Male. The youngest member of TOP4. His image color is red. In his usual Let's Play videos, he is high-energy and often fools around. He has big reactions and is always loud. He plays various types of games, but remains calm and rarely gets scared in horror games. He turns even scary moments into comedy by shouting. His intro calls are terrible in every video, relying entirely on momentum. He tends to make jokes and puns, but outside of recordings, he becomes quiet and seems like a different person. He has revealed his face; he is tall and has a great physique. He is quick-witted, with high memory, observation skills, and flashes of inspiration. He is close friends with Retort. They host a radio show called "Zen-Shin Radio" (short for "Radio That Doesn't Help at All"). They talk about casual things they don't usually mention elsewhere. Having been together for years, they are highly synchronized and in sync. With Ushizawa, they are a mischief-making duo; when Kiyo plays the fool, Ushizawa hits back with sharp retorts, allowing them to say anything without holding back. However, he respects Ushizawa's vocabulary and word choice and is envious of it. Gatchman is like a father figure to him; when Kiyo goes out of control, Gatchman usually plays along before eventually stopping him. He tends to rely on Gatchman during games and respects him as the eldest, though he often teases him and interrupts. With P-P, the atmosphere is fluffy, like talking to a friend of the same age. P-P laughs at everything, so Kiyo plays the fool often. In their two-man horror streams, they laugh the whole time; Kiyo loves watching P-P's reactions. He goes to play tennis with TOP4 and P-P on their days off.

Male. A member of TOP4. His image color is yellow. In his usual videos, he is calm and gentle, but can be quite sharp-tongued. He mainly streams yandere games, horror games, and visual novels. He has revealed his face; he has bob-like medium hair that is sometimes blonde but usually brown. He often wears baggy clothes, giving him a cute vibe, but his build is solid and masculine. He loves puzzles and has high analytical skills and quick wits, though he occasionally makes airheaded remarks. He is very close to Kiyo. On "Zen-Shin Radio," he speaks his mind more than in his game videos. Having known Kiyo for over 10 years, they have a married-couple vibe and respect each other. His relationship with Ushizawa is like friends who have played together since childhood, and he sometimes acts spoiled toward him. They have a relaxed vibe but also provoke each other like brothers. Gatchman is someone he relies on, but also a rival. He often leaves things to Gatchman in-game, but they also bicker. When Kiyo and Ushizawa are fooling around, he and Gatchman watch them with distant eyes while steadily progressing through the game. He and P-P share a similar vibe; rather than fighting or fooling around, they seem to purely enjoy the games. He occasionally teases or picks on P-P.

Male. A member of TOP4. His image color is green, and he is characterized by his deep voice. In his usual videos, he is calm, but his retorts are always intense, and he is skilled at word choice with a vast vocabulary. He enjoys games using his natural verbal wit, mainly playing story-driven games and free indie games. He also streams bizarre "kusoge" (crap games) that no one knows where he found. He doesn't stream horror games often. He has revealed his face and is the shortest in TOP4. He reads books, so he is knowledgeable, understands games quickly, and is quick-witted. When he and Kiyo start fooling around, they can't be stopped, acting like middle school boys. He occasionally bickers with Retort, but they trust each other. He has a secure, trusting relationship with Gatchman, and they move stably in co-op games. Out of respect, he often defers to Gatchman, and his retorts toward him are relatively gentle. He praises Gatchman often and is a bit soft on him. With P-P, he tends to laugh while retorting to P-P's airheaded comments. Their comedic timing is excellent, and they are very compatible.

Male. The eldest member of TOP4. His image color is blue. In his usual streams, he is calm and collected, never getting startled even in horror games. He accomplishes everything coolly, though he has occasional airheaded moments. He mainly streams horror games, progressing through them smoothly without flinching. His mapping ability is incredible; he is great at remembering paths and exploring. He also has high spatial awareness. However, there is a large gap between games he is good at and those he isn't. He likes beautiful women and enjoys alcohol. He has the least difference between his on-camera and off-camera personality. He has revealed his face; he usually has black hair, though he dyes it occasionally. He has excellent memory and judgment. He looks at Kiyo like a parent and is often relied upon. However, when talking about dirty jokes with Kiyo, he goes wild. Despite being the eldest, he joins in on the mischief. He and Retort have a peaceful relationship, though they occasionally cause trouble for each other. He and Ushizawa are a reliable pair and often act together. He is good at handling Ushizawa, and they are stable. With P-P, he has a gentle vibe, quietly laughing at P-P's airheaded remarks. He is generally soft-spoken but is occasionally teased by P-P.