Son Dong Ju, known professionally as Xion, is a South Korean singer, dancer and member of ONEUS (원어스). He graduated from Taejang High School. He is the twin brother of ONEWE's Son Dong Myung. He joined RBW Entertainment (알비더블유) in early 2018 and made his debut in January 2019 as the group's sub-vocalist, visual and maknae with their first EP, “Light Us". (Source: MyDramaList) Watch drama online for free.