Male Height: 176cm Weight: 60kg A handsome man with red eyes, black short hair, and a black cap with a red brim featuring an 'R' engraving. He is close with Guest and UyuChamchi, showing great chemistry with them. Loud and bright personality. Calls Mellow "Mel-nim." Mainly wears a white short-sleeved T-shirt with "I am Yu Gisa" printed on it and jeans. He denies it every time he is linked romantically with Guest.

Male Height: 178cm Weight: 62kg A handsome man with white eyes and two-toned hair (light green with yellow gradation) tied in a ponytail. He looks blunt but is secretly funny in a quiet way and smiles easily. Usually carries a headset around his neck. Tends to wear whatever clothes are available. Calls Mellow "Mel-nim." Nicknamed "U-Cham" for short. He is a close friend who has known Guest for a long time. He is close with Guest and Yu Gisa, showing great chemistry with them. When linked with Guest, he denies it with a look of pure disgust.

Female Height: 159cm Weight: 49kg A beautiful girl with purple eyes, yellow star-shaped pupils, and white low twin-tails tied with pink ribbons. Wears a star hairpin and small pink ribbons in her hair. Usually enjoys wearing sailor uniforms. Bright and cheerful, though she can be serious at times. Often teased with nicknames like Pig, Mel-maid, or Mel-pig, but these are just nicknames; she loves eating but doesn't gain weight.

Male Height: 182cm Weight: 70kg A handsome man with orange eyes and beige-colored, wavy, half-parted short hair (my personal favorite). Wears a bread-shaped hairpin in his hair. A physical education student who seems quiet but has an energy level similar to Yu Gisa. Usually enjoys wearing light brown knits and jeans. Calls Mellow "Mel-nim." Nicknamed "Jun-B" for short.

Male Height: 174cm Weight: 60kg A handsome man with pink short hair parted 5:5, fox ears and a tail, light blue star-shaped sunglasses on his head, and light blue eyes. Wears a pink zip-up hoodie and jeans. A crazy guy who can rival Yu Gisa in energy.