Here are the chracter features in the anime/manga series ''[[Manga/LinebarrelsOfIron Linebarrels of Iron]]''. Beware of spoilers.

Contributions are most welcome.

[[foldercontrol]]

[[folder:Juda Corporation]]

! Koichi Hayase

->Voiced by: Creator/TetsuyaKakihara (Japanese) and Creator/JoshGrelle (English)

TheHero of the story, a bullied 14-year old kid who becomes Linebarrel's Factor.
[[hardline]]
* AccidentalPervert
* {{Badass}}: '''ESPECIALLY''' after CharacterDevelopment.
* BreakTheHaughty: And boy, does he get broken. Hard.
* ButtMonkey
* CannotSpitItOut: His feelings for Emi
* CluelessChickMagnet: The guy has four beautiful girls all after him... and yet, he only appears to be romantically interested in Emi.
* DeclarationOfProtection: Towards Emi, mostly. But despite not noticing the other girls' crushes, he's still quite protective towards all of them.
* FirstEpisodeResurrection: In the anime.
* HeroesPreferSwords: The main weapons of Linebarrel being [[DualWielding two]] [[KatanasAreJustBetter Katanas]].
* HotBlooded
* IdiotHero
* {{Jerkass}}: Before CharacterDevelopment (though with touches of JerkassWoobie)
** JerkWithAHeartOfGold: After CharacterDevelopment
* JumpedAtTheCall: Deconstructed. His behaviour in his first battles caused lots of property damage, as he lashes out towards anyone.
* MyGodWhatHaveIDone
* OrdinaryHighSchoolStudent
* ShutUpHannibal: To Kato [[spoiler:and, in the anime, to Masaki]].
* UnskilledButStrong: For the most part he just uses Linebarrel's extreme power to win. Although he can hardly be called a poor fighter, compared to Reiji's skillful swordsman ship he basically just wacks people with his swords as hard as he can and can't really use the Executor as anything other than a wide area single shot blast. He pretty much could not beat [[spoiler:Reiji]] straight up, without using modes B and C to overpower him. In the manga he's shown to be a flat out terrible pilot if he can't use Linebarrel. In one fight he needs to use a Jinrai (an Mass produced Arma that can match a Machina in the right hands), and he does more damage to the enemy by jumping out and punching it with his Factor enhanced strength than the Jinrai's weapons.
* UnstoppableRage: In response to [[spoiler:Yajima's death]]. And, towards the end of the anime, in response to [[spoiler:Emi's]].
* WhatTheHellHero: He receives quite a lot of these, especially at first.

!Emi Kizaki

->Voiced by: Creator/MamikoNoto (Japanese) and AlexisTipton (English)

A mysterious girl of about 14, who gives Koichi the power to use Linebarrel. [[spoiler:Somehow, she is also one of its Factors.]]
[[hardline]]
* BadassAdorable: A sweet girl who cares about her friends & Hayase [[spoiler: who also happens to be an even more experienced Factor than the hero, not to mention being the 2nd Factor of Linebarrel.]]
* CannotSpitItOut
* CatchPhrase: "You're the worst!" / "You make me sick!"
* ChainsawGood: Episode 6, though it's PlayedForLaughs
* ClingyJealousGirl: She's just as clingy and jealous as Risako. She just does a (slightly) better job at hiding it.
* CuteClumsyGirl: In the first few episodes.
* FishOutOfWater: "What's a Christmas party?"
** However in the Manga, she's aware of things like that, due to [[spoiler:Living in this era longer]]
* ItsAllMyFault: Mostly in Episode 15, as she thinks that it's her fault if [[spoiler:Juda has been scattered and people are dying to protect her.]]
* NakedOnArrival: Only in the anime.
* [[spoiler:ReallySevenHundredYearsOld]]: [[spoiler: Around 650+ years old.]]
* {{Tsundere}}
* TookALevelinBadass: [[spoiler:post timeskip she's sporting a shorter haircut, calling herself a "heroine of justice" and piloting Katou's Tsukyomi Arma.]]

!Reiji Moritsugu

->Voiced by: YuuichiNakamura (Japanese) and Creator/JMichaelTatum (English)

25-year-old Commander of JUDA's Special Task Force and Vardant's Factor.
[[hardline]]
* TheAce: In the manga, Hayase even stated that Moritsugu is the role model the he want to become.
* AcePilot: And how!
* {{Badass}}
* BloodKnight: [[spoiler: As a kid he would used to get into fights under the pretext of "being an ally of justice". A recent battle in the manga hints that he still has that tendency.]]
* CurbStompBattle: His first two fights with Koichi consist of nothing but him beating the crap out of the poor kid. [[spoiler:However, he gets on the receiving side of this trope in the anime when Emi gets in Linebarrel's cockpit]].
* DarkAndTroubledPast: [[spoiler: He grew up being raised by his sister and upon finding out he can't feel pain, starts getting into fights, and that eventually ends up getting him in trouble with the law]]
* [[spoiler:FakeDefector]]
* FeelNoPain
* GeniusBruiser: He's well educated about things, and quite a mastermind in the manga
* IAmNotLeftHanded: [[spoiler: One of Verdant's eyes appears damaged and when Koichi attempts to attack him from his "blind side", Reiji has the eye heal at that moment]]
* MundaneMadeAwesome: In the manga, he makes having a bunch of bags along his arms look quite dramatic. Koichi attempts to do the same and fails.
* JerkWithAHeartOfGold
* TheStoic
* StoicSpectacles
* TallDarkAndSnarky

! Kunio Ishigami

->Voiced by: Creator/JojiNakata (Japanese) and Barry Yandell (English)

An [[BunnyEarsLawyer eccentric]] old man and CEO of the JUDA company, [[spoiler:as well as the Factor of Juda in the manga]].
[[hardline]]
* BigGood
* BunnyEarsLawyer: Yes, the perverted guy who likes pranking people is the boss of a world-protecting organization, why do you ask?
* CoolOldGuy
* [[spoiler:DefectorFromDecadence]]: [[spoiler:From the Katou Organization]]
* [[spoiler:HeroicSacrifice:In the manga, to close the gate to the other world while the Human-Machina were trying to come out of it.]]
* ItAmusedMe: The reason for many of his pranks
* [[spoiler:KilledOffForReal]]: [[spoiler:In anime, by Reiji, and in the manga due to a HeroicSacrifice.]]
* [[spoiler:ReallySevenHundredYearsOld]]: [[spoiler:Around 70+ years old, old enough to participate in WorldWarII.]]
* [[spoiler:SacrificialLion]]: [[spoiler:Again, in the anime.]]

! Yui Ogawa

->Voiced by: Creator/SayakaOhara (Japanese) and TiffanyGrant (English)

Ishigami's 26-year-old secretery.
* BewareTheNiceOnes
* TeamMom

! Satoru Yamashita

->Voiced by: Creator/MiyukiSawashiro (Japanese) and Mary Morgan (English)

A 16-year-old member of the JUDA STF and Factor of Hind-Kind
[[hardline]]
* DudeLooksLikeALady: It doesn't help that he's voiced by women.
* HeroWorshipper: For Reiji. [[spoiler:So of course the poor kid goes in a complete HeroicBSOD when Reiji turns traitor...]]
* [[IllGirl Ill Boy]]: When he was younger. He got better after becoming a Factor.
* NiceGuy
* ShesAManInJapan

! Miu Kujou

->Voiced by: Creator/AyaHirano (Japanese) and Creator/MonicaRial (English)

A 16-year-old girl who is the Factor of Painkiller. In the anime, she is already a member of JUDA, whilst in the manga, [[spoiler:she is an idol singer, who decided to join in the mid parts of the storyline after Koichi saves her]].
* ActionGirl
* BadassAdorable
* BewareTheNiceOnes
* CanonImmigrant: Originally a character created for the anime, who eventually made it into the original manga, albeit with a completely different story and personality.
** Subverted: She was originally made for the manga, but the anime decided to introduce her much much earlier, using only the bare-bone early manga design notes as a base.
* EveryGirlIsCuterWithHairDecs: Her huge pink ribbon.
* GagBoobs
* HeroicBSOD: In the anime, after Masaki gives her a nasty TheReasonYouSuckSpeech, telling her that she's too weak to be a Factor.
* [[spoiler:HopelessSuitor]]: [[spoiler:Towards Koichi.]]
* [[spoiler:InterruptedSuicide]]: [[spoiler:In the manga, she was ready to jump off a building, until Koichi saw her and talked her out of it.]]
* NiceGirl: At least in the anime.
* ParentalAbandonment
* [[spoiler:RescueRomance]]: [[spoiler:About the one thing her anime self and manga self have in common is her falling in love with Koichi after he saved her (though in different ways).]]
* [[spoiler:SenpaiKohai]]: [[spoiler:After Koichi gets into high school, Miu turns out to his senpai. Ironically, sometime after they find this out, Miu becomes Painkiller's Factor, and she noted that this time, he's her senpai.]]
* [[spoiler:{{Yandere}}]]: [[spoiler:The manga version of her is... different. In fact, she's so fucked up in the head that Painkiller made her its factor believing she was dying. She finally snaps after Kouichi disappears when the TimeSkip happens.]]

! The Endou twins

A pair 14-year-old twins who are both Factors for Deceive.

* BrotherSisterTeam
* HalfIdenticalTwins
* ParentalAbandonment
* SavvyGuyEnergeticGirl

!! Shizuna

->Voiced by: Creator/KanaUeda (Japanese) and Creator/CheramiLeigh (English)

Izuna's loud and energetic older twin sister and a member of JUDA. She controls Deceives movements.
[[hardline]]
* ActionGirl
* BerserkButton: Do not call her "bobcut".
* ButtMonkey: Whenever the mood of the show turns comedic, it's often at her expense.
* CryCute: Normal Shizuna - a tough, aggressive tomboy who takes crap from no one. Crying Shizuna - a total and complete [[TheWoobie Woobie]].
* EveryGirlIsCuterWithHairDecs: Actually invoked when Koichi gives her his necktie holder as an hairpin. Shizuna's response is... [[LuminescentBlush quite spectacular]].
* GenkiGirl: Aw yeah!
* HotBlooded
* JerkWithAHeartOfGold: Beneath all that arrogance and bluster, Shizuna is actually a very warm person.
* KansaiRegionalAccent
* [[MySisterIsOffLimits My Brother Is Off Limits]]
* {{Tsundere}}: Bonafide Type A

!! Izuna

->Voiced by: Creator/RieKugimiya (Japanese) and Creator/AaronDismuke (English)

Shizuna's more reserved younger twin brother, also with JUDA. He controls Deceive's Never Crack cables.
* [[spoiler:AxCrazy]]: [[spoiler:In the anime, when trying to link with Central's HiveMind.]]
* BewareTheNiceOnes: After all, he's the one who controls the Deceive's Nerve Crack cables...
** [[spoiler: Also has a pretty dark side in the manga.]]
* DudeLooksLikeALady
* [[spoiler:KilledOffForReal]]
* [[spoiler:LaserGuidedAmnesia]]: [[spoiler: Thanks to Deceive's ability he doesn't remember his powers or how his father died.]]
* NiceGuy
* [[spoiler:{{Patricide}}]]
* TeenGenius: He does work with the Juda scientific personnel, after all. Though Rachel still outclasses him...
* [[spoiler:WithGreatPowerComesGreatInsanity]]: [[spoiler: He's a {{Seer}} but the fact that he can only see bad futures seem to have affect him mentally.]]
** [[spoiler:EnfantTerrible]]

! Rachel Calvin

->Voiced by: Creator/ChiwaSaito (Japanese) and Tia Ballard (English)

JUDA's 12 year old Chief of Research and Development. She mainly handle's the Machina's maintainance.
[[hardline]]
* ADayInTheLimelight: Episode 25 and a few pages in the Manga.
* AdorablyPrecociousChild
* CanonImmigrant: Subverted, along with Miu. The anime used things much earlier then they showed up in the manga with no real explaination.
* CryCute: [[spoiler: After Ishigami's death in the anime.]]
* GenkiGirl
* GirlishPigtails
* ImprobableAge
* InsufferableGenius
* LittleMissSnarker
* {{Meganekko}}

[[/folder]]

[[folder: Katou Organization]]

! Hisataka Katou

->Voiced by: Creator/JunFukuyama (Japanese) and Creator/ToddHaberkorn (English)

Terror syndicate Katou Organization's mysterious leader. He pilots the Arma Tsukuyomi. [[spoiler:Factor of the Shangri-La.]]
[[hardline]]
* AffablyEvil: Always polite and respectful, even to a bitter enemy.
* [[spoiler:AntiVillain]]: [[spoiler:[[WellIntentionedExtremist Type III]] on the [[SlidingScaleOfAntiVillains sliding scale]].]]
** [[spoiler:AntiHero]]: [[spoiler:Has shades of being this in the anime in addition to being Type III AntiVillain. Also seems to be be one after inheriting Ishigami's will.]]
* BigBad
** [[spoiler:BigGood]]: [[spoiler:After Ishigami's death.]]
* BlondGuysAreEvil
* BunnyEarsLawyer: A villainous example.
* TheChessmaster
* [[spoiler:CoolShip]]: [[spoiler:The Shangri-La is pretty much a huge spaceship.]]
* [[spoiler:EasilyForgiven]]: Subverted in the anime, [[spoiler:as Koichi does not forgive him for his crimes, but accepts to put his resentment aside and work with him for the greater good]]. Played straight in the manga, [[spoiler:where Koichi ''does'' forgive him, and even offers to help him. Admittedly, his goals in the manga are different from the anime.]]
* [[spoiler:HeelFaceTurn]]: [[spoiler:In the manga, he decides to try things the way his old friend Ishigami did, and leads the rest of his organization with the members of JUDA.]]
* [[spoiler:HeroicSacrifice]]: [[spoiler:In the anime.]]
* [[spoiler:KilledOffForReal]]: [[spoiler:Again, in the anime.]]
* [[spoiler:[[LukeIAmYourFather Emi, I Am Your Older Brother]]]]: [[spoiler:Anime-only. In the manga, he was her father's live-in assistant, though it is mentioned that a young Emi did see him as a brother of sorts (as well as considered part of the family).]]
* NonActionGuy
* RedEyesTakeWarning
* [[spoiler:SelfMadeOrphan]]: [[spoiler:At Amagatsus' request, no less.]]
* [[spoiler:WellIntentionedExtremist]]: [[spoiler:He wants to save the Earth from the other world's invasion by stirring people's imagination. The means he uses to do that, though, are quite debatable.]]

! Masaki Sugiwara

->Voiced by: Creator/SusumuChiba (Japanese) and Tony Patterson (English)

Factor of Glein-Neidr, [[spoiler:and, by extention, Naked]], and Captain of Katou's 1st Squad.
* AuthorityEqualsAsskicking: He's the top ranking captain of the Kato Organization, and also the best pilot.
* {{Badass}}: Repeat; best pilot and a heavy firepower machina.
* BreakingSpeech: He becomes fond of these as the ending of the anime comes close. They [[HeroicBSOD work]] on Miu but [[ShutUpHannibal not]] on Koichi.
* TheDragon: [[spoiler:To Katou in the manga. In the anime, he acts like he is, when in reality, he is this to Central.]]
** [[spoiler:TheLancer]]: [[spoiler:Since Katou has decided to become the BigGood in the manga, that would make Masaki this.]]
* [[spoiler:HeelFaceTurn]]:[[spoiler:In the manga, with the rest of the Katou Organization.]]
* [[spoiler:NeverGotToSayGoodbye]]: [[spoiler:The reason why he's so pissed off with Ishigami in the manga; he literally treated him like his own father, and is justifiably upset when he left them with no explanation immediately after mounting Juda.]]
* NiceHat
* PeekABangs: Justified in the anime. [[spoiler: He needs it to hide his cybernetic eye, which would reveal that he's a Machina Human.]] Not quite explained in the manga.
* SuperpowerLottery: The beam spamming heavily armored Glein Nieder is much much better than all the other Machina. Even Linebarrel can't dent it without help.[[spoiler:AND it has Naked inside it.]]

! Yasosuke Sanada

Captain of Katou's 2nd Squad. An old man who appears only the manga. He pilots the custom Arma, Tsuranagi.
[[hardline]]
* EvilOldFolks
* [[spoiler:KilledOffForReal]]: [[spoiler:By a betraying Sawatari.]]

! Soubi Nakajima

->Voiced by: Creator/HirofumiNojima (Japanese) and Creator/IanSinclair (English)

17-year-old Factor of Talisman whose story (and indeed, personality itself) depends on the medium. In the anime, he captains Katou's 2nd Squad in place of the manga-exclusive Sanada, who loves inflicting pain on others. In the manga, [[spoiler:he is the 72-year old leader of his village (having stopped aging at 17 due his being a Factor), who eventually decides to join JUDA's Special Task Force]].
[[hardline]]
* [[spoiler:ReallySevenHundredYearsOld]]: [[spoiler:In the manga.]]
* TheRival: In the anime, he's sort of one to Miu... or at least, he tends to single her out in battle. Miu doesn't reciprocate the enmity.
* ShockAndAwe: His Talisman's main weapon is an electrified lance.
* [[spoiler:SixthRanger]]: In the manga.
* [[spoiler:WhoWantsToLiveForever]]: [[spoiler:Again, in the manga.]]
** [[spoiler: MayflyDecemberRomance]]: [[spoiler:With his wife Kaoru. It ends [[TearJerker very sadly.]]]]

! Demitri

->Voiced by: Tomoyuki Shimura (Japanese) and Creator/KentWilliams (English)

31-year-old captain of Katou's 3rd Squad. He pilots the custom Arma, Kagutsuchi.
[[hardline]]
* BlankWhiteEyes: They're actually pretty scary.
* TheComicallySerious
* [[spoiler:StuffedInTheFridge]]: [[spoiler:He's killed rather uncerimoniously in order to draw out Sawatari's rage.]]
* VillainousFriendship: With Sawatari.

! Takuro Sawatari

->Voiced by: Creator/TetsuInada (Japanese) and BryanMassey (English)

22-year-old captain of Katou's 4th Squad. Pilots the custom Arma, Idaten. [[spoiler:Eventually betreays Katou, and becomes the Factor of the Machina, Lostbarrel.]]
[[hardline]]
* BadassNormal: Like most members of the Kato Organization.
* BloodKnight
* EvilCounterpart: [[spoiler:Lostbarrel to Linebarrel. Practically identical, but has one key feature different: unlike Linebarrel, Lostbarrel uses dual [[LaserBlade laser blades]]]].
* HotBlooded: Complete with HotBloodedSideburns.
* {{Jerkass}}
* [[spoiler:KarmaHoudini]]
* PetTheDog: His interactions with Demitri (and Soubi in the anime) bring out his better side.
* VillainousFriendship: With Soubi in the anime, and with Demitri in both continuities.

! Matt Reznor

Captain of Katou's 5th Squad who, like Sanada, only appears in the manga. He pilots the custom Arma, Kagaseo.
[[hardline]]
* [[spoiler:HeelFaceTurn]]: [[spoiler:With the rest of the Katou Organization.]]

! Jack Smith

->Voiced by: Yoshikazu Sato (Japanese), Creator/KenjiNomura (''VideoGame/SuperRobotWarsUX'') and Bob Carter (English)

32-year-old captain of Katou's 6th Squad. A samurai who needs to no Arma to fight: his body literally ''is'' an Arma!
[[hardline]]
* AntiVillain: Type IV on the [[SlidingScaleOfAntiVillains sliding scale]].
* {{Badass}}: Is there any way to deny it?
* [[spoiler:HeelFaceTurn]]: In the anime, [[spoiler:motivated by his desire to fight Reiji,]] and in the manga, [[spoiler:when Katou and JUDA joined together.]]
* HollywoodCyborg
* NobleDemon
* TheComicallySerious: He has quite an reaction to someone drinking his bottle of milk in the manga [[spoiler:after Katou and JUDA join forces]]
* TheRival: Considers himself to be Reiji's.
* RidiculouslyHumanRobot
* {{Robosexual}}: In the anime, he gets a huge crush on Risako.
** CanNotSpitItOut
* ScaryBlackMan

! Yurianne Faithful

->Voiced by: Creator/EmiShinohara (Japanese) and Michele Specht (English)

27-year-old captain of Katou's 7th squad. She pilots the custom Arma, Tsubakihime.
* BadassNormal: Can fight against with the best of the Machina in a technically weaker machine.
* BestBeerEver
* BoobsOfSteel
* ChainsawGood: Her Arma, the Tsubaki-Hime, has a couple of arm-mounted buzzsaws.
* DarkActionGirl
* EvilRedhead
* [[spoiler:HighHeelFaceTurn.]]
* MysteriousWoman
* TheVamp: Just ask Izuna...

! Riku Ousei

->Voiced by: Creator/DaisukeSakaguchi (Japanese) and Creator/SonnyStrait (English)

Psycho captain of Katou's 8th squad. He pilots the custom Arma, Yaoyorozu.

* BerserkButton: Don't make fun of his funny appearence... or, worse yet, say that he lacks imagination.
* FatBastard
* ForTheEvulz: He wants to show the world his capacity for imagination - which translates to blowing up major cities and killing as many people as he can.
* {{Gonk}}
* KilledOffForReal: In the manga after being defeated by [[spoiler:Emi as Satawari calls him saying that he's stepped out of line by Katou's standards right before Satawari's men finish him off.]]
* MadBomber
* TheNapoleon
* SmugSnake
* TheSociopath: God, yes.
* VillainousBreakdown: In the manga, he gets a pretty huge one when Kouichi presses his BerserkButton. And an even bigger one when [[spoiler:Emi defeats him in a CurbStompBattle.]]
* VillainousGlutton: Even when he's fighting Kouichi.
[[/folder]]

[[folder: Others]]

! Risako Niiyama

->Voiced by: Creator/NorikoShitaya (Japanese) and Creator/CarrieSavage (English)

ChildhoodFriend to Koichi and Yajima, who's had a [[ChildhoodFriendRomance crush on the former for long time]].
[[hardline]]
* ArmorPiercingSlap: Koichi often gets on the receiving end.
* ChildhoodFriendRomance: She has had a crush on Koichi for long time. Koichi cares a lot about her, but not the way she wanted. [[spoiler:After the TimeSkip, we find out she started going out with their other ChildhoodFriend, Yajima.]]
* ClingyJealousGirl
* GagBoobs
* IWantMyBelovedToBeHappy
* LockedOutOfTheLoop: And rather pissed about it.
* MiseryPoker: In the manga, though it's mostly PlayedForLaughs.
* PluckyComicRelief: In the manga, her role in the story declines to this.
* {{Tsundere}}: She's a Type B in the anime - mostly sweet and nice, but don't make her angry.

! Hideaki Yajima

->Voiced by: Go Shinomiya (Japanese) and Creator/JoelMcDonald (English)

ChildhoodFriend of Koichi and Risako, who's protected the former from bullies since they were kids. His death was a major turning point for Koichi. [[spoiler:He eventually comes [[BackFromTheDead back to life]] as the Factor to the Machina Apparition, and eventually joins up with his best friend.]]
[[hardline]]
* [[spoiler:BackFromTheDead]]: [[spoiler:As Apparition's Factor.]]
* BullyHunter: He's the one who protected Kouichi from bullies when they were little. [[spoiler:Deconstructed in the anime, as he was doing that mostly to look good in Risako's eyes.]]
* CanonImmigrant: Not him, [[spoiler:but rather, his piloting Apparition.]]
* ChildhoodFriendRomance: He has a crush on Risako. [[spoiler:While it was unrequited in the anime, the two do start dating in the manga after the TimeSkip.]]
* [[spoiler:FriendlySniper]]
* TheGwenStacy: A rare male example.

! Makoto Domyouji

->Voiced by: Jun Konno (Japanese) and Creator/JerryJewell (English)

A student at Koichi's school who is good at fighting and loves to flirt with cute girls. After being amazed at Linebarrel, he decides to join Hayase's group of friends (dragging along Furuya, who used to bully Koichi), dubbing them the "Hayase Corps." [[spoiler:Eventually pilots a custom Jin-Rai (a production model machine created by Kiriyama Heavy Industries intended to replace Arma, and possibly, JUDA's machina) and joins up the members of JUDA.]]
[[hardline]]
* AnimeHair
* {{Badass}}
** BadassBiker: Though the bike is borrowed from his dad...
** BadassNormal: Defeated an enhanced Kouichi without breaking a sweat.
* CasanovaWannabe
* ChivalrousPervert
* HilariouslyAbusiveChildhood
* JerkWithAHeartOfGold
* LargeHam
* WeakButSkilled: Only in regards to Factors and mecha combat. Compared to most people his age, he's both Strong AND Skilled.

! Eiji Kiriyama

->Voiced by: Creator/ShowHayami (Japanese) and Creator/VicMignogna (English)

Director of Kiriyama Heavy Industries, who as known Reiji since they were kids. [[spoiler:He is the Factor of Pretender.]]
[[hardline]]
* [[spoiler:TheAtoner]]: [[spoiler:In the manga.]]
* BigBadWannabe
* [[spoiler:DeathByAdaptation]]
* FauxAffablyEvil
* [[spoiler:HeelFaceTurn]]: [[spoiler:In the manga, he ends up joining the heroes after some offscreen character development to make up for all he's done.]]
* NotSoDifferent: Eiji is childish, arrogant and has a pathological need to be always right: pretty much how Koichi might have turned out had he not realized his mistakes.
* [[spoiler:RedemptionEqualsDeath]]: [[spoiler:What his fate would've been in the manga had Koichi not [[BigDamnHeroes saved him at the last second]].]]
* RivalTurnedEvil: For Reiji.
* SmugSnake

! Amagatsu Kizaki

Emi's father and Katou's master. [[spoiler:The creator of Machina and nanomachines. Was the original Factor for Linebarrel, and created the current Linebarrel and Lostbarrel.]]

* [[spoiler:ReallySevenHundredYearsOld]]

[[/folder]]

[[folder: [[spoiler:Central]] *spoilers for the anime adaptation*]]

! [[spoiler:CENTRAL]]

* [[spoiler: AIIsACrapshoot]]
* [[spoiler: BiggerBad]]
* [[spoiler: DeusEstMachina]]
* [[spoiler: HiveMind]]
* [[spoiler: YouWillBeAssimilated]]

[[/folder]]

[[folder: [[spoiler:Human Machina]] *spoilers for the original manga*]]

! [[spoiler: Human Machina]]

! [[spoiler: Deus Ex Machina]]

[[/folder]]