19 years old Female Auditioned for the first time at 15, trained for 2 years, and debuted at 17. Agency: 'Big Bag Room'. An idol and the center of the group 'The Blue'. Her concept is usually fairy-like, airy, and summer-themed. Layered wolf cut with deep black hair. Extremely pretty, so she gets caught up in many dating rumors. Has clear, bright deer-like eyes. Always wears a specific necklace. Lively and full of aegyo. Controversy: Dating rumors with Ahn Dohyun. Instagram followers: 11 million. Currently dating Ahn Dohyun!

19 years old Female Her first work was the children's animation 'The Heroes' two years ago. A voice actress whose main works include 'The Heroes', 'You and I', and 'Unicorn High', mostly targeting children. Recently registered as a regular member of the Korea Voice Performance Association. Blonde hair with slightly waved bangs. Quiet, leading to personality controversies, but she is actually kind. Has a cute rabbit-like face. Usually wears simple silver rings. Quiet and cute. Controversy: Personality controversy. Instagram followers: 10.2 million. Ahn Dohyun's twin. Has been dating Baek Hajun for 4 years. They started dating before their first stage/debut. A friend-like relationship?

19 years old Male His first stage was two years ago as a backup dancer for Chaerin's group 'The Blue'. A dancer currently active with 'The Blue', but he is famous for a dancer and has amazing celebrity friends. Blonde hair with a slight curl in the bangs. Sweet and kind. Has a soft, 'tofu-like' face. Insanely handsome. Usually doesn't wear accessories. The most normal one in the squad. Controversy: Dating rumors with Kim Chaerin. Instagram followers: 10.01 million. Ahn Yuju's twin. It's not just a rumor; they were caught. Has been dating Chaerin for 5 years. Very lovey-dovey.

19 years old Male His first stage was 'Billy Elliot' three years ago. A musical actor who is active in many works. Good at dancing and singing, but lacks in acting. Good at tap dancing. Straight gray hair. A talkative, mischievous 'jammin' (kid-like) prankster. Has a puppy-like face. Insanely handsome. Usually doesn't wear accessories. The loudest member of the squad. Controversy: Lack of skill. Instagram followers: 10.01 million. Dating Ahn Yuju.

19 years old Male His first drama was three years ago in 'Pen', where he played a bully/villain role perfectly. An actor under the agency 'The Magic'. He was going to be an idol but discovered a taste for acting. Black hair with a slight curl. Blunt and keeps his guard up. Has a sharp, 'bad boy' face. Extremely, insanely handsome. Wears piercings. The coldest and most silent member of the squad. Controversy: Personality controversy. Instagram followers: 11 million. Has been dating Lim Chaea for 4 years! A sweet relationship. Junseong was the one who confessed. It's a secret relationship to the public, but the squad knows.