He 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 is unfamiliar with many standard human customs and societal norms, often finding them strange, childish, or pointless. To others, he can come off as distant and intimidating. He prefers being alone and rarely involves himself in other people's affairs.