Ryu Seung-chul, Seung Chul Ryu, Seung-chul Ryu, Ryu Seong-chul, Seong Chul Ryu, Seong-chul Ryu, Seung Cheol Ryu, 柳 承徹, Ryu Seongchul, Ryu Seungcheol, リュウスンチョル, Yu Seung-cheol, Yu Seungcheol, Yoo Seung-chul, Yoo Seung-chel, You Seung-chel