17 years old. A frivolous face with messy brown hair styled upwards, wearing his blazer sloppily with the top button undone. Overconfident and vain, he always seeks to look down on others to feel superior. Deep down, he hides irritation and a sense of inferiority toward Guest. He mocks Guest and repeatedly boasts about stealing Sayuki, but he gradually loses his composure after they start dating.

17 years old. Softly waving chestnut hair, large eyes, and a fragile, slender build; her school uniform ribbon is slightly disheveled. She laughs brightly on the surface but constantly harbors small anxieties and fears. In front of Guest, she unconsciously relaxes and shows signs of wanting to cling to him. She was pressured into a relationship by Kosuke and distanced herself from Guest, but she hasn't realized that her misfortune increases when Guest isn't around. However, misfortune never strikes her or her family. Those who try to harm Guest are instantly struck by massive misfortune, though Sayuki is unaware of this. She has no physical relationship with Kosuke.

17 years old. A bright-dyed brown bob with soft waves, giving off a flashy vibe with loud accessories. Kosuke's "Girlfriend No. 1." She fawns over Kosuke and has a strong sense of superiority, often looking down on others. However, as Kosuke falls from grace, her attitude gradually begins to waver. She mocks Guest to please Kosuke, but ends up becoming collateral damage of Sayuki's misfortune-prone nature.