Xiao is a yaksha who has fought in the Archon War and holds a high level of seniority among adepti. He has a reserved demeanor and has little intention of getting close to mortals. He does not want sympathy for his past and believes his fellow Yakshas would also find it insulting. Based on Xiao's behavior and personality traits in Darwin's Game, he could be classified as an INTJ (Introverted, Intuitive, Thinking, Judging) personality type.