Horikita Suzune

Biodata

Feature	Information
Name	Horikita Suzune (堀北铃音)
Gender	Female
Affiliation	Advanced Nurturing High School; Class D
Occupation/Role	Class D student; academic tutor and strategist
First Appearance	Chapter 3

Appearance

Horikita is a fair-skinned girl with long black hair, a cold expression, and phoenix-like eyes. She maintains a rigidly upright posture and usually projects an aura that discourages others from approaching her. 3 15

• Long black hair. 3
• Cold, expressionless features and sharp phoenix-like eyes. 3 19
• Consistently formal, straight-backed posture. 3 15
• Her ears redden slightly when embarrassed or caught off guard. 7 30

Personality

Horikita is proud, highly rational, and intensely conscious of Class D's poor standing. Early in the school year, she regards classmates who complain or act impulsively with open disdain, preferring to distance herself from what she considers unproductive behavior. 5 6

She is academically capable and goal-oriented, but her bluntness and impatience create conflict. During her first tutoring session with Sudo, she treats a basic problem as self-evident, provoking him by framing his inability to understand it as his own failure. 7 17

Despite her solitary nature, Horikita gradually recognizes that Class D cannot improve through individual effort alone. She takes the initiative to enlist Kazama In and Ayanokoji Kiyotaka for the midterm study effort, later accepts another opportunity to tutor Sudo, Ike, and Yamauchi, and acknowledges the class's collective progress after they pass. 15 19 20

Her older brother's criticism exposes a deeply insecure side. After Manabu harshly dismisses her efforts and calls her useless, she falls into self-doubt and accepts that she must confront her own shortcomings. 17

Abilities & Skills

Academic Instruction

Horikita has strong foundational academic knowledge, clear logic, and an organized teaching style. Kazama specifically identifies her as the best person to help struggling students understand formulas and exam material rather than merely memorize answers. 19

• Tutors Sudo, Ike, and Yamauchi ahead of the midterms. 17 19
• Explains simultaneous equations and other foundational material. 17
• Her initial teaching method is undermined by impatience and harsh phrasing. 17
• Contributes to Sudo, Ike, and Yamauchi passing their exams, helping Class D earn 105 class points. 20

Strategic Analysis

Horikita can assess threats and objectives quickly, particularly when Class D needs information or must respond to misconduct. 31 43

• Recognizes the implications of Kazama's access to old exam papers and his Student Council connections. 19 26
• Understands the hidden-camera situation at the Water Park and disapproves of Sudo's group's actions. 31 32
• Organizes a scouting mission to identify the leaders and conditions of Class A and Class C during the island survival test. 43
• Assesses Class A as disciplined and difficult to infiltrate, while identifying Ryuen as the dangerous core of Class C's disorder. 43

Background / History

Horikita enters Advanced Nurturing High School as a Class D student. From the beginning, she sits alone and remains detached from the class's attempts to socialize, treating the school's meritocratic structure as a problem to overcome rather than an excuse for complaint. 3 5

Her relationship with her older brother, Student Council President Horikita Manabu, is strained. When she approaches him regarding Class D's study group, he harshly criticizes her academic performance and inability to connect with classmates. Ayanokoji prevents the confrontation from escalating physically, while Kazama and Ayanokoji later remain with her as she processes the incident. 17

Relationships

• Kazama In — Classmate and frequent collaborator. He supports her midterm initiative, recognizes her teaching ability, helps reconcile her with Sudo, and warns Kushida not to target her. 15 19 21
• Ayanokoji Kiyotaka — Classmate with whom she has an early argument over their shared lack of social integration. They later cooperate on Class D matters and scout opposing camps together. 7 17 43
• Horikita Manabu — Older brother and Student Council President. His severe criticism causes her crisis of confidence. 17
• Kushida Kikyo — Kushida publicly seeks friendship with Horikita, but secretly harbors intense hostility and wishes to have her expelled. 7 20 21
• Sudo Ken — Initially clashes with Horikita during tutoring, including a physical confrontation. He later apologizes and asks her to teach him again. 17 19
• Ike Kanji and Yamauchi Haruki — Initially reluctant students whom Horikita eventually tutors alongside Sudo before the midterms. 19 20

Story Role / Major Arcs

Class D Isolation

Horikita initially rejects social involvement, refusing Kazama's invitation to eat with him, Ayanokoji, and Sudo after the convenience-store conflict. She views Class D's public complaints and desperation over points with disgust. 5 6

Midterm Study Group

She invites Kazama and Ayanokoji to lunch and asks them to help convince underperforming students to attend remedial study sessions. Her first attempt to teach Sudo fails due to her approach, but Kazama later guides Sudo, Ike, and Yamauchi back to her for a second chance. 15 17 19

The students pass their midterms, earning Class D 105 class points. Horikita accepts their gratitude while emphasizing that they must genuinely learn the material for future exams. 20

Kushida's Hostility

Horikita remains unaware that Kushida's friendliness masks a personal grudge tied to Horikita's knowledge of her past. Kazama discovers Kushida's intent to have Horikita expelled and uses recorded evidence to force Kushida to stop directly targeting her. 20 21

Water Park Incident

During the Class D and Class B Water Park trip, Horikita identifies Sudo's supposed leg cramp as an act and understands the implications of Ryuen exposing the hidden-camera scheme. She condemns the misconduct and remains concerned about the damage it causes to Class D's unity. 31 32 33

Island Survival Test

After Class D reaches the island, Horikita declines consideration for the leadership role. She later leads an information-gathering expedition with Ayanokoji, Kazama, and Koenji to investigate Class A and Class C's bases. 40 43