!!Main Characters

!!!!!![[caption-width-right:350:[[labelnote:Click here to see him before the wasp]]http://static.tvtropes.org/pmwiki/pub/images/shionbrown.png]]
!!!Voiced by: YuukiKaji (JP), Creator/GregAyres (EN)

A boy raised among the elite of No. 6, only to be stripped of his privileges after giving shelter to Nezumi, a fugitive. He is unfailingly polite and idealistic and refuses to give up on saving the people of No. 6.
* {{Adorkable}}: Often.
* AdaptationDyeJob: His eyes were violet in the novels as opposed to the red in the anime and manga.
* [[spoiler: BackFromTheDead]]: [[spoiler:Only in the anime]]
* AmbiguouslyBi: Subverted. [[spoiler: Even though Shion promises to have sex with Safu after her two-year study program when she asks, the author made it clear in the novels that he [[JustFriends considers her nothing more than a good friend]]. It's even more apparent when you compare their interactions together to his with Nezumi, who he expresses ''much'' more interest in.]]
* BadassAdorable: He seems all cute and innocent on the outside, but mess with someone he cares about, specifically Nezumi, and get ready for the beatdown of your life.
* BerserkButton: Don't insult or even attempt to harm Nezumi in Shion's presence. It may very well be the last thing you do.
* {{Bishonen}}: Not on the same level as Nezumi, but he still qualifies.
* BrainyBrunette: Before the wasp, anyway.
* BreakTheCutie: The series tries hard, but Shion is too much a of [[ThePollyanna Pollyanna]] to give in. [[spoiler: It does finally hit him, and ''hard'' on the Correctional Facility, but even then and probably thanks to his {{Cloudcuckoolander}} tendencies he manages to go back to his old self with little negative repercussions]]
* ChildProdigy: Before meeting Nezumi, Shion was an ecology major in the city's gifted program with enough practical knowledge to safely suture wounds ''at the age of twelve''.
* [[spoiler:[[DidNotGetTheGirl Did Not Get The Guy Or Girl]]: Played with. Not only does Nezumi leaves him behind when the walls around No.6 come down, notwithstanding his disinterest in her as partner, his [[GayOption Het Option]] Safu AscendsToAHigherPlaneOfExistence. However, Nezumi and Shion ''did'' become the OfficialCouple, and Nezumi promises to come back to Shion eventually at the end of both the novels and the anime.]]
* DisappearedDad: Mentioned only in the novels. His mother claims he was a borderline alcoholic who slept around and spent recklessly.
** [[spoiler: ''Beyond'' gives more information. Also, Nezumi meets him.]]
* DiseaseBleach: The reason for his white hair.
* EvenTheGuysWantHim: Nezumi, of course, but he was also hit on by a greasy old corpse-collector, with promises of drinks and meat, no less.
* {{Fanon}}: Fanart of his "snake" spreading into his arms and both legs is common, but [[http://www.mangareader.net/no6/4/8 in fact]] only goes from his cheek (or neck in the novels) to his left ankle in a spiral.
* FriendToAllLivingThings: He took in the fugitive Nezumi and treated his wound when they were children, dooming his bright future in the process. Years later, [[CuteMachines Nezumi's mice]] take a liking to him (he even gives them names), he reads to the neighboring kids in the [[WretchedHive Western Block]], he gets along with Dogkeeper and [[AmbiguousGender their]] dogs, and Rikiga even calls him an [[TooGoodForThisSinfulEarth "angel"]] at one point.
** And at the end of the anime, he even [[spoiler: adopts the ridiculously cute baby he saved two episodes earlier.]]
* GeniusDitz : Even though Shion is naive and lacks a sense of self-preservation, he was ranked the highest in the city's intelligence test when he was just two-years-old.
* HoYay: With Nezumi. Invoked deliberately [[spoiler:and by the end, [[OfficialCouple confirmed]]]].
** [[spoiler:ChastityCouple]]: [[spoiler: For all the HomoeroticSubtext between the pair, their relationship was not portrayed as overtly sexual, at least in the anime and manga.]]
* LockedIntoStrangeness: After the wasp fails to emerge and kill him, his entire hair turns white and his eyes turn violet or red. However it doesn't happen right away, but over the time he is asleep afterwards. He also gains a [[GoodScarsEvilScars red snake-like mark curled around his body from his cheek to ankle]]. [[HoYay Not that Nezumi minds.]] He's a little freaked out by both changes and while he adapts quickly, he remains somewhat self-conscious about the "snake"
* [[spoiler: LoveMakesYouCrazy]]: [[spoiler:When Nezumi is threatened, Shion switches from sweet and naive to all-out rage or cold, rational and ''murderous.'']]
* MyGodWhatHaveIDone: He has a minor case of this any time he comes out of his {{Yandere}} outbursts. [[spoiler:Has a much more serious breakdown after killing a man who hurt Nezumi, but due to the extremely critical circumstances he manages to regain his cool rather quickly.]]
* MommasBoy: Well, his mom ''is'' Karan. Shion was raised solely by his mother and both of them are (happily) devoted to one another. That doesn't mean he is dependent on her though, and manages being away from her almost the entire story just fine.
* MoralityPet: For Nezumi. An unusual example in that he struggles with moral issues himself--[[spoiler: in fact, he becomes more willing to hurt others through his association with Nezumi, and the latter ends up having to serve as this for him in a sort of reverse MoralityPet effect.]]
* MeaningfulName: "Shion" is a flower (specifically, a type of aster) with medicinal value. The flower also means "I will remember you" or simply "remembrance" in Japanese tradition [[spoiler: which could allude to the ending.]]
* NiceGuy: To a fault.
** BewareTheNiceOnes: But there's a reason we keep saying ''not to screw with Nezumi.''
* ThePollyanna: No matter how grave the situation, Shion can very nearly always find the silver-lining, even after [[spoiler:being relegated to the equivalent of the slums for No.6, becoming targeted by the city, losing his mother and best friend, and discovering a massive government conspiracy. He finally breaks when Nezumi is shot, and it's ''horrifying'', but even then he manages to snap back at his usual self more or less quickly]].
* RedEyesTakeWarning: In the anime and manga. Averted most of the time. Threaten Nezumi, however, and [[ShmuckBait see what]] [[{{Yandere}} happens.]]
* [[spoiler:OOCIsSeriousBusiness]]: [[spoiler:It only happens 2 or 3 times in the entire story but anytime Shion is not his usual sweet, caring self nor is having any of his minor yanderish outbursts, it's outright [[http://blog.hachimitsu.org/wp-content/uploads/2011/09/HorribleSubs-No.-6-10-720p.mkv_snapshot_18.21_2011.09.10_20.34.19.jpg terrifying.]]]]
* [[spoiler: SingleTargetSexuality]]: [[spoiler:While the related materials do set up Safu as a nominal rival for Shion's affections, as stated above, the novels are pretty explicit about the fact that the ''only'' person Shion is interested in is Nezumi.]]
* SpellMyNameWithAnS: Shion/Sion.
* [[spoiler:[[ViolentlyProtectiveGirlfriend Violently Protective Boyfriend]]]]: [[spoiler:Do NOT insult or endanger Nezumi.]]
* WideEyedIdealist: He's more on the cynical side, but firmly believes that a bright future is attainable. [[spoiler: In the end, he's successfully helping to build that future]].
* {{Yandere}}: {{Downplayed}} since he lacks the crazy part, but he can get violent when Nezumi is on the line, even for minor, non-threatening issues.
** In the novels, [[spoiler: Shion is close to strangling a man because he tried to kill Nezumi. Only when Nezumi pleads with him to stop does he snap out of it. And then there's his explanation as to why:]]
-->[[spoiler: "That man tried to kill you, so he had to receive punishment."]]
** He also violently attacks Rikiga for simply making a pass at Nezumi and later [[spoiler: shoots a guard at point-blank range after he seriously injures Nezumi.]].

!!!Voiced by: Creator/YoshimasaHosoya (JP), Kalob Martinez (EN)

A cynical young man with a dark past. He was [[spoiler:saved by Shion when they were younger, only to return the favor years later]]. Due to his experiences in No. 6, he hates most everything about the city and its people, and is perfectly willing to watch it fall.
* ABoyAndHisX: With his mice.
* AttractiveBentGender: As his local theater was swift to notice, Nezumi makes a ''really'' good-looking woman.
* {{Badass}}: He's awesome personified in this world.
* {{Bishonen}}: Pretty enough to be hit on multiple times and [[spoiler: to [[WholesomeCrossdresser play in drag as the beautiful Ophelia]].]]
* CulturedBadass: His room is cramped with bookshelves filled with classical literature, and he's an actor by trade.
* TheCynic: ''Especially'' compared to Shion, though he does have moments where this is inverted later in the anime/manga.
* DarkAndTroubledPast
* DudeLooksLikeALady: He's a talented actor and performs in Shakespearean plays for a living. Shion first sees him playing Ophelia in {{Hamlet}}.
* [[spoiler: EasilyForgiven]]: [[spoiler:Shion was furious when Nezumi admitted that he was using Safu as an excuse to break in the facility for his own agenda. All is forgiven when Nezumi is seriously injured (only a few minutes after the revelation) and Shion rushes to heal him.]]
* EvenTheGuysWantHim: Shion being the main example. There is also [[spoiler: the two mooks who wanted "payment" from him after he kisses the prostitute]], and is also implied by Rikiga [[spoiler: when he offers Nezumi a job as a gigolo]].
* GrayEyes: Occasionally silver. Shion can hardly go without mentioning them.
* HoYay: With Shion. Invoked deliberately, and by the end, [[spoiler: [[OfficialCouple confirmed]]]].
** [[spoiler:ChastityCouple]]: [[spoiler: For all the HomoeroticSubtext between the pair, their relationship was not portrayed as overtly sexual, at least in the anime and manga.]]
* JerkWithAHeartOfGold: He can be a {{jerkass}} at the very least. But he also sings to Dogkeeper's dying pack members to ease their suffering, to say nothing of what he'll do where Shion is concerned.
* OnlyKnownByTheirNickname: For lack of a given name.
* [[spoiler: LastOfHisKind: Nezumi is all that is left of the Forest People that lived on the site where No. 6 was built.]]
* TallDarkAndSnarky: Oh yes.
* [[spoiler: MagicalNativeAmerican]]: [[spoiler:He can "hear" nature, and can sing a song of calming.]]
* [[MeaningfulName Meaningful Nickname]]: "Mouse" or "rat", a name given to him after [[spoiler:escaping the destruction of his homeland and the slaughter of his people.]] His real name is never revealed in-series.
** [[spoiler: He also goes by "Eve" when onstage. Two guesses as to who Adam is...]]
* RealMenWearPink: He's extremely tough and stoic, but also loves reading and singing, and [[WholesomeCrossdresser regularly performs in drag]].
* [[spoiler: ScarsAreForever]]: [[spoiler:The massive burn scars on his back are courtesy of the flamethrower-wielding No. 6 soldiers that slaughtered his people.]]
* {{Tsundere}}: Especially towards Shion. [[spoiler: He'll deliver an angry rant at No. 6, but the moment he sees Shion is upset he gently comforts him.]] Also, '''maybe''' towards Inukashi if you tilt your head and squint, though he'd probably die denying it.
* WhatBeautifulEyes: In the novel, Shion almost cannot mention Nezumi without talking about how beautiful his eyes are.
* WholesomeCrossdresser: As part of his acting job. He's very good at it, too.
* YouGottaHaveBlueHair: Blueish, grayish, off-purplish, depending on your point of view.

!!Residents of No.6

!!!Voiced by: KiyonoYasuno (JP), Creator/HilaryHaag (EN)

Shion's childhood friend and a fellow resident of No. 6. Like Shion, she's a child genius - her expertise is the human brain and to a degree, psychology. Also like Shion, Safu begins to show doubt about the utopia that is No. 6.
* AmbiguousDisorder: Often seems lost in social situations, such as [[DoYouWantToCopulate her proposal]] to Shion or cluelessness about romance when studying abroad. However, her behavior may just be a result of growing up as a sheltered child prodigy.
* [[spoiler: AscendedToAHigherPlaneOfExistence]]: [[spoiler:She becomes a physical medium for Elyurias.]]
* AdaptationExpansion: She is given a much larger focus in the Anime than in the original novels.
* BerserkButton: Go ahead, interrupt her presentation on the human mind or insult her grandmother.
* [[spoiler: BrainInAJar: Though it was never explicitly shown what happened to her body after the operation, we can be sure there was not much left of it (aside from her brain, perhaps...). As in the manga version Safu that Shion and Nezumi met in Correction Facility was merely a projection that "came to life", because Elyurias made her wish "I want to meet Shion one more time" come true.]]
* BrainyBrunette
* ChildProdigy
* DamselInDistress: [[spoiler: After being captured by the Bureau of Public Security. Turns into a DamselOutOfDistress when she uses Elyurias' power to help Nezumi and Shion by controlling the Correction Facility's computers, although her role consists less of kicking ass and more of standing around and looking kinda creepy.]]
* [[spoiler: HeroicSacrifice]]: [[spoiler:When Nezumi and Shion blow up [[MasterComputer Mother]], she stays behind with Elyurias in order to destroy it for good]].
* [[spoiler: IncompatibleOrientation]]: [[spoiler:The fate of her affections toward Shion.]]
* IWantMyBelovedToBeHappy: Tells Shion she's fine with him having a girlfriend while she's gone [[spoiler: and brings him BackFromTheDead (in anime only) while possessed by Elyurias before [[AscendToAHigherPlaneOfExistence Ascending to a Higher Plane of Existence]]]]
* NoSocialSkills: She functions well in No. 6, however she's seen as odd by her peers when she studies in No. 5. It certainly doesn't help that her request to Shion before she leaves to study abroad is "I want to have your sperm."
* SweaterGirl
* UnluckyChildhoodFriend: Shion flat-out states in the novels that while he treasures her as a friend, he does not and cannot return her romantic feelings. Aside from Shion's [[HoYay attachment to Nezumi]], circumstances just do not work in her favor.

!!!Voiced by: Creator/ReiSakuma (JP), Lesley Pederson (EN)

Shion's mother. With Shion, she was sent to live down in Lost Town where she opened up a bakery. She and Nezumi contact one another through strips of paper brought by mice.
* [[ChickMagnet Dude Magnet]]: She has a lot of admirers...
* FriendToAllChildren: Thinks children are adorable, and strongly believes it is an adult's responsibility to protect them.
* [[GoodParents Good Parent]]: She really loves Shion and isn't upset at all about their downgrade from a life of luxury.
* MysteriousPast: At least one photo of her exists with the Founding Members of No.6. She also knew where Rikiga was likely to be in the West Block.

!!!Voiced by: Creator/ShinichiroMiki (JP), Karl Glusman (EN)

One of the residents of No. 6, and a resistance fighter. Yoming first begins to suspect something is amiss in the city when his wife and child mysteriously disappear. He takes interest in Karan after Shion's disappearance.
* ConspiracyTheorist: Luckily (or unluckily), the conspiracy is ''real''.
* [[spoiler:KarmicDeath]]: [[spoiler:Though starting out with the intention of avenging his family's death, he eventually descends into creepy and unwanted advances on Karan and gleefully planning to incite a mob bloodbath on No. 6's founding anniversary. He ends as another victim of the birth of the wasp.]]

!!Residents of the West Block

!!!Voiced by: Creator/KeiShindou (JP), Creator/LuciChristian (EN)

One of the residents of the West Block outside of No. 6. Inukashi, quite literally "Dog Keeper," is a brash, often dangerous individual who spends their time either renting out their many dogs as heaters during the winter or smuggling in items to sell from an illicit contact within No. 6's correctional facility. They have a very violent, volatile relationship with Nezumi, but Nezumi still often goes to them to gather information - for a price.
* AmbiguousGender: ''Assumed'' by some to be female, based on their small stature, nice legs, and one mention of 'softness' when they were hugged, however official information does not give a definite answer one way or another.
** SamusIsAGirl: Treated by the other characters as male, until used as bait to lure in a No. 6 higher-up: Shion, trying to comfort Inukashi afterward, wonders if his friend might actually be a girl. The rescued baby from episode 10 also calls Inukashi "mama". Even so, Inukashi never personally discusses their gender identity, so there's no way to know.
* CrossdressingVoices: [[AmbiguousGender Sort of]].
* BerserkButton: Inukashi does not react well when their dogs, especially their 'mother', are insulted.
* MeaningfulName / OnlyKnownByTheirNickname: [[EveryoneCallsHimBarkeep Inukashi literally means "dog-keeper", or "dog-loaner".]]
* [[RaisedByWolves Raised By Dogs]]: Their "mother" was a dog that offered milk and kept them safe.
* {{Tsundere}}: Only towards Shion. Maybe, '''maybe''' towards Nezumi too. Shion thinks so, Inukashi - like Nezumi - would deny it to the point of death.

!!!Voiced by: Creator/MasakiTerasoma (JP), Chris Hutchison (EN)

One of the residents of West Block. He runs a prostitution service which allows him a life of luxury in comparison to other residents. At one point, he wrote articles regarding No. 6.
* CowardlyLion: He really ''doesn't'' want to get involved in Shion and Nezumi's plans, but does so anyway.
* [[{{Fangirl}} Fanboy]]: He really likes Eve, Nezumi's stage persona. He's less charitable towards Nezumi, given that well, it's [[{{Jerkass}} Nezumi]].
* IntrepidReporter: Hinted that the reason he was sent to live in West Block was due to his articles questioning No. 6's activities.
* ParentalSubstitute: He ''tries'' to be this to Shion from time to time, given that he's still attached to Karan.


!!!Voiced by: Mao Daichi (JP), Creator/GenevieveSimmons (EN)

A mysterious entity, subject to much research by the scientists of No. 6. [[spoiler:Elyurias once existed in the forest that was destroyed by No.6's operatives, and has power over nature. She was worshiped by the Forest People as a god. No. 6's government has gone to great lengths to research how to control her power.]]
* BeeAfraid: Elyurias occasionally appears as a giant one.
%%* BlueAndOrangeMorality
* GaiasVengeance: Unleashes this on the city during the ending.
* FaceFullOfAlienWingWong: Elyurias reproduces by laying eggs in the bodies of other species. Namely, humans. The process of a bee being born causes the host to rot away very, very quickly.
%%* MotherNature
%%* NatureSpirit
* SymbioticPossession: Though forcibly implanted into Safu, they do not seem to bear each other ill will.