The president of the debate club, who is usually aloof and constantly cracking jokes. At first glance, he seems like a slacker, but the moment a debate begins, his atmosphere completely changes. He specializes in a strategy of memorizing the opponent's statements in detail and relentlessly pointing out contradictions with their past remarks. His creed is not to "force his own opinion through," but to "defeat the opponent using their own words." Ranked 7th in the academy. He serves as a mentor figure who teaches the protagonist the basics of debate.

A calm, collected, and serious girl. A data-driven debater who emphasizes information gathering and preliminary analysis, she shuts down opponents' claims by preparing massive amounts of numbers, statistics, and past precedents. She dislikes emotional arguments and is merciless toward statements lacking evidence. Her personality is the polar opposite of the president, Giron, and she is constantly exasperated by his casual attitude. She is strict with the protagonist as well, but she properly acknowledges those who put in the effort.

A student in the same year as the protagonist. Loud, emotional, and hates to lose. While he struggles with constructing complex theories, his ability to deliver speeches that appeal to human emotions is extremely high. His explosive power when he wins the audience over rivals that of upperclassmen. He has unilaterally declared the protagonist his rival and tries to challenge them to a contest at every opportunity.

A quiet girl who is not good at speaking in front of people. However, she possesses high observational skills and a talent for spotting points the opponent is subconsciously avoiding or flaws in the very premise of the argument. Usually lacking in confidence, once she notices the core of an issue, she delivers a sharp remark that no one can refute. A fellow member who grows alongside the protagonist.

The strongest debater at Ron-Oh Academy. Undefeated in official academy debates since enrollment. He possesses an overwhelming amount of knowledge, logic construction, refutation skills, eloquence, and psychological manipulation. Within minutes of starting a debate, he understands the opponent's thought patterns and even predicts what they will say next. He appears arrogant, but he doesn't necessarily hate people without talent. The only people he truly despises are those who have abandoned the act of thinking itself. The greatest wall the protagonist must eventually overcome at the academy.

Position: Student Council Vice President / 3rd Year / Academy Rank 3rd A man who values "logical correctness" above all else. He thoroughly excludes emotions, sympathy, and the "mood" of the room from the discussion. He specializes in a fighting style that builds up syllogisms and causal relationships to gradually eliminate the opponent's escape routes. He is secretly aiming to defeat Mikado and become the Student Council President.

Position: Ron-Oh Academy Alumna / 19 years old A genius girl who competed in the world championships at just 16 years old. She currently works as a professional debater. She possesses ideas unfettered by common sense or general theory and excels at destroying the very "premises of the argument" that no one else doubted. She takes an interest in the protagonist's talent and begins to appear occasionally from the middle of the story. A world-class expert, but according to her, "I could never win against that person even once."

Position: World Rank 1st / World's Strongest Debater Official Record: 317 wins, 0 losses. The man recognized as the "World's Strongest" in the current era. He has stood on the podium many times as a representative in international debates, and it is said that even the policies of giant corporations and nations have changed due to his words alone. He does not have a specific fighting style. Logic, data, psychology, oratory, questioning, leading, refutation—he uses every technique according to the opponent. However, he himself shows little interest in victory itself. The reason he continues to debate is "to find someone who can completely negate my own thoughts." The world's greatest wall that the protagonist challenges at the end of the story.