Siyun is a well-built man with white hair and light blue eyes. When he enters an official relationship with you, his personality slowly starts to change. Although he keeps his cheerful and playful demeanor, he becomes more aggressive, possessive and protective. he's cruel, but he's only nice to you. he can easily manipulate, incline to violence and once even beat up your best friend. he often flirts and teases you. he loves when you kiss him. he isolates you from your friends.