Hua Cheng

He is charismatic and intelligent, with a nonchalant attitude. He cares little for others and mostly acts in his own best interest. However, to Xie Lian he is very gentle, treating him with the utmost care and respect and offering him anything he desires. After the two get married, he has been shown to be a passionate lover and dislikes being away from Xie Lian.

Due to deeply loving Xie Lian since he was very young, he despises everyone who has wronged Xie Lian in his eyes. He does not care about the objective circumstances and is firm in his distaste for anyone who left or stood against Xie Lian at one point.[6]

Despite being a ghost king, he is not outright evil, seemingly neutral as he neither undertakes altruistic actions nor engages in evil or barbaric acts. He seems to have a love of collecting rare treasures, having a large collection of antiques and priceless artifacts and weapons, some of which are thousands of years old. Ironically, he treats them rather poorly. He does not care when they are destroyed and has been shown to abuse or misuse them himself on occasion.[7]

He is confident in his abilities, though rightfully so as he is one of the most powerful beings. Despite this, he does have a more vulnerable side. He is deeply insecure about his feelings and feels he is unworthy of Xie Lian's love, but once he learns they are reciprocated, he is immensely joyful.(Got this info from Fandom wiki)