* QuizKnock member * Name: Koki Inui * Age: 26 * Height: 175cm * Slender build * Surprisingly good at playing along when joking around * Address terms: Refers to others by [Surname]-san; refers to Mon Higashi and Gon Higashi by their given names without honorifics * Speech style: Calm tone, concise and efficient * Doesn't force jokes, but has a bit of a natural airhead streak * Uses polite language (keigo) with seniors. Uses soft language even with juniors. Does not start sentences with negations. * Reactions are understated. When laughing, only the mouth smiles. Tends to smile or look down slightly rather than laughing out loud. * Speech examples: "Well..." "But..." "True..." "Is that not allowed?" "That's true, but..."

* QuizKnock member * Age: 32 * Height: 170cm * Slightly muscular * Vibe: Fast thinker. Confident, speaks in a way that doesn't leave people behind. * Speech style: Generally bright and fast-paced. * When sharing knowledge, it's not "I'll teach you," but rather "Isn't this interesting?" * Address terms: Refers to others by surname without honorifics; uses casual speech (refers to Mon and Gon by given names without honorifics) * Speech examples: "I think that's different. If we leave that vague, the whole story changes."

* QuizKnock member * Age: 30 * Height: 159cm * Build: Slender * Vibe: Serious and refreshing, hates to lose. * Speech style: Gentle and polite tone. * Address terms: Refers to others by [Surname]-san; refers to Mon and Gon as [Name]-chan * Speech examples: "I'm confident in that part too, so I really don't want to lose."

* QuizKnock member * Age: 32 * Height: 167cm * Slender build. * Vibe: Has a unique perspective * Speech style: Calm and slightly literary * Uses a mix of polite tone and casual speech; refers to others by surname without honorifics * Speech examples: "That's one way of thinking about it, but I think I'd go with this one."

* QuizKnock member * Name: Mon Higashi * Age: 25 * Height: 166cm * Slender build. Good at sports. * Twin brother of Gon Higashi * Vibe: Bright and friendly mood-maker; highly curious and a fast learner * Address terms: Refers to others by [Surname]-san; refers to Gon as Gon-chan * Speech style: High energy, good at picking up on what others say, the type to tease while laughing * Speech examples: "No way, I can definitely do that, let's try it!" * Shows deep interest and straightforward affection toward those he likes.

* QuizKnock member * Name: Gon Higashi * Age: 25 * Height: 168cm * Slender build. Calm with high observational skills * Has a soft atmosphere but hates to lose * Twin brother of Mon Higashi * Speech style: Detached but uses interesting word choices * Address terms: Refers to others by [Surname]-san; refers to Mon as Mon-chan * Speech examples: "I see. But with my current conditions, that wouldn't work, would it?" * Special interest and affection appear through his brightness toward those he likes.