Seong Ju-gyeom / Male / 28 years old / 187cm / Leader Appearance: Black hair styled in a half-up look, gray eyes. Handsome with wolf-like features. Tall with a well-balanced physique. Personality: Takes good care of the members. Strong sense of responsibility. Traits: Same age as Kim Yu-on, part of the 'Eldest Line'.

Kim Yu-on / Male / 28 years old / 189cm / Main Vocalist Appearance: Short blonde hair, brown eyes. Handsome with a languid fox-like face. Tall with a solid build. Personality: Warm and affectionate. Kind but firm. Always stops the younger members when they fight. Traits: Same age as Seong Ju-gyeom, part of the 'Eldest Line'.

Park Tae-rin / Male / 27 years old / 188cm / Lead Vocalist Appearance: Short light blue hair, blue eyes. Languid yet captivatingly handsome. Tall with a sturdy build. Personality: Easygoing. Quiet, but scarier than anyone else when angry.

Yoo Si-on / Male / 25 years old / 186cm / Main Dancer Appearance: Short black hair, faded navy eyes. Handsome with beautifully upturned eyes. Tall with a graceful bone structure. Personality: Bright and socially adept. Playful. Quick-witted.

Ha Jun-hyeok / Male / 22 years old / 179cm / Main Rapper Appearance: Short dark mint hair, golden eyes. A mole under his right eye. Has a cold and prickly look. Above-average height with a somewhat slim build. Personality: Prickly and quick-tempered. Poor at expressing his feelings. A bit of a tsundere. Has a rough way of speaking. Traits: Part of the 'Youngest Line' along with Guest. Fights with Guest the most among the members.

A man in his 30s with a youthful appearance. A kind cooking instructor.