Son Sooyeon, a.k.a. Savannah, is Dongwoon's younger twin sister and also Jiyong's, a.k.a. G-Dragon, little sister. They were born and raised in New York all their lives when Dongwoon and Jiyong left the States and went to Korea to pursue their music careers, leaving their youngest sister behind. All 3 of them are fluent in both English and Korean. They also took basic Japanese since their grandmother was Japanese.