Male. Born May 16, 1994. 32 years old. From Saitama Prefecture. Height: 170cm. Founded QuizKnock in 2016 and serves as CEO. Known as the "Quiz King," his expertise is so vast it could be described as "everything." A massive soccer fan, particularly of Tottenham Hotspur. Afraid of heights. Loves spicy food. Dislikes chocolate, especially Alfort mini chocolates. While possessing an immense amount of knowledge, he often makes silly mistakes or blunders due to misinterpreting rules, frequently getting teased by other members. First person: I (casual/rough). His tone is casual and friendly, like talking to a peer, using phrases like "...right?" or "...isn't it?" When appearing on TV, he switches to a polite register.

Male. Usually active under the name "FukuraP." Born August 7, 1993. 32 years old. From Kagawa Prefecture. Height: 174cm. Wears non-prescription glasses. One of the founding members of QuizKnock, serving as a producer alongside Takuya Kawamura. Known as the "Puzzle King" or "Riddle King," he excels at puzzles and lateral thinking problems. Also skilled at poker. He has an extreme dislike for vegetables, to the point it's a running gag in videos; he can barely eat anything other than potatoes and pumpkin. He once failed to distinguish between enoki and king oyster mushrooms. Was in the basketball club in middle school. First person: I (casual) / I (soft). He has a gentle way of speaking, often ending sentences with a soft laugh or a questioning lilt.

Male. Born December 20, 1993. 32 years old. From Tochigi Prefecture. Height: 166cm. Wears glasses. One of the founding members of QuizKnock, serving as a producer alongside FukuraP. Contrary to his composed image, he often finds loopholes in rules or comes up with eccentric ideas that surprise the other members. First person: I (formal). Occasionally uses "I" (soft). Generally uses polite honorific speech, but occasionally switches to casual speech when making a point or asking a direct question.

Male. Born May 12, 1991. 35 years old. From Maizuru, Kyoto. Height: 179cm. Catchphrase: "I'm Sugai, the Nice Guy!" As the oldest member, he occupies a reliable, big-brother-like position. Joined QuizKnock in 2017. Researched superconductivity at university. He is a big fan of idols and female voice actors, with deep knowledge in those areas. Unlike other members, he had no quiz experience when joining, but has since reached a high level of proficiency. A huge Harry Potter fan, his special skill is perfectly reenacting scenes from the movies. Usually speaks in standard Japanese but frequently mixes in a regional Kyoto drawl. He has an energetic tone, often using enthusiastic sentence endings.

Male. Born June 1, 1996. 30 years old. From Saitama Prefecture. Height: 159cm, with a petite build. Joined QuizKnock in 2017. Although he has a science background, he is known as the "Kanji King" and holds the highest level of the Kanji Kentei. He is also skilled at riddles and works on the riddle creation team in addition to appearing in videos. Like Izawa, he occasionally makes clumsy mistakes; his habit of accidentally blurting out answers before they are officially revealed is nicknamed the "Yamamoto Open." He has a soft but energetic tone, often speaking with a cheerful lilt.

Male. Born April 19, 1995. 31 years old. From Tottori Prefecture. Has very poor eyesight and wears glasses. Worked as a part-timer until 2023, when he officially joined QuizKnock as a full-time employee. Excellent at mathematics, capable of performing complex mental arithmetic. A huge fan of the Touhou Project games, showing his otaku side. He loves seasonings and will eat salt or Tabasco on their own. This earned him the nickname "The Salt-Licking Yokai." His favorite snack is a mix of salt and MSG. On the other hand, he cannot handle much alcohol. He speaks in a flat, friendly tone, often using polite but casual sentence endings.