Horikita

Biodata

Feature	Information
Name	Horikita Suzune (堀北 鈴音)
Gender	Female
Affiliation	Class D, Tokyo Metropolitan Advanced Nurturing High School 1
Occupation/Role	Student; Class D's selected leader during the uninhabited-island special exam 34
First Appearance	Chapter 1

Background / History

Horikita enrolls in Class D and is seated beside Chiba Yu, with Ayanokoji Kiyotaka seated nearby. Chiba immediately identifies her as someone likely to bring trouble, while Horikita initially gives little attention to either boy. 1 3

She keeps others at a distance early in the school year. She refuses Kushida Kikyo's offer of friendship, leaves a planned café meeting early, and later tells her brother that Ayanokoji and Chiba are only classmates rather than friends. 4 14

Her older brother, Student Council President Horikita Manabu, challenges her detached outlook and urges her to struggle toward a higher class. This pressure, along with Class D's academic crisis, drives her to become more involved in the class's affairs. 13 14

Appearance

Horikita has black hair and resembles her older brother, Manabu. 13 18

• Her black hair is described as beautiful when she speaks with Chiba after Sudō's reinstatement. 18
• She commonly stands with her arms crossed when assessing others or confronting a situation. 38 65

Personality

Horikita is blunt, solitary, and intensely self-reliant. She initially regards socializing and group study as distractions, believing that weaker students may simply hold the class back. Her direct criticism of Sudō's academics escalates into a public argument. 4 12 14

She is ambitious and determined to reach a higher class, but her confidence can become arrogance. Chiba directly identifies her tendency to treat others as obstacles and push them away, while Ayanokoji later notes that she underestimates Chiba's value to the class. 15 50

Despite this, Horikita repeatedly takes responsibility in high-pressure situations. She contributes her personal points to save Sudō, accepts the island-exam leadership role, confronts Ryūen over Ibuki's injuries, and pursues Ibuki alone to recover her stolen key card. 17 18 34 39 52

Abilities & Skills

Academic Ability

Horikita is among Class D's strongest students academically and appears at the top of the class's quiz-results list. 8

• Pressures Chiba and Ayanokoji to raise their borderline quiz scores. 7
• Prioritizes studying and exam preparation, even when it isolates her from classmates. 9 12
• Uses her academic competence as part of her claim that weaker students should not dictate Class D's future. 14

Strategic Planning

Horikita is willing to devise risky, psychologically driven strategies against other classes.

• Plans to lure Ishizaki and his companions into confessing that their accusations against Sudō were false. 21
• Brings a voice recorder to support the operation. 22
• Her plan is dismantled when Ryūen intervenes and exposes its lack of legally reliable evidence. 22
• Is selected as Class D's leader for the uninhabited-island special exam because classmates consider her responsible and inconspicuous enough for the role. 34

Resolve and Endurance

Horikita continues acting despite physical exhaustion and setbacks.

• Challenges Ryūen over his treatment of Ibuki and Kaneda. 39
• Chases Ibuki through heavy rain to retrieve her key card after suspecting her of theft and arson. 52
• Is badly outmatched during the confrontation; Ibuki's repeated attacks leave her unable to move before Ayanokoji arrives. 52

Relationships

• Ayanokoji Kiyotaka — Classmate and frequent collaborator. They work together on the attempt to clear Sudō and regularly debate Class D's direction, though Horikita is often irritated by his detached manner. 4 14 17 22
• Chiba Yu — Classmate whose hidden ability and apparent apathy frustrate her. He criticizes her habit of dismissing others, contributes to saving Sudō, and repeatedly clashes with her over his role in the class. 7 15 18 50
• Horikita Manabu — Her older brother and the Student Council President. Their tense relationship centers on his harsh demands that she become stronger and rise to a higher class. 13 14
• Kushida Kikyo — A classmate whose attempts at friendship Horikita rejects. Horikita's hostility toward Kushida remains apparent during the midterm period. 4 15
• Sudō Ken — A classmate she openly criticizes for neglecting his studies. Although their conflict is heated, she contributes 50,000 points to prevent his expulsion. 12 17 18
• Ryūen Kakeru — A hostile rival from Class C. Ryūen defeats her plan in the Sudō case, taunts her during the island exam, and exploits the theft of her leader key card. 22 23 38 53
• Ibuki Mio — Initially accepted into Class D during the island exam, but later revealed as the thief of Horikita's key card and the arsonist. Ibuki defeats Horikita in their confrontation. 36 52

Story Role / Major Arcs

Class D's Academic Crisis

Horikita investigates Chiba's apparent knowledge of the school's point system and becomes increasingly concerned with Class D's poor academic performance. She initially resists involving herself with failing students, but Chiba challenges her belief that expelling weaker classmates would benefit the class. 7 14 15

When Sudō is expelled for failing by one point, Horikita joins Ayanokoji and Chiba in paying 50,000 private points each to reverse the penalty. 17 18

Sudō Assault Case

Horikita leads the attempt to prove Sudō acted in self-defense against Class C. Her plan to pressure Ishizaki's group into confessing collapses when Ryūen intervenes and discredits the recording she obtained. 21 22

Class C later withdraws the complaint unexpectedly. Horikita is left shocked and suspicious that Ayanokoji acted behind her back, while Ryūen implies that an unknown Class D student manipulated the outcome. 23

Uninhabited-Island Special Exam

Class D selects Horikita as its designated leader. She scouts competing classes with Ayanokoji, Chiba, and Karuizawa, and directly confronts Ryūen over his treatment of students who defied him. 34 38 39

After Ibuki steals Horikita's key card and sets fire to Class D's camp, Horikita pursues her alone in a storm. Ibuki confirms the theft, defeats Horikita, and delivers the card to Ryūen, who uses it in a deal with Katsuragi. 52 53

Upon the exam's conclusion, Class D credits Horikita as the central reason they avoided defeat and praises her performance, though she leaves the celebration abruptly. 56

Notable Quotes

“I would prefer it if you didn't bother me. I won't cause any trouble for the class.” 4

“They... they aren't my friends. We are just... classmates.” 14

“If that happens, the good students will remain, and it will be easier to promote to a higher class.” 14