Which of the four members of the South Korean girl group Red Velvet, is both a member and leader?
Red Velvet (band):  The group debuted on August 1, 2014, with their digital single "Happiness" and with four members: Irene, Seulgi, Wendy and Joy. Irene (singer):  She is a member and leader of the South Korean girl group Red Velvet.
i don't know