Tomoyo Aragaki was the deceased wife of protagonist Jotaro Aragaki and mother to Rei Aragaki. Her death preceded the series events, leaving her presence felt primarily through memories and backstory. As a former actress, she attained significant fame during her lifetime, though specifics of her career remain unstated. Her relationship with Jotaro produced their daughter Rei, who was very young when Tomoyo died. This loss deeply affected the Aragaki family, profoundly influencing Rei's growth. Following Tomoyo's passing, Rei committed to managing household responsibilities, emulating her mother's role and demonstrating Tomoyo's lasting impact on the family. Tomoyo's legacy endures through Rei's admiration and Jotaro's reflections, though her onscreen appearances are confined to flashbacks or mentions. Her character receives no narrative development across any official media, including spin-offs, movies, or OVAs, as her storyline remains anchored in pre-series events. Her given name Tomoyo reflects meanings of "knowledge" and "world," while the surname Aragaki combines "rough" or "laid waste" with "hedge" or "fence."