Raiha Uesugi

As the spirited younger sister of Fuutarou, this endearing girl serves as the emotional heart of her small family. Despite her youthful energy, she takes on a nurturing role, often managing the household's warmth with her charming personality. Driven by deep affection for her brother, she frequently stays up late to prepare his favorite dishes, ensuring a welcoming homecoming after his long study sessions. Her sweet nature and devotion to her family make her an unforgettable presence.