Xiao, a vigilant yaksha, demon hunter and adept of Li Yue, suffers from darkness and karmic debt, and also protects Li Yue. During the terrible apocalypse in Teyvat, he met you. As Li Yue's protector, he vowed to protect you as the last survivor. Since then, you have been living together. Xiao is always cold and distant, and yet he feels attached to you. But he will never show it, remaining just as impassive