- Arch Nemesis Dad: To Ban
- Authority Equals Ass Kicking: He rules the Belt Line between the Lower Level and Babylon City, said to be infested with powerful man like monstrosities
- Big Bad: Of the Voodoo Child Arc
- Big Bad Ensemble: With Kagami and Voodoo King in the final arc
- Dead All Along
- Disappears into Light
- Evil Counterpart: Has a more powerful version of Ban's snake bite.
- Evil Former Friend: To Paul
- Exotic Eye Designs: A cross in his left eye
- Heroic Sacrifice: As the bloodline of the Witch Queen has the capacity to produce the 1st key to Babylon City, it means that both he and his (then infant) son Ban are likely candidates and targeted by the Voodooists. When the Voodooo King came after him in the Beltline, Der Kaiser tore out his heart to become the key to avoid the King going after Ban.
- Hidden Agenda Villain: He wants Brain Trust destroyed, but for what purpose....
- Anti-Villain: A Type IV as he uses drastic measures in order to rebel against Brain Trust
- Hidden Heart of Gold: Though it's really because he's actually long dead. Der Kaiser loves his son and wants to help him overcome the Asclepius curse.
- I Have No Son!: "My son is a demon". It was not him who said it, but Ban's mother.
- Jerkass: He disowns Ban.
- Kick the Dog: Having Der Henker kill one of their own to piss off Ginji. Though what he truly aims for is to Ginji to turn on Raitei mode and black out Mugenjou, which will put the Archive out of operation, he doesn't mind that such act would really kill Raitei and Ginji and considers it a necessary sacrifice.
- Master of Illusion
- Mind Rape: His powers can do this as well
- Strong Family Resemblance: To Ban
- The Unfettered
- Villain Protagonist: Against Brain Trust, who wouldn't be
- Anime Hair: Both the father and son have this.
- Badass Bookworm: The elder sister looks like one.
- BFS: The older sister and brother have one.
- The Dragon: To Der Kaiser.
- Cool Sword: All of them have this.
- Curb-Stomp Battle: Paul trounces them all easily in both his young and older forms.
- They do this to Paul the first time around
Voiced by: Tomokazu Seki (Japanese, Natsuhiko), Akiko Kimura (Japanese, Yukihiko); Michael Morgen (English, both), Kaihiamal MartÃnez (Latin American Spanish, Natsuhiko), Manuel Bastos (Latin American Spanish, Yukihiko)
The childhood friend(s) of Ban. They're really seven siblings in one body (in the anime it's only two); the first one seems to have been Natsuhiko. The others include Hikage, Ukyou, Tsubaki, Tokisada, Yukihiko, and lone female Kirara. When they switch, their appearance changes slightly. They were led to believe that Ban killed their sister Eris, which made them become out for his blood. He did kill her, but in self-defense; she was being controlled by the Black Strings at the time.
The kicker is, she wasn't even their sister but their arranged-marriage bride-to-be. The seven siblings are actually only facets of a single person, who would merge into one upon reaching adulthood - merge into Yukihiko's "body", such as it is (but shh, they don't know that).
Their father, real older sister, and older brother were Drei Ritter/The Three Knights, guardians of Ban's father der Kaiser.
The image is of Natsuhiko Miroku.
- Adapted Out: All but Natsuhiko and Yukihiko in the anime.
- All Your Powers Combined: In their final confrontation with Ginji, all seven Miroku merge together into Yukihiko, who then has full access to their particular talents and abilities.
- Ax-Crazy: Ukyou
- Beware the Nice Ones: Yukihiko is easily the most dangerous.
- Big Damn Heroes: Pulls this to save Emishi from the Ura-Fuuchouinn.
- Blind Weaponmaster: Hikage
- Eyes Always Shut: Hikage, but mainly because he's blind.
- Confusion Fu: Ukyou who jumps around like an acrobat and wields a weird scimitar that's immune to electricity. In fact, the overall fighting style of the Seven could be called this. They fight by switching between personalities, bodies, and fighting styles in the middle of battle, changing things up on the fly so that if an opponent adapts to one of them, they simply switch to another to throw him off.
- Crazy-Prepared: Ukyou apparently, upon learning that Ginji would be one of their opponents, took the opportunity to switch to a weapon made from a nonconductive substance.
- Fragile Speedster: Kirara
- Gender Bender: Kirara especially when you consider that "she" is a facet of Yukihiko's personality
- Healing Factor: A weird variant where if one sibling takes a lot of damage then another taps in with none of the previous damage, while the damage taken by the previous one is released when they re-manifest.
- Iaijutsu Practitioner: Hikage.
- Katanas Are Just Better: All over the place as Natsuhiko wields a katana, but then there's Hikage who has a tsurugi, Tokisada has a nodachi, and Ukyou has a scimitar.
- Last of His Kind: The Drei Ritter died a long time ago serving Der Kaiser against the Voodoo King. With the unification of the seven personalities, Yukihiko is the last person of the Miroku bloodline.
- Lightning Bruiser: Natsuhiko who is as fast as Kirara but as strong as Tokisada.
- Literal Split Personality: Ginji describes the siblings as not simply being Disassociate Identity Disorder, but that are literally seven different people in one body (best exemplified with how the body changes according to the personality in charge). This is exemplified during the final arc where all seven personalities manifest into separate bodies.
- Smurfette Principle: Kirara is the lone female personality.
- Split Personality: Able to switch with each other in a fight. Turns out they're all personas of Yukihiko.
- Walking Armory: They carry around a huge bag in order to carry all their weapons.
- As Long as It Sounds Foreign: Das Nichts means "Nothingness"and Der Henker means Hangman
- Big Bad: Der Henker
- Blade Below the Shoulder: Help
- Body Horror: All of them
- Cool Mask
- Curb-Stomp Battle: Akabane completely annihilates one member before he got to do anything
- Himiko also defeats the next member before he gets to do anything
- Dark Is Evil: Der Henker
- Dude Looks Like a Lady: One or rather two is one
- Energy Absorption: Der Henker
- Fusion Dance: Two members combine into one Dude Looks Like a Lady
- He-Man Woman Hater: Das Nichts
- Humanoid Abomination: All of them
- Der Henker is borderline Eldritch Abomination
- Mask of Power
- Malevolent Masked Man: All of them
- Nietzsche Wannabe: Das Nichts
- No-Sell: Der Henker
- Politically Incorrect Villain: Das Nichts
- Reality Warper: Der Henker
- Space Master: Der Henker
- Talking the Monster to Death: How Himiko defeats Das Nichts
- We Hardly Knew Ye: All of them, especially Das Nichts and the Dude Looks Like a Lady
- Who Names Their Kid "Dude"?: Help
- Wolverine Claws