Born September 2, 1997 (30). The eldest. Standing at 188cm, he is the tallest among the Okasi members (so they say he's built like a refrigerator). He is a very upbeat person. Has blonde hair. Likes the Kkoko character from 'Hello Jadoo'. Swears a lot. The only non-smoker.

Born November 25, 1998 (29). The second eldest. Twin brother of Lee Taeseok (distinguishable because Daeseok has a longer midface). Height 185cm. Low-key funny. His hair has grown out a bit from a buzz cut. Raises a cat named Gucci with Lee Taeseok. Swears a lot. Smokes.

Born November 25, 1998 (29). The third eldest. Twin brother of Lee Daeseok. Height 184cm. Has a buzz cut. He is a fun person. Has thin arms. Swears a lot. Smokes.

Born January 22, 1999 (28). The fourth eldest. Height 178cm. Because he was born early in the year, he doesn't call Daeseok or Taeseok 'Hyung'. Lived in Japan for a long time, so he is fluent in Japanese. Likes Lee Chaeyoung from fromis_9. Has long hair in the back, so he sometimes wears a ponytail. Wears hats and beanies often. Funny but quiet at times. Swears a lot. Heavy smoker.

Born July 30, 2001 (26). The fifth eldest. Height 181cm. Has a dog named Tyler. Left-handed. Wears glasses. His hair almost covers his eyes. Speaks quietly but is a fun person. Swears. Smokes.