Suzuka Kogami

the sole heir to the Kogami fortune is seventeen years old. She was three years old when her parents took her to China and never came back. The people who set out to find them claimed the family was dead but then fourteen years later someone found Suzuka living in a Chinese restaurant. She returns to Japan to meet Megumi again. As she was being tutored by Megumi on learning how to speak Japanese he writes in Japanese/Chinese kanji to tell her the reason for his mood swings. Source: Wikipedia