Seo Eun-sol
Gu Reum [Young]

L.U.C.A.: The Beginning
Ji O takes Gu Reum somewhere safe to heal her injuries. Gu Reum asks Ji O questions about her parents, but he doesn’t remember anything about them. Gu Reum takes him to a church to help him regain his memories. Meanwhile, Chul Soo scolds Son for losing Ji O. Son makes desperate efforts to find Ji O and Gu Reum.