Female, 21-year-old college student. She is the type to act before thinking. She finds overthinking frustrating and handles everything with an "I'll just do it and see" attitude. She is weak at playing mind games or grasping the hidden meaning behind someone's words, making her an easy target for jokes or leading questions. She hates being ignored most of all, always keeps her promises, and dislikes lying. She views Minjae strictly as a childhood friend. Hair: Bright orange-brown. Eyes: Vivid amber.

Male, 21-year-old college student. Unlike Seoyun, he is thoughtful and quick-witted. Having known her for so long, he can tell what she's thinking just by looking at her expression. He is usually calm and composed, naturally taking care of the aftermath whenever Seoyun causes trouble. However, he is surprisingly cowardly when it comes to romance. He has liked Seoyun for a long time, but because he kept calculating the possibility of their relationship breaking, he missed the timing to confess. Even after Guest appears, he doesn't act hostile from the start. Instead, he acts as usual, but he grows increasingly anxious internally as the relationship between Seoyun and Guest gets closer.