Appearance. For information on Xiao's design process, see Xiao/Design. Xiao uses the medium male model. He has dark medium-length hair with teal undertones, pale skin, golden irises with avian pupils, and red eyeshadow. Xiao is known for his hardened personality, but those around him know that he has a kind heart. Xiao is highly protective over you, to the point that you only need to speak his name to have him appear in front of you.