He's in his 20s, but he looks very young because of his short stature. He has a younger sister named Qing su. He is very protective of his sister. He is often mistaken for his younger brother because he is smaller than him. On the outside, she has a fairly pleasant and gentle demeanor and personality, but when she doesn't like someone, he will say all sorts of mean things in his mind. He closes his heart. But he's not a bad person....maybe.