it was only after he risked life and limb to [[RescueRomance save her from Miyamoto]] that she began to be comfortable around him.
* DontYouDarePityMe
* FanserviceCover: Pretty much every cover with her on it.
* FirstNameBasis: Shortly after Ryouta rescues her from Miyamoto, she starts calling him by his name.
* GamerChick
* HairOfGoldHeartOfGold
* HatesBeingTouched: By men, that is.
* MsFanservice: Most of her panel time consists of some action (usually bad for her) that will force a suggestive pose on the girl; while grovelling in pain or fainting, Himiko will have her bosoms, legs or bottom in great view for the reader.
* OnlyKnownByTheirNickname: Himiko is just her username at an online game. [[spoiler: It is later revealed that her real name is Hemilia.]]
* RapeAsDrama: Her reason for being sent to the island. [[spoiler:She and some friends met with an upperclassman. Turns out they were a bunch of rapists. Himiko barely escapes them. Unfortunately, the same couldn't be said for her friends. They blamed her for running away and nominated her for the game.]]
* ShrinkingViolet: Thanks to Ryouta, she's becoming more self-confident, but she still fits the trope to a T.
* StunGun: Carries a taser.


[[folder: Survival Game Players]]

!! Kiyoshi Taira
->'''Voiced by:''' Creator/ToruOkawa (Japanese), Creator/AndrewLove (English)
* AntiVillain: [[spoiler:In the end, his betrayal was brought about by him wanting to see his family again. He was never a bad man, just a very desperate one.]]
* BadBoss: He admits that's probably the reason why he was sent to the island, saying that while he was good to his family, he was a ''monster'' at work.
* BetterToDieThanBeKilled: [[spoiler:He does this to avoid being eaten alive by the komodo dragons, and partly to not slow down Ryouta any longer after he realizes the latter was still trying to help despite attacking them moments earlier.]]
* BigFun
* TheBigGuy
* ButtMonkey: Nothing ever seems to go right for poor Taira, and is on the end of a lot of injuries. [[spoiler:He twisted his right ankle. Then a Komodo dragon, whose bite is highly infectious, bit him and he spent a few days having a fever. Then he had his fingers sliced off by a KnifeNut.]] All in about 10 chapters, and it never gets better for him.
* CowardlyLion: Despite being understandably terrified, he was always trying to be a good man [[spoiler: ultimately his paranoia got the better of him.]]
* DrivenToSuicide: [[spoiler:In his final moments he finds himself surrounded by komodo dragons. He decides to put his last bomb to use.]]
* FaceHeelTurn: [[spoiler:A very tragic one brought by his own CowardlyLion tendencies that ultimately drive him insane.]]
* {{Fingore}}: In the fight with Miyamoto, he gets his fingers cut by him.
* HappilyMarried: He loves his family dearly, and wishes to get off the island so he can see them again.
* TheLoad: He tries to avoid it, but ultimately he becomes this after [[spoiler:getting bitten by a komodo dragon, as he can't really do anything except rest and recover. One of the reasons he kills himself is because he doesn't want to slow Ryouta down.]]
* MadBomber: [[spoiler:At the end of the anime.]]
* MrExposition: He fills in for this during episode 3, telling Ryouta what happened on the plane ride to the island. He tells Ryota about how he was the most adamant against the game, causing the guards on the plane to taser him right in the head, which explains the blood on his head as well as his short term memory loss back in episode 1.
* PleaseDontLeaveMe: Taira begs Ryota not to leave him when the latter goes off to look for a [[spoiler:kidnapped Himiko]] in episode 7. Ryota didn't like it, but he had little choice.
* SanitySlippage: [[spoiler: After Ryouta leaves him behind repeatedly.]]
* WoobieDestroyerOfWorlds: [[spoiler:Sure he goes insane and tries to kill Ryouta, but its not hard to see why the pressure would get to him.]]

!! Kousuke Kira
->'''Voiced by:''' Creator/MiyukiSawashiro (Japanese), Chelsea [=McCurdy=] (English)
* AbusiveParents: His father abused him pretty badly. The result of the abuse was [[SanitySlippage not good]].
* AxCrazy: ''Laughs'' after killing his own father, and overall shows a psychopathic glee towards the idea of killing people.
* {{Bishonen}}
* CreepyChild: Oh, so much.
* CuteAndPsycho: He can actually appear to be a fairly cheerful kid. Then you find him gleefully squashing frogs for fun, laughing after killing his abusive father, and hear about his disturbing back story.
* DeathSeeker: He does not mind death, if it's Ryota who kills him.
* FreudianExcuse: His father's abuse.
* ILoveTheDead: He killed three women previous to the survival game start. ''Then'' he raped them.
* KidsAreCruel[=/=]TeensAreMonsters: He's quite the psychopathic nutjob for a 14 year old.
* LaughingMad: Right after making his father [[TheDogBitesBack explode]].
* MadBomber
* TheMentallyDisturbed
* RapeAsBackstory: His father did not just abuse him physically...
* SanitySlippage: At some point before the story, he snaps and kills and rapes three women. And the only thing that keeps his insanity at bay is the fear of his father and well... [[SelfMadeOrphan that does not end well...]]
* SlasherSmile
* SelfMadeOrphan
* {{Tykebomb}}
* WiseBeyondHisYears: It's hard to remember sometimes that he's only 14.
* YoureInsane: He gets this from Natsume, his lawyer, after killing his father.

!! Nobutaka Oda
->'''Voiced by:''' Creator/YuuichiNakamura (Japanese), Crash Buist (English)
* TheAce: Ryota notes that he was always the best at everything, whether grades or sports, and was extremely popular with his peers.
* {{Bishonen}}: Mostly on high school flashbacks.
* BrokenAce
* ChickMagnet: According to Ryota, he attracted the attention of a lot of women. He even worked at, and eventually ran, a host club.
* CoolShades: He combines these with a tattoo, fuzzy facial hair, and cavalier attitude for maximum coolness.
* HeterosexualLifePartners: Was this with Ryota on their high school days, but it all went to hell when [[spoiler: he slept with the girl Ryota had a crush on.]]
* MadBomber
* PermaStubble
* TattooAsCharacterType

!! Masahito Date
->'''Voiced by:''' Creator/KenNarita (Japanese), Creator/DavidMatranga (Engish)
* BattleCouple: Was this with [[spoiler: Shiki]] before betraying her.
* BitchInSheepsClothing: Pretends to be a polite and friendly doctor concerned for everyone's well-being, but he actually holds nothing but contempt for damn near ''everyone'', and will betray you in a heart-beat.
* [[spoiler:BoomHeadshot]]
* ChronicBackstabbingDisorder
* DeadlyDoctor
* EasilyForgiven: By, of all people, the woman who he ends up betraying ''three times''!
* FourEyesZeroSoul
* HoistByHisOwnPetard: [[spoiler:While he isn't killed by it, Date is brought down by his own trap after Ryouta managed to move it without him knowing.]]
* {{Jerkass}}: Under his [[BitchInSheepsClothing friendly façade]] is a spiteful man who spends three quarters of his inner monologue insulting everyone.
* MadBomber
* ManipulativeBastard: In the first game, [[spoiler: he used Shiki to commit the kills and then took her arm, abandoning her on the island.]] On his second time on the island, he's not much better either...
* TheMedic
* MorallyAmbiguousDoctorate: So morally ambiguous that he was [[spoiler:sent to the island ''twice''.]]

!! Shiki Murasaki
->'''Voiced by:''' Creator/RikaFukami (Japanese), Maggie Flecknoe (English)
* AxCrazy: Being stuck on an island for a survival game for six months does that to you. She does this more often than not for mere intimidation value, though, as she doesn't want anyone to stay near her shelter.
* BattleCouple: [[spoiler: In the previous game, she was this with Date, but then he betrayed her.]]
* BlindingBangs
* DoesNotLikeMen
* GirlWithPsychoWeapon: Her weapon of choice is a Kama.
* IWasQuiteALooker: Before the survival game started. She's not even 40 yet, but losing an arm and spending 6 months living alone on the island sure did a number on her.
* LoveMakesYouDumb: Her crush on Date caused her to [[spoiler: be kicked out of the hospital she worked at for covering for him, and later in the survival game, she trusted him again... only to be betrayed by him ''again''.]]
* TheMedic
* WeaponOfChoice: Her Kama.
* YouHaveOutlivedYourUsefulness: [[spoiler: Date attempts to kill her (and believed to have done so) after he callects enough shards to leave the island.]]

!! Masashi Miyamoto
->'''Voiced by:''' Creator/TakayaKuroda (Japanese), Jovan Jackson (English)
* AwesomeMcCoolname: Just one vowel away from UsefulNotes/MiyamotoMusashi.
* BodyHorror: [[spoiler:After Himiko manages to set off a gas bomb he was carrying on a bandoleer, his skin starts to ''melt off''. It's not a pretty sight, and it still wasn't enough to get away from him.]]
* ColdBloodedTorture: Planned to do this to [[spoiler:Himiko, such as stripping away her skin and seeing how long she can survive for.]] Thankfully he doesn't have the time to enact it.
* {{Determinator}}: [[spoiler: Survives having his Blazing Gas BIM triggered by Himiko, and was still trying to disarm the Timer BIM before he died.]]
* {{Expy}}: He's basically an evil ''Franchise/{{Rambo}}''.
* ForTheEvulz: When he and Natsume [[spoiler:capture Himiko, she begs them to kill her quickly, promising not to resist, in exchange for them not raping her.]] Miyamoto says he doesn't have any plans for that, but instead wants to [[spoiler:torture her, just for the hell of it.]]
* HoistByHisOwnPetard: [[spoiler:The Timer BIM he tells Natsume to set to three seconds is the one that ultimately does him in because he couldn't throw it away in time.]]
* KnifeNut: And it's his WeaponOfChoice. It also gives him an advantage, since he isn't restricted to using [=BIMs=] to fight.
* ScarilyCompetentTracker: Initially gives him a huge advantage in the game. As he is familiar with jungle survival, he doesn't need to use the radar to track his opponents effectively.

!! Hidemi Kinoshita
->'''Voiced by:''' Creator/YokoHikasa (Japanese), Creator/ShelleyCaleneBlack (English)
* [[spoiler:BoomHeadshot]]
* [[spoiler:GoOutWithASmile]]
* ForeheadOfDoom
* HeroicSacrifice: [[spoiler:Also doubles as a DyingMomentOfAwesome since after getting ''shot in the head, in her leg, AND two more times in the chest'' she uses the bomb Ryota gives her to kill the pilot while [[FlippingTheBird flipping the bastard off]].]]
* MsFanservice
* PipePain
* TisOnlyABulletInTheBrain: [[spoiler:She get's shot at point blank range and she's ''still alive''.]]

!! Souichi Natsume
->'''Voiced by:''' Tooru Nara (Japanese), Patrick Poole (English)
* AxCrazy: He wasn't at first, but he develops this by Episode 7. He starts spouting off a self-defense law so as to avoid being charged for murder and to justify him killing people.
* SanitySlippage: Was actually fairly pacifistic at first, expressing disapproval over Kousuke's sadistic tendencies. When he shows up again after [[spoiler:teaming up with Miyamoto]], he's clearly lost his mind, and developed his own sadistic side.
* YoureInsane: To Kousuke after he kills his abusive father. Natsume abandons him, insults him, and then claims Kousuke to be no better than his father.

!! Mitsuo Akechi
->'''Voiced by:''' Yasuhiro Mamiya (Japanese), Mark Laskowski (English)
* AttemptedRape: Attempts to rape Himiko, and is then killed for it.
* BitchInSheepsClothing: Seemed like the most decent member of his group when he was introduced, but he showed his true colors once he was alone with Himiko.
* FatBastard: While at first he ''seems'' like a pretty decent guy for the most part, after escaping from Miyamoto with Himiko, the stress makes him snap, and he attempts to sexually assault her.

!! Yoshiaki Imagawa
->'''Voiced by:''' Tooru Nara (Japanese), Joshua Sheltz (English)
* {{Delinquent}}: Was this before the island.
* FunctionalAddict: Addicted to pills, but still managed to keep Ryouta on the run for most of their fight.
* StarterVillain: For Ryouta.

!! Yoshihisa Kira
->'''Voiced by:''' Creator/HisaoEgawa (Japanese), Creator/ChrisAyres (English)
* AbusiveParents: Towards his son, Kousuke, both physically and sexually.
* AssholeVictim: He was a complete asshole who deserved what he got.
* {{Jerkass}}: Even putting aside his horrendous abuse towards his son, he is a ''massive'' asshole who enjoys intimidating smaller opponents into submission.

!! Isamu Kondou
->'''Voiced by:''' Yasumichi Kushida (Japanese), Parke Fech (English)
* BadassTeacher: A kind, responsible middle school teacher with a muscular build and a sixth degree black belt in Judo. [[spoiler: Somewhat subverted when his strength and skill fail to protect him from an unexpected dagger to his throat.]]
* InformedAbility: He mentions having a black belt in Judo, and his rugged physique certainly suggests he's pretty athletic. But [[spoiler: Masashi slits his throat before we see if he can back up his claims.]]
* NamedAfterSomebodyFamous: Like most of the cast, he's named after a figure from Japanese history. In this case Isami Kondo, commander of UsefulNotes/TheShinsengumi.
* ReasonableAuthorityFigure: Tries to be this for his group, lecturing them on the importance of rationing supplies.
* TheIdealist: He espouses morality, civility and pacifism on an island where everyone is trying to blow each other to smithereens.
** "I'm a teacher! No matter the situation, we will do what's right and just!"
* [[spoiler:SlashedThroat: How Miyamoto kills him.]]

!! Misako Hojo
->'''Voiced by:''' Mai Tōdō (Japanese), Brittany Deans (English)
* WeHardlyKnewYe: She's killed by Oda in her very first scene.

!! Heitaro Togo
* TheLeader: Of his alliance.
* ParentalSubstitute: A better father figure to Kousuke than [[AbusiveParents Yoshihisa]] ever was.
* PetTheDog: He treats Kousuke respectfully.

!! Kenya Uesugi
!! Shigemasa Kusunoki
!! Yoko Higuchi


[[folder: Other characters]]

!! Miho
->'''Voiced by:'''Creator/ShioriMikami (Japanese), Margaret [=McDonald=] (English)
* ACupAngst: Miho feels quite... small compared to Himiko.
* BrokenBird
* GenkiGirl
* {{Meganekko}}
* RapeAsBackstory
* TheReasonYouSuckSpeech: Delivers one to Himiko before [[spoiler: enlisting her to the ''Btooom!'' real-life game.]]

!! Yukie Sakamoto
->'''Voiced by:''' Ayumi Kida (Japanese),
* AbusiveParents: [[spoiler: Signs up her own son for the Btooom! game]]. Although she gravely regrets this. To be fair, he wasn't exactly the nicest son to her.
* BathSuicide: She attempted to [[spoiler:kill herself by slitting her wrist in the bathtub when the full horror of the fact she basically sold off her son to die in a DeadlyGame hit her.]]
* ButtMonkey: Her first marriage goes down the drain as her husband is constantly at work. When she remarries, her son throws a temper tantrum and assaults his step-father. Then her son becomes a jobless NEET while her new husband gets laid off from work. [[spoiler: This all contributes to her nomination of her own son, which she ends up greatly regretting.]]
* DrivenToSuicide: [[spoiler:After sending her only son to the island.]]
* DullEyesofUnhappiness: Practically every time she's on screen.
* MyGodWhatHaveIDone: Shows great regret after [[spoiler:nominating her son for the real life Btooom! game, as she tried to kill herself in repentance.]]