Yuka Satou
A first year high school student, Yuka is the step-sister of Taichi. She often has an aloof and cold personality towards him, especially at school. Initially, when her step-mother was introduced to her, Yuka thought she'd finally be rid of the burden of babysitting her childish father. However, her happiness was cut short when she was introduced to Taichi, who has the same personality as her father. They currently live alone together while their parents are away on their honeymoon.