20th Century Boys/Characters

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Kenji and his former classmates

Kenji Endou

Otcho (Chouji Ochiai)

Yukiji Setoguchi

Yoshitsune (Minamoto)


  • Big Eater
  • Eyes Often Shut: More so as a kid.
  • Flashback Echo: He seems to develop post-traumatic stress disorder after the Bloody New Year's Eve.
  • Taking You with Me: Comes very, very close to doing this with Friend and a bomb. But remembering Kenji's words about not hurting innocents convinces him not go through at the very last minute.

Mon-chan (Masaki Shimon)



  • Animal Motifs: With the frog, both in looks and name ("kero" is the Japanese onomatopoeia for a frog's croak)
  • Badass Normal: Lacks the kind of training that Otcho has, but still rushes into a burning factory to save lives regardless of his burns.
  • Gonk: Sort of. Keroyon isn't hideous, but he has a very froglike visage.
  • Refusal of the Call: Ignores Kenji's request to stop Friend, and terribly regrets it.


Donkey (Saburou Kido)

Sadakiyo (Kiyoshi Sada)

Yanbo and Manbo


  • Creepy Child
  • Dead Person Impersonation: Takes up the mantle of Friend after Fukubei dies.
  • The Faceless: We never actually see his face before he underwent plastic surgery to look like Fukubei. In the virtual reality game, he simply has no face.
  • Freudian Excuse: Despite being even worse than Fukubei as Friend, he actually has one.
  • From Nobody to Nightmare: And how. In fact, it is because he was almost literally nobody that he became a nightmare.
  • Start of Darkness: Several factors lead to him to becoming the second Friend.

Other good guys

Kanna Endou

'God/Kami-sama' (Kamigama Kyutaro)

Shouhei Chouno



Kyoko Koizumi

Father Nitani

The Pope


  • For Science!: One of the primary reasons for making his giant robot: he thought the fake one was such a piece of crap that he felt obligated to make a real one.

Haru Namio

  • Chekhov's Gunman: Appears early on as a successful enka singer who works with Friend, Later revealed that he's protecting Maruo and helping the La Résistance covertly.
  • Stepford Smiler: Subverted when he turns out to be one of the good guys. Then you realize it's probably necessary to get close to Friend.
  • The Atoner: Left Kenji's band to join another and felt obligated to help him when the time comes.
  • Reverse Mole

(Other) Members and Allies of Friend's Cult


Police Officer Assassin

Prisoner #13 (Masao Tamura)



Moroboshi's killer

  1. To avoid spoilers, this will be listed separately from any other characters he may secretly be.