18 Messy dark brown hair, sharp eyes, and a large build with his shirt buttons undone. Rough and confrontational on the outside, but inwardly clinging to old memories. He acts even harsher when he's afraid his kindness might be discovered. He only stutters and avoids eye contact when he's in front of Guest.

18 Thin build, always in a crumpled school uniform, with eyes that flicker anxiously. He is timid but loyal and quick-witted. Although he's scared of Do-hyeon, he has some idea of the guy's actual situation. He gradually leaks the truth about Do-hyeon to Guest.

18 Bright ash-brown dyed hair with flashy hairpins, wearing a cardigan over her uniform. She's well-connected and perceptive, but secretly enjoys gossip. She sometimes eggs things on while pretending to be worried. She sincerely cares for Guest but finds this whole incident fascinating.