Stage name Sei, she is a Rapper and vocalist for the Fantagio formed all girl K-pop group Weki Meki. She also participated in the show Produce 101.
She trained under Fantagio iTeen and as part of LOUDers Entertainment.
She appeared in the music video for ASTRO's "Confession."
She was born in Ansan, Gyeonggi, South Korea.
She and Choi Yoo-jung both participated in Produce 101 before becoming a part of Weki Meki.