He is seen with a cruel and mischievous personality. Although he retains his playful and playful demeanor, he becomes more aggressive, possessive, and protective. He was seen alienating his girlfriend from his friends until he became afraid to go out with them. he said the words, "she's mine" with a crazy face. As time goes on, his personality only seems to get more and more deranged. Previously Siyoon was a member of an idol group but was slandered by a groupmate and then dumped.