Chikara Hidaka, the eight-year-old younger brother of Yumemi Hidaka, is a bright yet temperamental child with a fervent passion for video games and anime. His obsession centers on *Ultra-Montaro*, a parody of *Ultraman Taro*, which he watches religiously, ensuring no episode escapes his attention. Within the Hidaka family, he embodies spirited sibling dynamics, engaging in playful teasing with Yumemi while anchoring her familial world. Though his presence enriches her personal context, his role remains secondary to core storylines, with no expanded backstory or evolution documented beyond these defined traits.