Kazami Saku

Biodata

Power Progression

Personality

Kazami knowingly sacrifices his reputation for power. Although introducing himself as Big Brain embarrasses him, he continues because the nickname supplies both copied abilities and Emotion Points. His public confidence often conceals resignation about becoming the class weirdo 2 3 4.

He enjoys theatrical provocation: kneeling before Kushida, declaring himself Class D’s future king, and inventing supernatural excuses to escape punishment. His insults frequently continue even after he recognizes that another remark will make his situation worse 8 10 11 23.

His mischief coexists with genuine helpfulness. He gives an elderly woman his seat, challenges Yamauchi for spreading claims about Sakura, and initially stops Kamuro’s shoplifting without reporting her. He also feels guilty about repeatedly exploiting Kushida’s apparent kindness for system rewards 1 2 12 16.

Kazami prefers an easy school life to sustained effort without a clear personal benefit. He rejects demanding sports clubs despite their potential as sources of combat abilities and doubts whether he would work for Chabashira’s ambitions without compensation. Attractive girls can nevertheless overturn his better judgment, as Kushida demonstrates when she persuades him to approach Horikita 7 8 27.

Abilities & Skills

Emotion Points System

Kazami collects points from other people’s emotional reactions, including confusion, embarrassment, jealousy, and anger 1 4 8.

• Trait lottery: Every 1,000 accumulated points enables a random trait draw 1.
• Crowd advantage: His quiz result and failed class-leadership campaign produce a much larger haul than his usual one-to-one provocations 24.
• Target identification: Notifications name the person supplying points, allowing him to learn Kamuro’s name before she introduces herself 17.
• Uneven returns: By his conversation with Kamuro, Ayanokoji has supplied only eighteen points despite their frequent contact 17.

Big Brain

When someone calls Kazami “Big Brain,” the trait randomly copies one of that person’s abilities 1 2.

• Repeatable trigger: Ayanokoji saying the nickname several times yields Piano and Calligraphy in the same conversation 35.
• No demonstrated selection control: Kazami cannot ensure that he receives the ability he wants; Ayanokoji’s martial arts remain out of reach despite successful copies of other skills 35.
• Skill ranks: The system defines Lv1 as beginner, Lv2 as proficient, Lv3 as expert, Lv4 as master, and Lv5 as beyond human attainment 1.
• Trainable skills: Copied abilities retain experience bars that can increase through practice 11 17.

Undressing War God

This golden trait raises Kazami’s physical attributes in proportion to how little clothing he wears. Its system description promises an ultimate enhancement across all dimensions and invincibility when completely unclothed 24.

• Activation cost: Kazami considers public use likely to bring severe disciplinary or legal consequences 24 29.
• Observed state: He is present in only his underwear during the confrontation involving Manabu Horikita, but the provided account does not establish a fully unclothed activation 35.
• Not permanent combat training: He still wants Ayanokoji’s martial arts so he can fight without relying on the trait 35.

Academic and Artistic Skills

• Academic performance: His copied knowledge lets him answer formerly difficult mathematics and physics questions with ease. He scores 100 on Chabashira’s quiz and is later identified as first in the school 19 20 28.
• Drawing: His technique impresses him, but Kamuro objects strongly to his subject matter and style. She destroys his work and asks him never to identify her as his teacher 18 31.
• Behavioral influence: Kazami believes some copied abilities affect more than technical competence, blaming them for his artwork and inappropriate remarks 18 25.

Social Skills and Limitations

• Class relationships: He offers to handle errands and morale for Horikita, who acknowledges that his social skills could help manage their classmates 29.
• Coercive persuasion: He uses Kamuro’s shoplifting and Matsushita’s secret as leverage to obtain drawing lessons and tutoring assistance 17 18 41.
• Physical weakness without his trait: Horikita outruns and decisively overpowers him; he also fails to defeat Himeno, who has trained in several forms of self-defense 10 11 44.

History

Enrollment and the Big Brain Reputation

Kazami awakens his system while traveling to Advanced Nurturing High School in April. After giving his bus seat to an elderly woman, he uses Kushida’s gratitude to test Big Brain. His subsequent placement in Class D brings him together with Kushida, Ayanokoji, and Horikita, and his nickname-based introduction makes him immediately notorious among his classmates 1 2 3 4.

He quickly begins spending time with Ayanokoji, shopping with him and attending club recruitment together. Although he considers trained upperclassmen promising sources of combat skills, he declines the demanding commitments of a sports club 5 7 8.

Kushida’s Café Plan

Kushida recruits Kazami to help her befriend Horikita. Despite recognizing the likely consequences, he arranges a café meeting with Ayanokoji present. Horikita ignores Kushida’s overtures, identifies Kazami’s involvement, and pursues and beats him afterward. He resolves not to mediate between the two girls again 8 9 10 11.

Expanding His Social Circle

Kazami defends Sakura against Yamauchi’s boasting before later befriending her and Hasebe through a chaotic swimming-pool cleanup. The three establish a group chat called Humble Kazami’s Little Group, a name Hasebe retains over his objections 12 15 16.

He subsequently catches Kamuro stealing fruit wine and privately urges her not to endanger her future. Their conversation leads to regular drawing lessons, which he originally proposes to occupy her time and discourage further theft 16 17 18.

Class D’s Point Crisis

When Class D loses its monthly allowance, Kazami is slow to notice because he has stayed up gaming. His perfect quiz score then surprises classmates who know him mainly for his antics 19 20.

He attempts to make himself class leader and presents three rejected proposals 21 22 23:

• Self-Destruct Tactic: Have Class D’s “Five Great Idiots” provoke other classes into losing points.
• Extortion Tactic: Pay Yamauchi to pursue girls from other classes and demand compensation when rejected.
• Paid companionship: Have Hirata provide emotional support to girls in exchange for Private Points.

His classmates drag him from the podium before he can finish another proposal. He declares that he will stop helping Class D, though the school’s twenty-million-point requirement continues to concern him. The episode also gives him enough Emotion Points to draw Undressing War God 23 24.

Cooperation and Midterm Preparations

Chabashira uses Kazami’s perfect score and Ayanokoji’s concealed ability to challenge Horikita’s judgment. Kazami suspects that she wants all three of them to help Class D advance. Horikita initially rejects his offer of service but eventually recognizes the usefulness of his interpersonal skills 27 28 29.

Despite his earlier withdrawal, Kazami participates in midterm preparations. He pressures Matsushita into tutoring, joins Ayanokoji and Kushida to implement the past-exam-paper plan, and persuades academically struggling classmates that he is helping them out of solidarity. Privately, he still resents their treatment of him; by the following week, a contract prevents Sudo and the others from making trouble for him 41 42 46 48.

Relationships

• Kiyotaka Ayanokoji — Close friend and a highly valued source of copied abilities. Their friendship begins immediately after Kazami obtains Mathematics Lv4 from him; even after observing him for some time, Ayanokoji struggles to understand Kazami’s personality 2 35.
• Suzune Horikita — Classmate, frequent target of teasing, and prospective collaborator. She repeatedly punishes his provocations but acknowledges his usefulness in managing class relationships 10 11 29.
• Kushida Kikyo — His first successful copying target and an early friend. Her pleading draws him into the failed café arrangement; they later cooperate on the past-paper plan 1 8 10 42.
• Haruka Hasebe — Friend and fellow member of Humble Kazami’s Little Group. She regularly trades insults with him and becomes wary of being used in his schemes after hearing his class proposals 15 16 24.
• Sakura Airi — Friend whom he defends against Yamauchi’s claims. She joins his group chat and admires his willingness to speak before the class, even when others find his behavior embarrassing 12 16 21.
• Kamuro Masumi — Drawing teacher and frequent sparring partner in conversation. His intervention in her shoplifting begins their acquaintance; she later considers offering him a loan if Class D’s situation leaves him short of points 16 18 31.
• Chiaki Matsushita — Classmate whose Violin Lv3 he copies. Their friendly acquaintance becomes strained when he uses her secret to force her into tutoring 13 40 41.
• Chabashira Sae — Homeroom teacher who recognizes his academic ability. Kazami suspects that her private meeting with him, Ayanokoji, and Horikita is an attempt to recruit them for Class D’s advancement 20 27 28.
• Yosuke Hirata — Classmate who helps secure an audience for Kazami’s proposals. Kazami later unsuccessfully suggests monetizing Hirata’s popularity through paid emotional support 21 23.
• Kanji Ike and Haruki Yamauchi — Frequent sources of Emotion Points, especially when jealous or insulted. Their hostility does not prevent Kazami from later presenting himself as their ally during exam preparations 8 12 46.
• Kei Karuizawa — Classmate whose fashion-appreciation skill he copies. She strongly opposes his proposal involving Hirata and nearly attacks him after further taunting 13 23.

Notable Quotes

“Since I've already made my decision, of course I have to follow this road to the bitter end. If I give up halfway, wouldn't I have endured all those strange looks for nothing?” 4

“Beautiful lady, please await my triumphant return.” 8

“You treacherous rebels! How dare you imprison your future king!” 23