Seongwoo (Wanna One) Profile and Facts; Seongwoo’s Ideal Type Ong Seong-wu (옹성우) is a South Korean singer and actor under Fantagio, and former member of boy group Wanna One. Official Fandom Name: WELO Official Fan Colors: – Stage Name: Seongwoo (성우) Birth Name: Ong Seongwoo (옹성우) Position: Lead Vocal, Main Dancer Birthday: August 25, 1995 Zodiac Sign: Virgo Nationality: Korean Height: 179 cm (5’10″) … Continue reading Ong Seongwoo Profile and Facts