Zenji Amakusa is the spouse of Yoshino Amakusa and father to Ryō and Rio Amakusa. His given name combines the kanji 善 (zen, "virtue" or "goodness") and 次 (ji, "next"), while his surname, Amakusa, fuses 天 (ama, "heaven" or "imperial") with 草 (kusa, "grass"). Zenji’s presence is established through familial ties rather than physical descriptions, personality traits, or direct engagement in documented events. His role remains ancillary, rooted in his relationships to central figures rather than active plot participation. Official sources emphasize his status as a familial anchor without delving into personal history, character progression, or specific interactions across seasons, films, or spin-offs. His narrative relevance centers on his connections to others, lacking expanded arcs or detailed involvement in the series’ overarching developments.