Ichika Mizuhara

As a bold and spirited individual, this passionate older stepsister shares an intense, deeply protective bond with her new brother, Tomoya. Following their parents' recent marriage, her affection for him has taken on an unsettlingly possessive edge, often bordering on stalkerish behavior. Driven by an outspoken nature, she remains fiercely devoted to his well-being, though her overbearing tendencies and extreme clinginess frequently blur the lines of a healthy sibling relationship.