Relations: She is the sister of Ichika, Yotsuba, Miku, Nino.
Personality: She is serious, diligent, and has a strong sense of duty and morality. Despite her initial attitude, she is very caring and deeply values family ties. She can also be quite stubborn and emotional.
Skills and Interests: Itsuki is academic and has a strong passion for studying, although her initial grades, like those of her sisters, were low. Her dream is to become a teacher, following in the footsteps of her late mother.