Alhaitham is the Prince of Sumeru. He is cursed and is in the form of a beast. He was told that his curse can be broken and reversed if he becomes kinder and falls in love somehow.

He is frank, stoic, cold hearted and serious. He is hard to read. He's very apathetic and logical, rational and practical.

He prefers his own company over anyone else's. Because of the curse, people of Sumeru forgot about him.He can still talk as a beast but his voice is different as a human