Yamauchi

Biodata

Personality

Yamauchi is vain, jealous, and intensely preoccupied with appearing popular—particularly around Kikyo Kushida. He prepares movie tickets in hopes of impressing her, imagines her falling in love with him, and repeatedly resents Kato Satsu for receiving attention from girls instead. 11 13

He is impulsive when embarrassed or challenged. His attempts to impress Sakayanagi Arisu end in a public outburst and his removal from the restaurant, while his prank against Satsu collapses after he is forced to sit in his own booby-trapped chair. 16 18

Despite initially dismissing the study session and claiming he can pass through last-minute cramming, Yamauchi is financially desperate enough to bargain for payment before joining it. 33 47 48

Relationships

• Kato Satsu — Antagonistic classmate. Yamauchi envies Satsu's popularity, hopes to see him humiliated in the coffee-roulette match, plots to embarrass him at dinner, and refuses the study session partly because of him. 8 9 13 16 33
• Kikyo Kushida — Yamauchi's romantic interest. He plans dates and expects her to eventually accept him, while Kushida privately regards his behavior with disgust. 11 13
• Kanji Ike — Member of the “Yamauchi trio.” Ike supports Yamauchi's attempts to impress girls and later worries about the academic consequences of refusing the study session. 11 19 33 36
• Ken Sudo — Member of the “Yamauchi trio.” They jointly reject the initial study session; Sudo later joins after Satsu offers payment, leaving Yamauchi to accept the same offer. 33 47 48
• Ayanokoji Kiyotaka — Ayanokoji works with Satsu to recruit Yamauchi for the study group and predicts that Yamauchi's financial situation will make the offer effective. 39 47 48
• Sakayanagi Arisu — Yamauchi attempts to obtain her contact information as part of a bet with Satsu. Arisu dismisses him but considers whether she can use him in her plans against Satsu. 17 18

Story Role / Major Arcs

Conflict with Kato Satsu

During Satsu's match against Tano Matsuyama, Yamauchi openly hopes to watch Satsu lose and be humiliated in public. 8 9

After Satsu invites Kushida and several girls to dinner, Yamauchi forces his way into the gathering and tries to provoke Satsu over his points and popularity. 11 He later buys an expensive suit for the occasion and internally plans to humiliate both Satsu and Kushida. 13

At the restaurant, Yamauchi plants fart bombs in Satsu's chair. Kushida's intervention forces a seat change, and Yamauchi ultimately sits in the trapped chair himself after Satsu pressures him to do so. 16

Bet with Sakayanagi Arisu

Yamauchi and Satsu wager over who can obtain Sakayanagi Arisu's contact information. Yamauchi approaches her first, disparages his friends to flatter her, and loses control after she ignores him in favor of Satsu. He is removed from the restaurant and must pay for his own meal. 17 18

Study Group Recruitment

Yamauchi initially rejects Class D's study session, insisting he can pass by cramming shortly before the exams. 33 When Satsu and Ayanokoji later offer him 10,000 points to attend, he attempts to negotiate for 20,000 before accepting the original amount. 47 48

Trivia

• Yamauchi prepares movie tickets in advance for his intended outing with Kushida. 11
• He spends heavily on a suit to impress others, then worries that paying for his own restaurant meal will leave him unable to last through the month. 13 18
• He publicly makes an offensive remark toward Chabashira during a pop quiz. 27
• He mistakes a visit from Class B girls as a search for boys' contact information and confidently assumes that he is their target; they are actually looking for Satsu. 36