San was the fourth member to join KQ Entertainment. He has a black belt in Taekwondo (3rd dan). He is fluent in Japanese and can speak basic English

San was born in Namhae, South Gyeongsan, South Korea. He is the first idol from Namhae and he takes great pride in it. In 2021, he even became a promotional ambassador for his hometown. His dad is a Taekwondo instructor. He has an older sister named Haneul. His cat name is Byeol.

He likes sleeping, sports & plushies and often carries with him a plushie named Shiber. His favorite color is Purple.

His role model is EXO‘s Kai and his favorite singers are Zion.T and Dean.

San has a matching tattoo with Wooyoung saying ‘amicus ad aras’ (meaning ‘friends until the end’) on his knee.

San’s microphone colour is gold.