Kana Miyashita (宮下 佳奈) is a first-year student at Kuromata High School, Class 1-3, and the character author Masaoki Shindo describes as the "pure, undistilled high school girl" of the cast — the most realistic student perspective in a series where several of her classmates are anything but typical. She is 16 years old (notably older than most of her Class 1-3 peers), 161 cm tall, blood type A, birthday May 11th, and from Tokyo.
She tutors her friends with an intensity that earned her the nickname "Professor Miyashita." She stayed with Ruri in the nurse's office after the venom collapse despite having a commute back to Tokyo. She admitted, when Ruri asked for honest opinions, that she initially found Ruri "a little scary" — which Ruri valued more than a comfortable reassurance would have been. She later asked Ruri, during the Frost crisis: "How will you show you're serious?"
She is the person in the friend group who does not make things easier than they are. She makes them clearer. For Ruri, navigating a transformation that most people around her are treating with either excessive caution or excessive enthusiasm, having someone who gives her the honest version is the most useful thing available.
Miyashita is a teenage girl standing at 161 cm with dark hair consistently worn in a high, bouncy ponytail — her most immediately recognisable visual trait. Her facial expressions default to calm or slightly serious, reflecting her studious baseline. She is most frequently seen in the standard Kuromata High School uniform: dark blazer, white button-down shirt, necktie, plaid skirt. During the Sports Festival she wore the class-branded black "Dragon" t-shirt with a splash design and the number 3 on the back.
The author's intention was for her design to communicate the "pure, undistilled high school girl" — visually ordinary in the best possible sense, the realistic student amid the supernatural cast.
Miyashita is studious, principled, blunt without being cruel, and firmly committed to the position that people should make an effort to find the good in their circumstances rather than opting out of them. She applies this belief to her own school life and to other people's, with the specific patience of someone who has decided this is worth teaching rather than just living.
The Academic Discipline
She is one of the top students in her class and takes her tutoring role seriously enough that her friends gave her the nickname "Professor Miyashita" for the intensity of her teaching style. She does not coast through the material with her students. She pushes them. When Ruri was behind from a week-long absence, Miyashita pushed her through material in rounds. She noted out loud that Ruri was slow at absorbing it. She kept going.
The Realist
She admitted she initially found Ruri a little scary. She said so when Ruri asked for honest opinions. She asked Ruri, during the Frost crisis, how she planned to show she was serious about staying at school — not offering comfort but demanding accountability. Ruri found these responses more useful than reassurance would have been. There is a specific function in a friend group for the person who gives you the accurate answer rather than the comfortable one. Miyashita fills it.
The Principle About Effort
When Kurama told her nothing at school was enjoyable, she told him directly: "Instead of claiming that nothing's enjoyable and walking away from it all... just make an effort to find the fun." This is her core position applied to someone else's cynicism. She holds it consistently across contexts — with Ruri, with Kurama, and presumably with herself in the situations that require it.
Secret Fear
Her social media follower count suddenly blowing up. She is terrified of this. For the "pure, undistilled high school girl," this is the most accurate possible fear — specific, ordinary, entirely understandable if you think about what a suddenly viral follower count would actually involve.
Tutoring and Academic Recovery — Chapters 9–13
Miyashita's prominent introduction came during the group study sessions at a family restaurant after Ruri's fire-breathing medical absence. She took charge of Ruri's academic recovery — pushing her through rounds of material at a pace Ruri found overwhelming, keeping track of what was covered and what remained, refusing to slow down on the grounds that the material needed to be covered. She was noted out loud, to Ruri, for being slow at absorbing the content. She continued teaching anyway. By the end of the session the material was covered.
The Venom Collapse — Chapter 19
When Ruri manifested venom and passed out during a committee meeting, Miyashita stayed with her in the nurse's office alongside Yuka Hagiwara until Umi Aoki arrived — despite having a commute back to Tokyo. Umi told Ruri she owed them both significantly. Miyashita did not make the stay into a declaration. She simply stayed.
The Honest Opinions — Chapters 30–32
When Ruri asked her friends for honest opinions on how her dragon traits affected their daily school life, Miyashita was one of the few people who admitted the truth: she had initially found Ruri a little scary. Ruri valued this more than a comfortable denial would have been. The specificity of the admission — not "I never found you scary" but "I initially did and I'm telling you that" — is the kind of honesty that makes the resulting friendship feel grounded rather than performed.
The Frost Crisis Consultation — Chapter 39
As Ruri struggled with the Frost trait and faced the class ground rules meeting about whether she was too dangerous to remain at school, she consulted with Miyashita individually. Miyashita did not give her an easy answer. She asked: "How will you show you're serious?" This was the question that helped Ruri find her resolve — not reassurance, not comfort, but an accountability question that assumed Ruri could answer it.
Tutoring Kurama — Chapter 41
Miyashita is shown tutoring a cynical classmate named Kurama in the library. When he expressed the position that nothing at school was enjoyable, she delivered a firm lecture on the importance of effort over disengagement. By the end of the session he admitted they had made real progress and showed a slight shift in attitude. Her approach to Kurama mirrors her approach to Ruri: she does not accept "this is too hard" as a final answer, and she does not soften the expectation to make it easier to decline.
Ruri Aoki — Academic Mentor and Hard Truths Friend
Miyashita provides Ruri with two things simultaneously: the academic infrastructure to stay enrolled and the honest perspective to stay sane. She pushed her through missed material, stayed in the nurse's office after the venom collapse, admitted she had initially found Ruri scary, and asked her how she planned to show she was serious about staying at school. Both the tutoring and the accountability are forms of respect — she does not lower the bar for Ruri because Ruri is a half-dragon going through something difficult. She maintains the bar and helps Ruri reach it.
Airi Kashiro, Yuka Hagiwara, Asuka Mikura — Core Social Circle
The study group and social circle Miyashita operates within. She frequently takes the lead in academic settings, with Airi and Yuka deferring to her on study structure. The dynamic is warm and established — they are regular fixtures in the same Starbucks and family restaurant sessions, the same committee and festival activities, the same nurse's office stays when someone passes out.
Kurama — Tutoring Mentee
A cynical classmate she tutors in the library. He came in with the position that nothing at school was enjoyable. She challenged this directly. He shifted slightly. The relationship is brief in the narrative but illustrates that her approach to Ruri — demand effort, refuse to accept disengagement as a final answer — is consistent rather than situational.
- Miyashita's birthday is May 11th, her blood type is A, and she stands at 161 cm. She is 16 years old — notably older than most of her Class 1-3 peers, including Ruri and Yuka who are 15. She is from Tokyo, which is the reason her commute home from the nurse's office after the venom incident was particularly significant: it is not a short trip.
- Author Masaoki Shindo intended her as the "pure, undistilled high school girl" of the cast — the character who represents the most realistic, ordinary student perspective. In a class that includes a half-dragon, a Bureau monitor, and a track athlete who runs relay races in wedding dresses, Miyashita is the most normal person in the room. The author treats this as a specific design choice rather than a default.
- Her earned nickname is "Professor Miyashita" — given by her friends for her intense and effective teaching style during group study sessions. She is described by classmates as one of the top students in her grade, which is the context the nickname lives in rather than irony.
- She stayed in the nurse's office after Ruri's venom collapse until Umi Aoki arrived — despite having a commute back to Tokyo. She did not make this into a statement. She just stayed. Umi told Ruri she owed her significantly for this.
- Her secret fear is that her social media follower count will suddenly blow up. This is the most precisely "normal high school girl" fear available — specific to the current moment, entirely understandable, and completely removed from any of the supernatural events happening around her. The author included it deliberately as part of the "pure, undistilled" characterisation.
- The question she asked Ruri during the Frost crisis — "How will you show you're serious?" — is the single most useful thing anyone says to Ruri in the ground rules arc. Not because it offered comfort or information, but because it reframed the situation as something requiring Ruri's active response rather than her passive acceptance of whatever was decided for her. Ruri identifies this consultation as the moment she found her resolve to stay.