Oreki

Biodata

Feature	Details
Name	Oreki Houtarou (折木)
Alias(es)	Houtarou
Gender	Male
Affiliation	Class A, Advanced Nurturing High School 3
Occupation/Role	Student; strategist and investigator; Class A leader in the Sakayanagi IF Route 45
First Appearance	Sakayanagi Arisu's Thoughts (1) 1

Background / History

Oreki arrives at Advanced Nurturing High School after receiving instructions from his older sister to attend, despite remembering that he never applied to the school. He later concludes that he has likely been transported into another world. 38

On the first morning, he meets Sakayanagi Arisu at a bus stop. Though he immediately tries to avoid her influence and the trouble surrounding her, the two are repeatedly drawn together—first by a sabotaged bus, then by the entrance-ceremony power outage. 1 3

Appearance

Oreki is a gray-haired, handsome student whose usual listless demeanor and apparently frail frame obscure his actual physical ability. 11 18 34

• Gray hair, noted as uncommon. 18
• Often appears sleepy, bored, or unmotivated. 2 9
• Described as handsome despite his lazy bearing. 11
• Wears pajamas when sleeping. 23

Personality

Oreki follows an energy-conservation philosophy: he avoids exertion, dislikes social complications, and prefers sleep or rest whenever possible. He initially treats Sakayanagi’s attention, class politics, and investigations as exhausting inconveniences. 1 2 24

Despite this apathy, Oreki becomes highly engaged when faced with a mystery, an unusual opponent, or a situation that threatens someone within his circle. He is observant, calculating, and willing to fabricate a convenient explanation, set traps, or manipulate others when he considers it necessary. 3 4 35

Oreki particularly hates being used as another person’s pawn. In the Sakayanagi IF Route, his concern for Arisu overrides his usual restraint, making him increasingly forceful, emotionally vulnerable, and willing to abandon Class A’s interests to find her. 48 49

Abilities & Skills

Deduction and Observation

Oreki rapidly notices details others overlook and uses them to reconstruct incidents or assess people.

• Predicted that the school’s initial 100,000-point grant would be a one-time benefit tied to future student performance. 2
• Investigated the entrance-ceremony blackout through surveillance footage and clues at the gymnasium. 3
• Identified the significance of the tennis ball and caught Kiyoko’s momentary reaction during their tennis match. 10 12
• Determined the art-gallery incident’s truth but recognized that a deduction without evidence remained only a theory. 37
• Noticed that a supposedly old notebook lacked dust, exposing it as a replacement rather than the real registry. 28

Strategy and Manipulation

Oreki builds information networks, creates contingencies, and uses opponents’ behavior to his advantage.

• Trained a crow through a reward mechanism to support a fabricated explanation for the gymnasium incident. 4
• Protected Karuizawa Kei in exchange for information on Ayanokoji Kiyoko. 5
• Recruited Hashimoto Masayoshi away from Sakayanagi’s side, though he remained wary of Hashimoto’s shifting loyalties. 35 36
• Set an ambush with Hashimoto during his confrontation with Kiyoko and arranged for Ichinose Honami to intervene with a recording. 37
• Correctly deduced the leaders of all four classes during the weekly test, including Ryuen Kakeru’s deceptive role as Class C’s leader. 46

Technical Investigation

Oreki uses technology and covert evidence-gathering to pursue cases.

• Hacked into the school surveillance system to trace an anonymous letter. 18
• Recorded an upperclassman’s misconduct to force Karuizawa’s bullies to leave. 4
• Modified a shirt pocket with a camera-sized opening to secretly record Sakura Tanaka’s incriminating conversation. 28
• Used a telescope to observe activity around the dormitory during the investigation involving Sakura Airi and Kiyoko. 16

Physical Ability

Though unwilling to exercise without a reason, Oreki is physically capable when pressed.

• Held his own in an intense tennis match against Kiyoko and won when a gust of wind affected the final exchange. 11
• Is described as having decent physical fitness despite his normally inactive lifestyle. 17
• Blocked Hashimoto’s punch and struck him hard enough to leave him stunned in the Sakayanagi IF Route. 42
• Knocked out an art-gallery associate with a single blow in the Sakayanagi IF Route. 43

Equipment / Items

• Student terminal — Functions as Oreki’s student ID, phone, and Private Point account; it initially displays 100,000 points. 3
• Private Points — Sakayanagi transfers Oreki more than five million points, later also giving him 300,000 yen to purchase a replacement phone. 9 33
• Bluetooth headphones — Purchased for 20,000 points. 4
• Bicycle — Oreki’s preferred campus transportation; he considers it less conspicuous than Kamuro’s motorcycle. 17
• Modified phone pocket — Used to covertly capture audio and video evidence during the art-gallery investigation. 28
• Sakayanagi’s beret — Given to Oreki by Kamuro for use as leverage in a difficult situation. 26

Relationships

• Sakayanagi Arisu — Classmate, frequent investigative partner, and political ally. Oreki resists her manipulation but gradually develops feelings for her; in the Sakayanagi IF Route, they confess to each other. 1 24 32 41
• Karuizawa Kei — Informant and protected associate from Class D. Their relationship begins as an exchange of protection for intelligence on Kiyoko, later becoming a publicly presented fake relationship. 5 12 13
• Ayanokoji Kiyoko — Primary rival and investigative target. Oreki recognizes her as a dangerous, highly perceptive opponent and repeatedly attempts to uncover her motives. 5 12 37
• Shiina Hiyori — Mystery-minded investigative partner from Class C. She volunteers to become Oreki’s assistant on the art-gallery case. 19 24 28
• Hashimoto Masayoshi — A strategically valuable but unreliable ally whom Oreki recruits from Sakayanagi’s faction. 35 36
• Kamuro Masumi — Sakayanagi’s associate who intermittently assists Oreki, including aiding him during the Sakayanagi IF Route. 26 48
• Katsuragi Kohei — Class A rival initially suspicious of Oreki; Katsuragi’s influence declines when Oreki assumes leadership during the weekly test. 6 45
• Ichinose Honami — Class B leader who intervenes in Oreki and Kiyoko’s confrontation; Oreki regards her with mutual respect. 37 38

Story Role / Major Arcs

Gymnasium Power-Outage Incident

Oreki is recruited by Sakayanagi to investigate the entrance ceremony’s blackout. After identifying the tennis ball involved, he helps construct a crow-based explanation rather than exposing the student connected to the incident. 3 4

Karuizawa Protection and Kiyoko Investigation

After stopping upperclassmen from bullying Karuizawa Kei, Oreki agrees to protect her from further harassment in exchange for her surveillance of Ayanokoji Kiyoko. He joins the Tennis Club specifically to assess Kiyoko, facing her in a competitive match before withdrawing from the club. 4 5 9 11

Art-Gallery Investigation

Oreki investigates a painting theft and related incidents involving Sakura Tanaka, the gallery’s registry, anonymous letters, and Kiyoko’s interference. He works with Shiina Hiyori, hacks surveillance systems, gathers covert recordings, and ultimately deduces the case’s mechanism while seeking conclusive evidence. 18 19 27 28 40

Class A Maneuvering

Oreki temporarily sides with Sakayanagi while also recruiting Hashimoto and considering Shiina as a future ally. His attempt to counter Kiyoko escalates into a confrontation interrupted by Ichinose. 24 35 36 37

Sakayanagi IF Route

After confessing to Arisu, Oreki is devastated by her departure and expulsion. He takes leadership of Class A for the weekly test, correctly identifies every class leader, and achieves a top score, but ultimately places finding Arisu above the competition itself. 41 42 45 46 48 49

Notable Quotes

“Somewhere I can get away from trouble.” 1

“I hate being used more than anything...” 48