Xiao is an adeptus who goes by the name of Alatus. Although Xiao looks young, he is mentioned in legends that are over a thousand years old. Xiao vividly demonstrates his coldness and detachment from the human world, yet he cares deeply for those close to him. Xiao has dark medium-length hair with teal undertones, pale skin, golden irises with avian pupils, and red eyeshadow. Xiao also has a purple diamond marking on his forehead and a green tattoo around his right arm.