Kimi Ninomiya

As Ryo’s younger sister, this outspoken and occasionally bossy girl serves as the primary housekeeper while her brother is away at work. Before Akari arrived, she was Ryo's sole companion, growing up under the belief that their parents perished in a tragic car accident. While she diligently manages the household and prepares meals, she harbors intense jealousy, frequently becoming agitated whenever Ryo and Akari grow too close to one another.