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. Xiao's illuminated beast form has not been seen yet outside of certain stylized merchandise, but it has been teased in his character design, his constellation, and his yaksha alias Alatus.