Chabashira Sae

Biodata

Affection Progression

Sae's recorded levels measure her affection toward Kitagawa Kai, rather than a cultivation realm or combat rank.

Background

Childhood

Sae liked tigers as a child and wanted one of her own. Her father brought home a white cat, telling her that it would become a white tiger if she raised it properly; she believed him. Her interest in tigers remains strong enough that she watches a white tiger intently during the Izu trip 378.

Student Years

Sae and Hoshinomiya Chie were classmates and once lived together, frequently exchanging clothes. Their class pursued graduation from Class A, with Matsui serving as its leader. Kai later describes Sae as having climbed from Class D to Class A, although she ultimately failed to graduate from the highest class 190 267 268.

During a decisive exam, Sae refused to vote to expel Matsui, whom she loved. She believed that the student who had contributed the most and shouldered the greatest responsibility should not be sacrificed just as the class approached its reward. Her refusal cost the class its chance to pass the exam and became the source of years of resentment between her and Chie 267.

Sae continued to regret the outcome without repudiating her decision. When they finally discussed it openly, she maintained that she would make the same choice again 267.

Appearance

• Hair: Black, worn in a neat high ponytail with the ends falling down her back 393.
• Usual clothing: A black business suit with a fitted skirt and high heels 34 35 189.
• Expression and bearing: Typically stern and difficult to approach, with sharp eyes and an impassive expression 35 189.
• Casual clothing: Wears a light-colored dress when exchanging outfits with Chie, and a light-colored knitted cardigan during the Izu trip 268 393.
• Change in demeanor: Her companions notice that she looks unusually gentle and radiant as her relationship with Kai develops 393.

Personality

Sae initially treats Class D with open contempt. She calls its students “defective products,” dismisses their chances of reaching Class A, and offers withdrawal forms rather than reassurance. Her desire to prove herself by leading a class upward conflicts with her habit of giving up on her students early 13 34.

She is proud, defensive, and reluctant to acknowledge emotional vulnerability. She insists that Kai's reassurance will not work on her, objects to his familiar forms of address, and later becomes upset when he returns to calling her “Teacher Chabashira.” Morishita Ai identifies this contradiction as a desire for closeness concealed beneath apparent hostility 191 240 247 249.

Her attachment to Matsui shows a loyalty that survives years of regret. With Kai, she gradually becomes more direct about wanting affection, entrusting both herself and Class D to him. Her warmer behavior eventually extends to the other students: during the Izu trip, she offers help, checks their comfort, and has an air conditioner adjusted when it blows directly at them 255 267 286 373.

Abilities & Skills

Academic and Institutional Knowledge

Sae understands the school's class-placement criteria and explains that strong academic or athletic performance does not erase a student's other flaws 35.

• Uses Koenji Rokusuke's outstanding examination results and arrogant interview to challenge Horikita Suzune's assumptions about Class D 35.
• Has staff access to student records, though Chairman Sakayanagi intervenes when she attempts to investigate his daughter 239.
• Limit: Her teaching support is unreliable early on; she supplies an incorrect examination scope and replaces it only a week before the exam 49.

Information Gathering

Sae attempts to gain leverage through questioning, recordings, surveillance, and access to school files 195 202 232 239 241.

• Offers Ayanokoji Kiyotaka 100,000 points to investigate Kai's relationship with Chie 195.
• Uses presumptive questions while recording Chie, hoping to elicit an unguarded answer 202.
• Follows Kai in disguise and looks for connections between the rings worn by women close to him 232 233.
• Limits: Ayanokoji refuses her request, Chie evades her questions, and Kai notices her surveillance and secretly switches off her recorder 195 202 232 241.

Cooking and Practical Knowledge

• Prepares dinner for Kai and explains that she usually cannot be bothered to cook, rather than being unable to do so 256.
• Explains to Ichinose Honami why carrying their own luggage at a luxury hotel could reflect badly on the staff responsible for that service 342.

Equipment & Items

• Shape-changing ring: A gift from Kai, placed on her ring finger. It changes design according to her wishes and can become transparent while remaining physically present 257.
• Voice recorder: Used in her attempt to capture Kai admitting that Chie is his girlfriend. Kai turns it off before making the admission 241.
• Pepper spray: She warns Kai that she has it when he jokes about returning to her apartment 250.
• Cigarettes: She smokes, including in front of students, but later says she has reduced her smoking and is trying to quit 201 391.

Relationships

• Kitagawa Kai — Her romantic partner and Class D's eventual manager. Their relationship develops from confrontation and attempted leverage into mutual intimacy; she explicitly entrusts herself and her class to him 190 241 254 255 256.
• Hoshinomiya Chie — Former classmate, former housemate, drinking companion, and longtime friend. Their conflict over Matsui's proposed expulsion lasts for years before they apologize and reconcile. Chie also engineers opportunities for Sae and Kai to become closer 201 267 268.
• Matsui — Her former class leader and the person she loved during her student years. She refuses to approve his expulsion and continues to defend that decision 267.
• Ayanokoji Kiyotaka — A student she pressures into secret work through threats of expulsion. He eventually rejects the tactic after discovering that a homeroom teacher lacks the authority she claims 106 195.
• Horikita Suzune — A student whose dissatisfaction with Class D prompts Sae to explain the school's assessment of personal flaws 35.
• Hirata Yosuke — Class D's representative in its arrangements with Kai. Sae initially resents being bypassed, but later tells Hirata to continue working under Kai 254 286.
• Morishita Ai — Investigates Sae on Kai's behalf and accurately recognizes the affection beneath her hostility 232 240.
• Sakayanagi Narimori — The chairman who stops her investigation into Arisu's file and warns her not to interfere with Kai's relationships 239.

Story Role / Major Arcs

Class D's Early Failures

Sae announces that Class D's repeated violations have reduced its Class Points to zero, eliminating its May Personal Points payment. She also reveals that only Class A graduates receive the promised freedom in employment and further education, and warns that failing an exam means expulsion 34.

Her early conduct compounds the class's difficulties. She provides incorrect examination guidance, refuses appeals for leniency, and later communicates Sudō's suspension during the investigation into Class C's assault accusation 49 59 86.

Borrowing Race and Emotional Breakthrough

During the Borrowing Race, Kai selects Sae for a prompt requiring a female teacher over 165 centimeters tall. Despite her refusal to participate, he carries her across the field, provoking her anger 189.

Afterward, Kai redirects her criticism about keeping failures in perspective toward her own past. His argument that one failed graduation outcome should not define her life brings her to tears. She initially rejects the intimacy of the encounter, but acknowledges his ability after he treats her injured ankle 190 191.

Chie is later revealed to have rigged every slip in the race box to point toward Sae 267.

Investigation of Kai

Sae hopes that proof of Kai's relationship with Chie will give her leverage to recruit him into Class D. Her efforts progress from questioning Chie to following Kai and searching student records, until the chairman orders her to stop investigating 201 202 232 239.

She then secretly records Kai while initiating a kiss and pressing him for a confession. He admits that Chie is his girlfriend only after switching off the recorder. Sae discovers the failed recording after returning home, but the encounter nevertheless deepens her attachment to him 241 242.

Entrusting Class D to Kai

Sae's attempt to bring Kai into Class D takes an unexpected turn when Hirata instead hands the class's decision-making authority to him. After protesting that she was bypassed, she accepts the arrangement and says she is leaving both Class D and herself to Kai 254 255.

Their relationship becomes openly romantic in private, and Kai gives her a ring. He subsequently establishes joint study sessions between Classes A and D, while Sae later endorses Hirata's continued cooperation with him 256 257 268 286.

Reconciliation and Later Support

Kai brings Sae and Chie together to discuss their shared past. Although Sae does not change her position on Matsui, the two women apologize and forgive each other, celebrating by exchanging clothes as they once did 267 268.

When a report against Kai spreads across campus, Sae joins the investigation team with Matsushita Chiaki and Mashima Tomoya. She reassures his worried companions that all three investigators support him 302 303.

During the Izu trip, Sae becomes more attentive to the students and more comfortable seeking private affection from Kai. She arranges time alone with him on a mountain summit, tries calling him “Honey,” and later spends a quiet evening reading and sleeping beside him 372 373 391.

Notable Quotes

“Everyone in Class D has a flaw of their own. You're no exception, of course.” 35

“But later, I realized that even if I had another chance, I would make the same choice.” 267

“Kitagawa Kai, I'm leaving Class D to you, and also...”

“Me too.” 255

Trivia

• The story explains that Chabashira refers to a tea stalk standing upright in a cup, regarded as a sign of good fortune and a stable, prosperous household. Kai repeatedly uses this meaning in his teasing 255.
• She says she believes favorable divination results while dismissing unfavorable ones as superstition 363.
• Despite her growing closeness with the group, Hasebe Haruka still instinctively becomes well-behaved when Sae appears in her role as a teacher 387 388.