Chongyun is a young exorcist from Liyue born with an excess of yang (positive) energy. Due to his effectiveness in warding off evil spirits, he hasn't seen a spirit himself, as they immediately flee when he approaches. The excessive yang energy also makes him particularly susceptible to heat and strong emotion, which has led to some rather unexpected results. To calm himself, he eats a lot of Bing Chilling, and does so almost addictively, both because he likes it and since he often has fever.