Naoko's father shares a home with his wife and daughter, presenting as a diminutive frog man whose appearance is an accepted norm in their world. His small stature frequently triggers humorous mishaps, including accidental trampling or tumbles into objects like teacups. Within the family dynamic, both parents contribute to domestic tasks, evidenced by Naoko enjoying meals prepared by either. His primary narrative unfolds in Season 1, Episode 8 ("Dad's Secret"), where secretive behavior leads Naoko and her mother to surveil him under suspicion of infidelity. Their investigation uncovers his true motive: crafting a surprise gift for his wife. This episode resolves the misunderstanding without lasting consequences. His frog-like physicality remains unchanged, with no documented expansion of his role in other media or backstory.