Mansaku Jinnouchi

As the youngest son of Sakae Jinnouchi, this 68-year-old patriarch plays a vital role within the family dynamic. He is the dedicated father to Yorihiko, Kunihiko, and Katsuhiko Jinnouchi, maintaining close ties with his siblings. Beyond his familial duties, he remains deeply attentive to his parent's well-being, constantly monitoring Sakae’s ongoing health struggles to ensure they receive the necessary care and supervision.