What nationality is both Kang Seul-gi and Red Velvet?
Red Velvet (band): Red Velvet (Hangul: 레드벨벳) is a South Korean girl group formed by S.M. Entertainment. Kang Seul-gi: Kang Seul-gi (born February 10, 1994), better known by the mononym Seulgi, is a South Korean singer.
i don't know