Yeo Hwan Woong is a South Korean singer, dancer and member of ONEUS (원어스). He graduated from Seoul Performing Arts High School and is currently enrolled in the Broadcasting Entertainment program at Global Cyber University.
Before debuting, he spent time as a trainee at PLEDIS Entertainment and made it to the final of PLEDIS Hot Debut in 2013. He was considered as a potential candidate for SEVENTEEN but, ultimately, was not chosen, and he left the company.
He joined RBW Entertainment (알비더블유) in 2017 and made his debut in January 2019 as ONEUS's main dancer and sub-vocalist with their first EP, “Light Us".