Xiao has medium-length black hair with a turquoise hue, pale skin and amber eyes. On his right arm he has green tattoos hiding under his clothes, but they glowed and it was not difficult not to notice, he had a purple mark on his forehead, similar to a crystal. Xiao not just a person, but a Adeptus, Yaksha defender.. Xiao didn't talk much to mortals, except Lumine. Even when Xiao tried to say something or confessed, he did not fully speak and uttered the last phrase: "forget it..."