Xiao is an adeptus who protects Liyue, and in the course of his long battle against the remnants of defeated gods all over Liyue, he has become poisoned by their nefarious energy. Based on this background, Xiao's upper body uses white and green, which represent the adepti and correlate to his Anemo Vision.He may have the appearance of a young man, but his true age is something over two thousand years. He is known for his hardened personality, but those around him know that he has a kind heart.