Ayanokoji

Biodata

Feature	Value
Name	Ayanokoji Kiyotaka (Ayanokoji) 6
Species/Race	Human
Gender	Male
Affiliation	Class 1-D, Advanced Nurturing High School 3 6
Occupation/Role	Student
Status	Enrolled
First Appearance	Chapter 3 (unnamed) 3

Background / History

Before entering Advanced Nurturing High School, Ayanokoji had experiences connected to an unnamed “that place.” When Hoshino approaches him, Ayanokoji initially suspects that Hoshino may be an assassin sent from there; this suspicion makes him guarded despite agreeing to talk. 6

He first comes to Hoshino’s attention when he effortlessly pulls Sudō away from an altercation with upperclassmen. Hoshino is unsettled by both Ayanokoji’s strength and his detached demeanor. 3

Appearance

Ayanokoji is a plain-looking, poker-faced student whose expression rarely changes. 3 12

• Commonly sits in the back corner of the Class 1-D classroom. 5 6
• Has solid, visibly trained arm muscles that Hoshino considers the product of specialized exercise rather than casual activity. 16
• Usually maintains an expressionless face, even in awkward or tense exchanges. 6 12

Personality

Ayanokoji is quiet, socially awkward, and difficult to read. During his first conversation with Hoshino, he struggles to sustain ordinary small talk, but his initial caution suggests that the awkwardness does not equal naivety. 6

He generally avoids drawing attention to himself and presents himself as an ordinary student. Hoshino repeatedly notices inconsistencies in that façade, including controlled test scores, unusual physical ability, and rare but deliberate interventions in class matters. 14 16 21

Though he claims to have no interest in reaching Class A, he encourages Hoshino to contribute to Class D and appears more invested in the class’s advancement than he admits. 34

Abilities & Skills

Academic Ability and Score Control

Ayanokoji completes assigned work rapidly and is capable of precisely regulating his apparent academic performance.

• Finished homework at high speed with little visible deliberation when Hoshino first approached him. 6
• Scored exactly 50 points in every subject on the diagnostic test, leading Hoshino to conclude that he deliberately controlled his scores. 14
• Helped organize study sessions and secure past examination papers for struggling Class D students before the midterms. 21

Physical Ability

Ayanokoji possesses strength and athleticism that exceed his unassuming appearance.

• Easily restrained Sudō during the confrontation with upperclassmen. 3
• Has a notably trained physique despite claiming that he did not exercise much in middle school. 16
• Ranks near the top of Class D in swimming ability but deliberately holds back during competition. 28

Observation and Concealment

Ayanokoji notices details and secrets while revealing little about his own motives.

• Notices Hoshino’s unusual behavior and unusually takes the initiative to ask about it. 12
• Knows a secret concerning Kushida and later discloses it to Hoshino. 25
• Avoids discussing his apparent connection to Student Council President Manabu Horikita. 30 33
• Hoshino suspects that Ayanokoji has a private arrangement with Chabashira-sensei related to Class D’s promotion. 34

Relationships

• Hoshino Hoshiya — Hoshino approaches him seeking friendship; their early interactions are awkward, but they gradually become familiar enough to discuss class matters and personal suspicions. 6 12 34
• Horikita Suzune — His seatmate and study-session partner. They work together to prepare Class D students for exams and take part in resolving Sudō’s expulsion crisis. 16 21 23
• Kushida — Maintains a rapport with her despite knowing one of her secrets; Hoshino observes that Ayanokoji remains guarded around her. 11 25 38
• Sudō Ken — Initially pulls him away from a fight, then contributes to the efforts that keep him from expulsion. 3 21 23
• Chabashira Sae — Appears to be someone Chabashira favors or relies upon, though the nature of their possible agreement is undisclosed. 24 34
• Manabu Horikita — Their connection is implied when Manabu becomes unusually silent at Ayanokoji’s mention; Ayanokoji later refuses to explain it to Hoshino. 30 33

Story Role / Major Arcs

Early Class D Period

Ayanokoji is introduced as the quiet student who stops Sudō’s fight with upperclassmen. Hoshino subsequently seeks him out, and their first café conversation establishes Ayanokoji’s guarded nature and lack of social fluency. 3 6

Hidden Ability Suspicion

Hoshino’s suspicions grow after noticing Ayanokoji’s exact 50-point scores in every diagnostic-test subject and his trained physique. Ayanokoji continues to downplay his ability even when Hoshino directly questions him. 14 16

Midterm Preparation and Sudō’s Expulsion

Alongside Horikita, Ayanokoji organizes study sessions and provides past exam materials, allowing many struggling students to approach the midterms calmly. When Sudō faces expulsion, Ayanokoji participates in the effort to preserve his place in Class D. 21 23

Kushida’s Secret

After Hoshino accidentally sees Kushida grabbing Ayanokoji by the collar, Ayanokoji explains that he knows a secret about her. Hoshino chooses to feign disbelief rather than involve himself further. 25

Student Council Hearing

During the Class C dispute involving Sudō, Ayanokoji and Horikita appear as Class D’s only representatives at the final reconciliation hearing. Their presence and Class C’s sudden willingness to withdraw the case leave Hoshino suspicious of what happened behind the scenes. 48