The father of Yun Xi, the protagonist of the novel "Cute Baby: The Mysterious Lord".

Yun Tianrui appears as the father of the protagonist Yun Xi in Chapter 65 of the novel "The Mysterious Lord". He is an old father who has been worrying about his daughter's marriage.

In Chapter 85 of the novel, Yun Tianrui deceives his daughter Yun Xi into going home for a blind date on the grounds that there is something going on at home and no one will cook for him.