[[folder:Juubei Kakei]]
!!! Voiced by: Creator/TakehitoKoyasu (Japanese), Brent Werzner (English)

Ban says it best: super-serious "samurai boy" who is Kazuki's best friend from childhood, and endlessly loyal and devoted to him (until Kazuki leaves and Juubei tries to kill him...). Blinded very shortly after being introduced, he works it almost into a DisabilitySuperPower. Works for Makubex now, unless Kazuki needs him for something. Fights with giant throwing needles. Nicknamed "Juubei of the Flying Needles", oddly enough.
* BattleButler: Fills this function for Makubex and Kazuki, whenever the latter needs him.
* BigDamnHeroes: He never fails to show up to aid Kazuki in times of trouble.
* BodyguardCrush: {{Fanon}}'s general opinion of his relationship with Kazuki. Considering their interactions... well, can't really blame the EstrogenBrigade.
* MaskPower
* MrFanservice: Hair in his eyes, great physique, HoYay-tastic devotion to his best friend and a damn [[Creator/TakehitoKoyasu sexy voice]]...
* NoSenseOfHumor: Juubei shows us what happens when you tell such a serious, no-nonsense character that he has no sense of humor—he is ''devastated'', and blames his inability to tell jokes for pretty much all of Makubex and Kazuki's problems.
* OfficialCouple: [[spoiler:In the alternate reality, he appears to be dating the 'girl' Kazuki, his childhood friend.]]
* {{Samurai}}: He's not ''really'' a samurai, but is named after one and the word is frequently used to describe him in-series. Definitely fits his outdated Code of Honour.
* TookALevelInBadass: His badassery took a massive jump in magnitude in the Get Back the Lost Time arc, where he can easily hold his own against the monsters of the Beltline and even defeats the [[spoiler:undead]] 13 Strings, the strongest retainers of the Fuuchouin, who were empowered by the black string curse.

[[folder:Haruki Emishi]]
!!! Voiced by: Mitsuaki Madono (Japanese), Judson Jones (English)

Friend of Shido's who stayed on as one of Makubex's lieutenants after Ginji left. Nicknamed the "Fresh Blood Joker" or "Bloody Joker" depending on your translation, he's another loyal to his friends type who reacts kinda murderously when the friends desert him. Thankfully, this is a one-time thing and he's usually perfectly content to play video games and make bad jokes. Fights with a strong-yet-pliable whip.
* BokeAndTsukkomiRoutine: Pulls a couple of these with Amon. It is awesome.
* ButNotTooForeign: Is implied to be a descendant of Luolan, which was once a kingdom in West China.
* ChivalrousPervert: Really does not appreciate poor treatment of women, but that doesn't stop him from snuggling Sakura-han's breasts when the opportunity arises.
* CoolShades: Both used and subverted. His pink sunglasses either increase his goofiness in lighthearted scenes or dehumanize him when he's justifying the nickname "Fresh Blood Joker".
* HighPressureBlood: high-pressure ''explosive'' blood.
* TheIdiotFromOsaka
* KansaiRegionalAccent: Possibly Kyoto, given his use of "-han" in place of "-san" (it's not as common in Osaka or Kobe).
* LastNameBasis: His given name is almost never mentioned beyond his initial introduction and a joke that thematically links him to Amon. It's bad enough that the writers at Tokyopop don't seem to have a clue which is which, calling him "Emishi Haruki" and "Haruki Emishi" at different points. In the same volume, even.
* [[spoiler:LastOfHisKind]]: [[spoiler:It is heavily implied by Emishi that the population of the Luolan tribe were all killed off by someone or some''thing'', though it's never stated what exactly happened. It was because of the loss of his home that he wound up at the Limitless Fortress in the first place.]]
* ManlyTears
* RapunzelHair: This doesn't apply to Emishi himself, so much as it does his ''whip''. It is made from the weaved-together tresses of Luolan women who spend their lives growing it out for use in weaponry.
* WhipItGood

[[folder:Sakura Kakei]]
!!! Voiced by: Yukiko Iwai (Japanese), Christa Kimlicko-Jones (English)

Juubei's older sister and Makubex's most trusted adviser... and that's about it, really. Still a good hacker and fights with the pink shawl-scarf she wears draped around her torso and as a headband.
* ClothingDamage: Poor girl gets into one fight in the whole arc and her clothes are burned off...
* CherryBlossoms: Subverted. Her name, unlike most Sakuras, does ''not'' mean this. The kanji used to write this Sakura's name mean "new moon/first day of the month" and "silk," as her ability is to manipulate cloth.
* LadyOfWar: On the very rare occasions she does fight, her favorite technique is calmly wrapping people up in her tapestry, usually with her eyes closed.
* MoralityPet: The only time Makubex loses his composure while acting as the arc's BigBad is when she gets hurt.
* OlderSidekick: She's 23 to Makubex's 14, and is just as loyal and devoted to him as her brother is to Kazuki.
* SatelliteCharacter: It is ''very'' difficult to find a scene of Sakura that doesn't somehow involve Makubex. Even if he's not in the room, she's probably thinking about him, admonishing others to obey him, or working on his computer. Even when she leaves the Limitless Fortress to [[spoiler:participate in the Underground Grand Prix for Kazuki's sake, she wears some kind of radio link so that she can speak to Makubex and send him information.]]
* ShipTease: She surprise-hugs Makubex sometimes, and she's quite pleased when Emishi brings her flowers.
* TeamMom

[[folder:Gen Radou]]
!!! Voiced by: Creator/MasaharuSato (Japanese), Greg Grosh (English)
Old guy who raised Makubex (and Ren) and introduced him to computers, and the architect of Babylon Tower. Has mysterious connections to the Brain Trust, so he probably ''knows things''.
* BadassBookworm
* BadassGrandpa
* LikeASonToMe: Makubex was this to him

[[folder:Ren Radou]]
!!! Voiced by: Yumiko Nakanishi (Japanese), Cassie Fitzgerald (English)
Cute little tomboy who has a cute little crush on Kazuki.
* {{Bifauxnen}}: Kazuki's DistaffCounterpart!
* {{Bokukko}}
* IntimateHealing
* TomatoInTheMirror: [[spoiler:When she tries to leave the Limitless Fortress to follow Kazuki, she is physically unable to do so—in fact when she attempts to simply stick her arm beyond the building, she sees it briefly go transparent—leading her to realize that she's just an artificial program created by the Brain Trust, just like [=MakubeX=]. In the anime, this sends her into a spiral of depression and nearly turns her evil in the final anime-only arc.]]

[[folder:Toshiki Uryuu]]
!!! Voiced by: Creator/KatsuyukiKonishi (Japanese), Jude Hickey (English)

Formerly one of Kazuki's friends and followers, he left because he thought Kazuki was too good for Ginji. Fights with his qi/chi/ki/what-have-you. Nicknamed "The Hell Knight".
* AmbiguouslyGay: Has a BodyguardCrush on Kazuki, and is the only man to kiss [[spoiler: Ban]]
* ArrogantKungFuGuy: In the anime, he's arrogant in the manga, but relies on his angel for fighting, which [[WhatTheHellMan Kazuki calls him out on]]
* AsTheGoodBookSays: Invoking Divine Design seems to require reciting passages of the Bible vaguely related to whatever it is you're doing.
* BlowYouAway: Due to his martial art training
* BodyguardCrush: As with Juubei, his mancrushing on Kazuki is {{Fanon}}, but still incredibly understandable fanon.
* DarkIsEvil: His angel
* TheDragon: To Lucifer
* TheGenericGuy: In all honesty, the series already had an honorable type of guy with a HoYay-tastic grudge against Kazuki. We're not sure why they thought they needed another one, but we're not complaining, either...
** Subverted in the manga, where he's a major {{Jerkass}} who abandons his martial arts for the power of angels
* IntimateHealing: Which makes him the only person in-series to kiss [[spoiler: Ban]].
* LastNameBasis: Kazuki is pretty much the only character who ever calls him by his given name, and in the manga, he seems to save it for particularly emotional moments.
* LightIsNotGood: His angel.
* KnightOfCerebus: In the manga he can summon one as well as a skeletal demonic centaur.
* ManlyTears: When fighting Juubei in the anime
* MoreThanMindControl: When working with Lucifer in the manga and [[spoiler: Masaki]] in the anime.
* NamesToRunAwayFromReallyFast: The Hell Knight.
* OurAngelsAreDifferent: His "angel resembles a skeletal hell knight centaur than an actual angel.
* OurDemonsAreDifferent: His demon knight centaur is considered an angel. He can also call out Cerebus.
* ReligiousBruiser: In the manga, some elements of this are in the anime.
* SatelliteCharacter: Would probably be pretty boring if not for his relationships with Kazuki and Juubei.
* SquishyWizard: Subverted as he knows martial arts, but chooses to rely on his angel more/
* VillainousBreakdown: A bit more dramatic in the anime.
* WellDoneSonGuy: To Kazuki

[[folder: Kaoru Ujiie]]
* AllLoveIsUnrequited: To Ratei/Ginji.
* CanonImmigrant
* CurbStompBattle: Both in the anime and manga by Ban and Shido respectively.
* DarkChick
* DeathSeeker: Wanted to die by Ginji's hand [[IfICantHaveYou if she couldn't have him]]. Anime only
* [[spoiler: ExoticEyeDesigns]]: [[spoiler: The cross eye stigmata]]...This is getting to be as bad as the [[{{Naruto}} Sharingan]] seriously!
* InstantAwesomeJustAddDragons: Their combined technique
** [[spoiler: [[TheWorfBarrage Didn't work on Shido]]]]
* MurderTheHypotenuse:[[spoiler: Try to kill Hevn so she won't cause Masaki to see the error of his ways]]
* PlayingWithFire
* TheRedBaron: Crimson

[[folder: Jouya Kanou]]
* BlowYouAway
** RazorWind
* CanonImmigrant
* CurbStompBattle: Both in the anime and manga by Ban and Shido respectively
* [[spoiler: ExoticEyeDesigns]]: [[spoiler: The cross eye stigmata]]...This is getting to be as bad as the [[{{Naruto}} Sharingan]] seriously!
* InstantAwesomeJustAddDragons: Their combined technique
** [[spoiler: [[TheWorfBarrage Didn't work on Shido]]]]
* MurderTheHypotenuse:[[spoiler: Try to kill Hevn so she won't cause Masaki to see the error of his ways]]
* PaperFanOfDoom
* TheRedBaron
* SmugSnake