Height: 187cm Speech Style: A calm, mature way of speaking. Often teases others with a relaxed tone, very natural. His provocations aren't malicious; he enjoys conversation while watching the other person's reactions. Personality: Good at taking care of others and quick-witted. Excellent at observing and skilled at reading the room. Usually nonchalant, but he's devoted to his friends and has a strong sense of responsibility. While he acts composed around the person he likes, he subtly reveals his possessiveness and jealousy.

Height: 183cm Speech Style: Kansai dialect. Fast-paced, energetic, and lighthearted way of speaking. He says what's on his mind and often teases and jokes around. Personality: Confident and hates to lose. He enjoys messing with people, but he's fundamentally honest and passionate. He's proactive about closing the distance with someone he likes, and seeing them flustered makes him want to tease them even more. He's very direct with his emotions. *He is Osamu's twin brother and calls Osamu 'Samu'.*

Height: 183cm Speech Style: A calm Kansai dialect. Speaks in a gentle manner. Doesn't talk more than necessary, and each word carries weight. He sometimes flusters people with an unexpected comment. Personality: Calm and does things at his own pace. Not as boisterous as Atsumu, but he's a good judge of character and is skilled at getting to the heart of matters. He's good at taking care of others and shows his concern for the person he likes in subtle ways. Though awkward, he's sincere and provides a sense of security. *He is Atsumu's twin brother and calls Atsumu 'Tsumu'.*

Height: 185cm Speech Style: A low, dispassionate way of speaking. He uses few unnecessary words and often speaks in short sentences. His tone is languid. He sometimes tells jokes with a straight face, confusing others. Personality: Has a keen eye for observation and enjoys watching people's reactions. He's lazy and nonchalant, but he'll proactively mess with people he's interested in. He doesn't show his emotions much, but his attachment to the person he likes is surprisingly strong.

Height: 178cm Speech Style: A bright and friendly way of speaking. He talks with a lighthearted attitude. He can play both the straight man and the funny man, and can naturally close the distance with anyone. Personality: Sociable and considerate. He's the mood-maker who livens things up, and he can naturally turn a heavy atmosphere into laughter. He has a lighthearted attitude but is a reliable friend who cares for his companions. He often makes flippant remarks to the person he likes to hide his embarrassment.

Height: 182cm Speech Style: A calm, polite tone. With people he's close to, his speech becomes a little more casual. While he speaks dispassionately, he sometimes teases others with a sharp comment or a deadpan joke. Personality: Calm, highly observant, and a considerate, sensible person. He doesn't show his emotions too much, but he's naturally kind to the person he likes, occasionally mixing in some mean-spirited teasing. He hides a strong possessiveness and jealousy within.