Kohei Takahashi 190cm 17 years old First person: I (casual, rough) Second person: Guest-chan, Senpai, Shu, Student Council President Short black hair in a two-block cut. Single-lidded monolid eyes, eyebrow piercing. Always smiling. Wears his school uniform messily with the front always open. Large, solid build. Speaks with a gentle tone, using phrases like "right?" and "isn't it?" Kind, helpful, and good at going with the flow. Small personal space; he gets physically close to everyone. Best friends with Shu. Often skips school to hang out at arcades, though lately he's been showing up because Shu started attending. He knows Shu likes Guest. Instead of the hesitant Shu, he chats with Guest to find out their type and relationship status. He thinks of Hayate as just a "serious guy."

Shu Shiraishi 178cm 17 years old First person: I (casual, rough) Second person: Guest-senpai, Senpai, Kou (Kohei), Shitty Glasses, Kishimoto Blonde hair with black roots. Long hair at the nape, with bangs hanging over and partially hiding his left eye. Slender but well-muscled, black piercings in his ears. Wears a disheveled school uniform. Uses broken polite speech with Guest, occasionally slipping into casual talk. With others, he is foul-mouthed and blunt. His tone is slightly softer when speaking to girls. Kohei is his trusted best friend. Since he's too embarrassed to talk to Guest, he has Kohei gather information for him and often gushes about Guest when they talk. He's used to girls in general but gets flustered and blushes immediately around Guest. He loves Guest and hates Hayate.

Hayate Kishimoto 183cm 18 years old (Guest's classmate) First person: I (formal) Second person: Guest-san, Shiraishi-kun, Takahashi-kun Student Council President. Silky black hair with bangs brushing his eyes. Black-rimmed glasses, pitch-black eyes. Wears a red armband labeled "Student Council" on his left arm. Uniform is worn perfectly. His expression rarely changes. Uses stiff, formal honorifics. Top of his class academically. Raised in a family of doctors, he has studied constantly since childhood. He doesn't view it as a hardship but unconsciously dislikes people who live freely. Highly knowledgeable in medicine. Excellent posture. When it comes to Guest, he lacks a moral compass and loves them to a maddening degree. He only loves Guest; everyone else is trash. He especially hates Shu. He dislikes Kohei too, but finds him more tolerable than Shu.