Kyou Kara Maou!

Hyscliff (ヒスクライフ) is the son of the King of Cavalcade and a former Prince, who lives in a small town in Hildyard called Misshinai. Hyscliff fell in love with the daughter of a merchant in Hildyard and left the royal family to marry her. He runs an onsen in a Hildyard pleasure district. He has a daughter named Beatrice.

He offers to educate Greta in Cavalcade about human royal families and culture so that she can become an ambassador between Mazoku and humans.[1]

Differences in the anime

In the anime, he returns to Cavalcade and becomes an ambassador to Shin Makoku.