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If you're just following your mother's footsteps, I don't recommend it. Your distorted devotion will lead you to your destruction, Itsuki-chan. It's almost like a curse.

― Mudou warning his youngest quintuplet daughter about her decision-making affecting her future

Jinnosuke Mudou (どう じんすけ, Mudō Jinnosuke?) is the ex-husband of the late Rena Nakano and the biological father of the Nakano Quintuplets.


Mudou appears to be an old man; lacking hair on his head and his grown out, white-colored beard being his most apparent feature.


As the newfound father of the quintuplets, much of Mudou's identity has yet to be revealed, but he seems to have ever regretted his decision of leaving his daughters too many hardships. Stating that he wants to "atone" for his sins.

He holds some animosity towards Maruo Nakano because of allowing his quintuplet daughters to follow the same misguided path as did his late wife Rena Nakano.


  • The name Jinnosuke means "compassionate" (仁) (jin), "this" (之) (no) and "help, assist" (介) (suke).
  • Jinnosuke's surname Mudou means "nothing, naught" (無) (mu) and "hall" (堂) (dou).