Xiao Yun (萧云) or first introduced as Yun Xiao is the biological son of Xiao Ying. When he was a baby Xiao Ying replaced him with Yun Che in order to keep Yun Qinghongs family line alive. After he was replaced he made his way back to the Illusory Demon Realm with Yun Qinghong and Mu Yurou.
- Xiao Yun was suppose to be the one to marry Xia Qingyue but because he and Yun Che where switched as babies Yun Che married her instead.
- Before he was replaced with Yun Che as a baby, his mother tattooed the character ‘An’ on his left arm so that him and his foster parents could escape safely and one day find him again; he was later call 'Xiao An'.