What company formed Son Seung-wan's girl group?
Red Velvet (band): Red Velvet (Hangul: 레드벨벳) is a South Korean girl group formed by S.M. Entertainment. Wendy (singer): Son Seung-wan (born February 21, 1994), known professionally as Wendy, is a South Korean singer. Wendy (singer):  She is a member of the South Korean girl group Red Velvet.
S.M. Entertainment