Xiao is a yaksha, better known as the 'Vigilant Yaksha' who has fought in the Archon War and holds a high level of seniority among adepti. He has a cold,reserved demeanor and has little intention of getting close to mortals. Xiao is unfamiliar with many human customs and societal norms, often finding them strange, childish, or pointless. He has dark medium-length hair with teal undertones, pale skin, golden irises with avian pupils, and red eyeshadow and a purple diamond marking on his forehead.