Sakayanagi Arisu

Biodata

Feature	Value
Name	Sakayanagi Arisu (坂柳有栖)
Gender	Female
Affiliation	Advanced Nurturing High School; Class A; Sakayanagi faction 1 16
Occupation/Role	Student and leader of one of Class A’s competing factions 6 16
Family	Daughter of the school’s chairman, who is later replaced 41
Status	Attending school; mobility substantially restored following Long Aotian’s treatment 32 37 41
First Appearance	Observed by Long Aotian in the Class A classroom 1

Background / History

Enrollment and Class A Rivalry

Arisu enters Advanced Nurturing High School specifically to challenge Ayanokoji Kiyotaka. Her connection to the chairman attracts classmates seeking her favor, and she begins recruiting followers while Katsuragi Kohei builds a rival faction. Long Aotian remains neutral despite her repeated attempts to recruit him 1 6 12 16.

Chess Matches and Interest in Long Aotian

On the first day, Arisu defeats a Chess Club senior in a wagered match. She praises his ability afterward but postpones Long Aotian’s proposed challenge because she has other business 3.

She subsequently invites Long Aotian to the club by letter and accepts his demand for a 500,000-point stake. Despite countering several of his traps, she loses. She compliments his play while claiming she had only been “slightly serious”; her clenched hand and threat toward the laughing Kamuro reveal her frustration beneath the smile 5.

Arisu later pays 20,000 points for Long Aotian’s recording of Ayanokoji’s café encounter with Horikita Suzune and Kushida Kikyo. She also investigates Long Aotian’s club victories and visits to Sakura Airi’s dormitory, then proposes that the two of them rule Class A together. He rejects that proposal but offers a separate collaboration 12 16.

Extorting Class C

Their agreement involves removing a Class D student and extracting points from Class C, with the proceeds divided equally. Using a fight recording supplied by Long Aotian, Arisu forces Ryuen to sign a contract requiring him to pay her 600,000 points every month in exchange for withholding the video. Long Aotian receives a 300,000-point share of the documented payment 20.

Treatment and the Ryuen Operation

After Ayanokoji’s expulsion, Arisu tells Long Aotian that she now considers him a stronger and more suitable opponent. She also proposes another operation against Ryuen, who had threatened to crush Classes D, B, and A 32.

When Long Aotian suggests physically beating Ryuen, Arisu points out that her impaired leg prevents her from participating meaningfully. She initially distrusts his offer of treatment, explaining that numerous famous doctors have been unable to help. He nevertheless grabs and treats her legs with Medical King Healing Touch despite her objections. Her subsequent steps are noticeably steadier, bringing her to tears. In gratitude, she pledges that the Sakayanagi family will regard him as an honored guest and commit its resources to helping him 32.

Arisu assigns followers to track Ryuen and accompanies Long Aotian and Kamuro to a surveillance-free KTV. After Long Aotian defeats Ryuen, Ibuki, and Yamada, she enters and kicks Ryuen herself 34.

At the resulting student council hearing, Arisu pushes Long Aotian’s wheelchair and participates on the purported victims’ side. Her light, steady gait astonishes Horikita Manabu. She sees through Long Aotian’s exaggerated presentation of his injuries and finds the ensuing compensation dispute highly entertaining; the council orders a one-million-point settlement 37 38.

Chairman’s Replacement

Following Ayanokoji’s return, Arisu visits Long Aotian and reveals that her father has been replaced as chairman. She suspects that the people backing Ayanokoji may be responsible, but this connection remains unconfirmed 41.

Appearance

• Hair: Short and white 3.
• Complexion: Fair-skinned 1.
• Clothing: Commonly wears a beret with her school uniform 1 3 5.
• Bearing: Maintains a dignified posture and carefully composed, elegant movements 32 34.
• Mobility: Initially frail, with weak legs requiring a cane. After treatment, she continues carrying it even when it has become dispensable; her later gait is light and steady 1 32 34 37.

Personality

Arisu is confident, competitive, and openly proud of her intelligence. She calls both herself and Long Aotian geniuses and seeks opponents capable of challenging her. Her composure can conceal wounded pride: after losing their chess match, she smiles and praises him while privately clenching her hand 5 16 32.

She enjoys manipulating rivals and watching plans unsettle them. Ryuen’s threats inspire her to “toy with” him, and she delights in Long Aotian’s ability to defeat opponents and then demand compensation from them. She also dismisses his appeal to fate as an excuse for avoiding responsibility 32 38.

Her leg impairment exposes a more vulnerable side. She envies people who can run freely and has long wished for healthy legs. The improvement following treatment breaks through her usual restraint, prompting tearful thanks and a solemn promise of family support 32.

Abilities & Skills

Chess

Arisu is an accomplished chess player whose calm, deliberate style puts considerable psychological pressure on opponents 3.

• Defeats a senior Chess Club member in a points wager 3.
• Recognizes and dismantles multiple traps during her match against Long Aotian 5.
• Ultimately loses their documented 500,000-point match 5.

Investigation and Strategic Analysis

Arisu gathers detailed information about students she considers interesting or potentially dangerous 12 16.

• Investigates Long Aotian’s point earnings, club activities, and visits to Sakura’s dormitory 16.
• Suggests that Sakura may be his informant in Class D or someone he intends to transfer into Class A 16.
• Purchases footage concerning Ayanokoji 12.
• Recognizes Long Aotian’s deceptive performance during the Ryuen hearing 37.

Leadership and Negotiation

Arisu combines a student faction with information-based leverage to influence class conflicts 6 20.

• Recruits classmates in competition with Katsuragi 6 16.
• Directs followers to monitor Ryuen’s movements 34.
• Converts incriminating footage into a recurring 600,000-point payment contract 20.
• Offers access to her family’s resources after her treatment; no later fulfillment of that pledge is documented 32.

Equipment / Items

• Cane — Her initial mobility aid; she still carries it after her legs improve 1 32 34.
• Beret — A recurring part of her appearance 1 3 5.
• Ryuen’s payment contract — Requires monthly payments of 600,000 points in exchange for withholding the fight video 20.
• Purchased café recording — Footage of Ayanokoji, Horikita, and Kushida obtained from Long Aotian for 20,000 points 12.

Relationships

• Long Aotian — Classmate, chess opponent, and collaborator. Her unsuccessful recruitment develops into joint operations; his treatment of her legs earns profound gratitude and a pledge of family assistance 5 16 20 32.
• Ayanokoji Kiyotaka — Her intended rival and original reason for enrolling. After his expulsion, she proposes Long Aotian as a replacement opponent; his return coincides with her concerns about the chairman’s replacement 12 32 41.
• Kamuro Masumi — Assistant who handles errands and accompanies her during operations. Arisu threatens to expose Kamuro’s secrets after being mocked, but also gives her time off 5 32 34.
• Katsuragi Kohei — Rival faction leader competing for support within Class A 6 16.
• Ryuen — Class C adversary whom she coerces into recurring payments and later targets alongside Long Aotian 20 32 34.
• Her father — The school chairman until his replacement. Arisu suspects his removal is connected to Ayanokoji’s backers 41.

Notable Quotes

“Strong and clever—you're a genius just like me. I think Class A should be ruled by the two of us.” 16

“That kind of talk is nothing more than an excuse people use to shirk responsibility.” 32