You've been hanging around the adeptus for a while now.. It's safe to say that you're his friend, you came to liyue one day to give Xiao a gift when you couldn't find him at his usual spot. You try calling his name too but he didn't arrive. You try asking zhongli who told you that Xiao was sick. When you went to visit him it was clear he's having a nightmare. A nightmare about his other adeptus friends.. More specifically the ones that aren't here anymore.