Sakayanagi Arisu

Biodata

Feature	Value
Name	Sakayanagi Arisu (坂柳有栖)
Alias(es)	“Her Highness”; “Princess,” as used by Masayoshi Hashimoto 11 19 20
Gender	Female 2
Affiliation	Advanced Nurturing High School, Class 1-A 2
Occupation/Role	First-year student; leader of Class A 2 10 14
First Appearance	Chapter 2, “Entering Class 1-A” 2

Appearance

Arisu is a petite, physically frail girl whose composed expression contrasts with her restricted mobility 2 3.

• Hair: Silver, brushing against her shoulders 2.
• Eyes: Violet-gray 2.
• Height: Reaches approximately Toru Hasegawa’s chest when standing beside him 3 7.
• Mobility aid: Carries a light gray cane, using it to stand and walk 2 3.
• Physical limitations: Cannot circulate around the classroom as freely as Katsuragi. After sitting through the chess matches, her legs weaken when she stands, and Toru catches her before she falls 2 8.

Personality

Arisu maintains a courteous, unhurried manner even when challenging upperclassmen or addressing a crowd. Her confidence is backed by careful preparation: she records her teacher’s initial explanation, conceals her full chess strength, and presents information when it will have the greatest impact 8 9 14.

Her principal ambition is to defeat Ayanokoji Kiyotaka. Early in the story, she explicitly regards classmates as tools rather than friends, gathering useful people around herself to support that confrontation. Toru’s intelligence makes her increasingly reluctant to release him from her influence 10 12 16.

She uses money, class pressure, secrets, and threatened rumors to obtain cooperation, but her control is not absolute. Toru successfully negotiates limits on his work, refuses her proposed fake relationship, and challenges the sincerity of her apology. She later acknowledges neglecting her classmates’ improvement and offers to share her notes 11 12 17 24 37.

Abilities & Skills

Chess

Arisu defeats the school’s Chess Club members, including its president, and grows her personal-point balance to 800,000 during the visit 8.

• Proposes a 100,000-point wager at the outset 8.
• Conceals her true strength, appearing only slightly better than each opponent 8.
• Induces the club president to underestimate her despite his noticing that she held back in earlier games 8.
• Treats chess as her favorite game and compares her intended partnership with Toru to a king commanding a queen 16.
• Toru speculates that she may be national- or world-class; no formal chess ranking is established 12.

Analysis of School Rules

Arisu identifies implications in the school’s introductory explanation that other students overlook 9 12.

• Recognizes that the initial equal distribution of 100,000 points does not guarantee the same allowance every month 9.
• Connects the school’s emphasis on ability with points representing its evaluation of students 9.
• Deduces that the opening trial assesses everyday conduct and students’ basic responsibilities 9.
• Uses a request to purchase the rules to make Mashima confirm that a trial is underway. He quotes one million points, but she does not buy the information, explaining that she has already inferred what matters 9.

Leadership and Manipulation

Arisu takes control of Class A by demonstrating superior knowledge of the school and displaying the points she won from upperclassmen 9 10.

• Directs Toru to investigate other classes, prioritizing Class D because Ayanokoji is there 11.
• Uses classmates’ approval and the prospect of class failure to pressure Toru into cooperating 11.
• Records negotiations herself, including the agreement limiting Toru’s intelligence work to one week 12.
• Attempts to use a romantic rumor to bind Toru to her; he refuses, and the rumor never appears 17.
• Faces resistance when Hashimoto publicly defends Toru against her accusation of betrayal 35.

Equipment / Items

• Light gray cane — Her regular aid for standing and walking 2 3 8.
• School-issued phone — Used for messages, recordings, and point transfers. Her recording of Mashima’s first-day explanation becomes central to her takeover of Class A 7 8 9.
• Personal points — Uses them as chess stakes and compensation for assistance. After reaching 800,000 points, she transfers 100,000 to Toru for finding the club and covering a shortfall in her wager 8.

Relationships

• Toru Hasegawa — Classmate, intelligence-gathering partner, and resistant would-be subordinate. She values his insight enough to imagine him as the “queen” to her “king,” while he repeatedly pushes back against her coercion. Despite their disputes, they eventually eat lunch together daily 11 12 16 17 38.
• Ayanokoji Kiyotaka — Her chosen rival and someone connected to her past. At their reunion, she states that it has been eight years and fifty-one days since they last met. Finding him at school prompts her to accelerate her takeover of Class A 5 10.
• Katsuragi Kohei — Initial competitor for class leadership. His advice to conserve points is overshadowed by her more comprehensive explanation of the school’s evaluation system 2 9 10.
• Masumi Kamuro — A member of her team who carries out assignments and supplies information. Kamuro finds the workload stressful, but later reports that Arisu has begun treating her better 12 21 38 45.
• Masayoshi Hashimoto — Early follower who addresses her as “Her Highness.” After learning more about her priorities from Toru, he becomes less unquestioningly loyal and publicly supports Toru, surprising Arisu 19 20 35.
• Hayato Kito — Part of the group gathered around her, appearing at lunch with Arisu, Kamuro, and Hashimoto 21.
• Mashima Tomoya — Class A’s homeroom teacher. She uses his recorded words and carefully framed questions to expose the opening trial’s existence 9.

Story Role / Major Arcs

Enrollment and Reunion

Arisu first appears contesting Class 1-A’s leadership with Katsuragi, though Satoshi Satonaka interrupts their exchange. After the entrance ceremony, she accompanies Toru to the convenience store and encounters Ayanokoji. The reunion redirects her immediate plans toward building a class capable of confronting him 2 4 5 10.

Establishing Control of Class A

With Toru’s assistance, Arisu challenges the Chess Club and obtains a substantial point reserve. The following morning, she combines that financial display with a recording of Mashima’s explanation to demonstrate her understanding of the school. Her presentation wins the class’s admiration and decisively establishes her leadership 8 9 10.

At club orientation, Toru publicly introduces her as Class A’s leader and draws attention to her mysterious connection with Ayanokoji. She handles the unexpected attention without stage fright. She subsequently applies to the Student Council and attends an interview; the supplied chapters do not establish her admission 14 16 23.

Resistance Within Her Group

Arisu’s efforts to retain Toru lead to a negotiated one-week intelligence assignment, a failed rumor threat, and an apology accompanied by a spoiled homemade bento. Toru later confronts her over both the bento’s lack of care and her attempts to influence him through others 12 17 24.

When Toru reveals exam information to Class D, she suspects that he may be acting as Ayanokoji’s smokescreen. She then labels him a traitor before Class A, only for Hashimoto to defend him and weaken the accusation’s impact 35.

Adjusting Her Leadership

Following Toru’s call for proactive study and exercise, Arisu admits her oversight and agrees to share her notes. Kamuro later notices improved treatment, while Arisu hints that her strategy is changing. She retains authority over Class A, but capable classmates increasingly judge her by whether she can deliver results 37 45.

When Mashima announces the first class-point standings, Class A leads with 980 points. Arisu watches the ensuing discussion without intervening 48.

Favorability Readings

These values are visible to Toru, who interprets them as favorability toward him. They are not Arisu’s power levels, and an increase does not establish romantic affection 4 8 11.

Reading	Chapter	Context
10/100	2	Initial reading during the leadership dispute with Katsuragi.
9/100	4	Falls after Toru explains his classroom remarks about personal preferences.
30/100	4	Rises after Toru comments on her unusually flushed complexion during the encounter with Ayanokoji.
40/100	8	Reading at the end of their first day together, following the Chess Club visit and dinner.
45 → 50/100	11	Rises as Arisu expresses increasing interest in Toru’s usefulness.

Notable Quotes

“It isn't a position like class representative that I'm looking to obtain, but... I suppose I'll let it go for now.” 2

“Happy cooperation. But be careful, I'm not the type to give up easily.” 12