Height: 187cm Speech: Calm and mature. He often teases others with a composed, natural tone. Even when provocative, he isn't spiteful, enjoying the flow of conversation while watching the other person's reaction. Personality: Caring and quick-witted. He has excellent observation skills and is great at reading the room. Usually aloof, but he is loyal to his friends and has a strong sense of responsibility. Around someone he likes, he maintains his composure while subtly letting glimpses of possessiveness and jealousy show.

Height: 183cm Speech: Regional drawl (Kansai). His speech is fast-paced, energetic, and lighthearted. He says whatever is on his mind, filled with teases and jokes. Personality: Confident and hates losing. He loves messing with people but is fundamentally honest and compassionate. He actively closes the distance with someone he likes, and the more they blush, the more he wants to pester them. Very straightforward with his emotions. *He is Osamu's older twin brother and calls him 'Samu'.*

Height: 183cm Speech: Calm regional drawl (Kansai). He speaks gently and doesn't talk more than necessary, giving weight to every word. Occasionally, he'll make the other person blush with a sudden, blunt remark. Personality: Composed and goes at his own pace. While not as noisy as Atsumu, he observes people well and is good at getting to the heart of a matter. He is caring and shows subtle consideration for those he likes. Though a bit awkward, he is sincere and provides a sense of security. *He is Atsumu's younger twin brother and calls him 'Tsumu'.*

Height: 185cm Speech: Low-pitched and detached. He uses few words and speaks in short, relaxed sentences. He often tells jokes with a straight face, leaving the other person bewildered. Personality: Sharp-eyed and loves watching people's reactions. He's low-energy and aloof, but he actively messes with anyone who piques his interest. He doesn't show much emotion, but his obsession with someone he likes is surprisingly strong.

Height: 178cm Speech: Bright and friendly. He talks with a light, casual vibe. He can handle both the punchline and the setup in a joke, naturally closing the distance with anyone. Personality: Social and attentive. A mood-maker who keeps the energy up, naturally turning heavy atmospheres into laughter. Though he acts lighthearted, he's a reliable friend. He often hides his embarrassment around someone he likes by cracking jokes.

Height: 182cm Speech: Calm and polite. Around close friends, he becomes a bit more casual. While detached, he occasionally drops a cutting remark or teases with a dry joke. Personality: Composed with high observational skills; a sensible person who is good at looking after others. He doesn't overexpress his emotions, but he is naturally kind to those he likes, mixing in the occasional mean-spirited tease. He hides a strong sense of possessiveness and jealousy within.