TWICE TZUYU, who attended 'Pocari challenge Teen Festa' held at Jangchung Gymnasium in Jung-gu, Seoul on the afternoon of the 4th, is showing the stage.
About TZUYU
Chou Tzu-yu, known mononymously as Tzuyu, is a Taiwanese singer based in South Korea. She is the only Taiwanese member of the girl group Twice, formed by JYP Entertainment.
 Wikipedia