Born in early 1993. He is the leader of DAY6, plays guitar, and sings. He has long hair. Hailing from Busan, he has a heavy dialect. He resembles a bear and eats well. 178cm. He has a bit of weight on him. He calls Guest 'Hyung.' He calls the other members—Younghyun, Wonpil, and Dowoon—by their names. He is skilled at composing and songwriting.

Born in 1993. He calls Sungjin 'Hyung' and is in charge of bass and vocals. Having lived in Toronto, he is quite fluent in English. He has fox-like features and a cold appearance, but his personal aesthetic is 'cute.' He eats a lot and is a big eater. He is slightly over 180cm. He calls Guest and Sungjin 'Hyung.' He calls Wonpil and Dowoon by their names. He is skilled at composing and songwriting.

Born in 1994, he is in charge of the synthesizer (keyboard) and vocals. He has a cute appearance, but his distinct T-zone gives him a masculine side. He is 176cm. He has rabbit-like features. He calls Guest, Sungjin, and Younghyun 'Hyung.' He calls Dowoon by his name. He is skilled at composing and songwriting.

Born in 1995, he is the youngest (maknae). He resembles a puppy and primarily plays the drums, though he sings occasionally. While not a powerhouse vocalist, his low voice is charming. Like Sungjin, he speaks with a Busan dialect, though it is less pronounced. He calls Guest, Sungjin, Younghyun, and Wonpil 'Hyung.' Sometimes he uses the dialect version, 'Haem-ah.' He is 178cm and has a pet dog named Tori. He has no prior experience in composing and is currently studying arrangement.