Rin Mate

Full Name: Rin Mate

Gender: Female

Birthday: May 4 (Taurus)

Height: 159 cm

Blood Type: A

Affiliation: Seironsha (publishing company)

Occupation: Editor, article writer for the magazine “Walker”

First Proper Appearance (manga): Volume 4, Chapter 9 “A Daily Life Searching for ‘E’”

First Mention (manga): Volume 3, Chapter 3 “Little Sister Café – Homework Assistance Now Available”

Voice Actress (anime): Juri Kimura

Nickname from fans / Cocoa Hoto: “Rin-chan-san”

Her name “Rin Mate” is derived from the coffee bean variety “Mandheling”.

Rin works at Seironsha, a company that publishes magazines such as “Walker”.

She serves as the editor in charge of Midori Aoyama, acting as both her professional handler and long-time friend.

She is introduced as the person who constantly chases down Midori, whose wandering habits make deadlines a nightmare.

Finding Midori, scolding her, and dragging her back to work is basically Rin’s self‑appointed life’s work.

At first she mostly interacts only with Midori.

From Volume 6, Chapter 3 onward, she begins spending more time with Cocoa Hoto and the others, especially after joining them in a big “tag” game chasing Midori.

Although her appearances are scattered, she has gradually settled into the role of a reliable “adult” who guides the younger cast.

She also appears in the anime “Is the Order a Rabbit? BLOOM”, where her role is expanded slightly compared to the manga at that point.

Rin is diligent, serious, and highly responsible, but also expressive and easy to read emotionally.

She laughs, cries, and panics a lot; among characters who appear in at least three panels per chapter, the proportion of chapters where she cries is second only to Mocha Hoto.

She generally speaks politely to everyone, including Cocoa Hoto and her friends.

However, with Midori Aoyama she sometimes drops into casual speech, revealing their long and intimate history.

On the surface she is the exasperated adult who scolds Midori for skipping work.

Underneath, she clearly enjoys being dragged into Midori’s antics, willingly tagging along to casinos, trips, and even “punishment” chores like helping with hotel cleaning during Midori’s enforced time-out.

She describes herself as having bad timing, and this clumsy sense of timing is something she worries about.

Despite that, she is quick-thinking when it comes to work and surprisingly sharp when reading other people’s feelings.

Rin claims she can receive “telepathy” from others.

Cocoa Hoto suspects this is just a kind lie, but some of what she “receives” is actually accurate, and both Chino Kafu and Natsume Jinja also seem to pick up telepathic messages in certain scenes.

A more grounded interpretation is that Rin’s years of dealing with a childish, evasive author like Midori have trained her empathy and emotional insight.

Her “telepathy” is likely an exaggerated way of describing how well she can read people’s thoughts and moods.

She does have a playful side and a good sense of humor.

Rin is surprisingly open to cosplay and wild ideas, often being the one who suggests them.

Rin has strong blue‑green (teal) hair and golden eyes, giving her a striking, cool-toned appearance.

She looks slightly sharp and mature, matching her role as a working adult and editor.

Her figure is described indirectly rather than with explicit measurements.

In most depictions she appears slender but with noticeable curves, fitting the image of a neat, professional office worker.

Midori Aoyama

Rin is Midori Aoyama’s editor, former school junior, and long-time friend.

They have known each other at least since the high school literature club, where Midori was the senior and Rin the junior.

Rin usually calls her “Aoyama-sensei” in a formal, professional way.

However, when she is drunk or letting her guard down, she affectionately calls her “Midori-chan”, showing how close they really are.

Midori calls her “Rin-chan”, emphasizing their long relationship and Rin’s junior status.

Even now, Ren is frequently “dragged around” by Midori’s whims, both in work and in private life.

Despite constantly scolding Midori for slacking off and disappearing, Rin genuinely respects her.

Rin even credits her own growth and career path to her high school days with Midori, saying that their time together opened the way for her current life.

Cocoa Hoto and Friends

Cocoa Hoto calls her “Rin-chan-san”, a somewhat comical double honorific that fans have adopted as a nickname.

Rin normally maintains polite speech with Cocoa and the others, but she quickly becomes comfortable joining their activities.

She joins Cocoa’s group more actively from around Volume 6.

By the time of the travel arc in Volumes 8–9, she is often seen spending her days off with Midori and the younger cast.

She participates with them in events like tag games, casino escapades, and parties.

Over time, she becomes a dependable older-sister-like presence for the younger characters, someone they can look up to as a working adult.

School and Alumni Connections

Rin, like Midori, is a graduate of the prestigious girls’ school attended by Rize Tedeza and Syaro Kirima.

She was admitted as a special scholarship student, implying high academic or literary ability.

The school trusts her enough to invite her back as an alumna representative.

She appears at campus tours for prospective students and at New Year parties, where she hosts mini-game events.

During one such event, she gives a speech about how her high school life with Midori helped her grow and find her path.

Her words are moving enough to deeply impress Megumi Natsu.

Immediately after that serious, heartfelt moment, however, she projects a large photograph of Midori on the screen like a wanted poster.

She then tells the audience, “If you see this person, please let me know,” stunning both the Chino Kafu–Megumi Natsu–Maya Joga group and the prospective students who do not know Midori.

Rin is a capable editor at Seironsha, where she handles Midori’s novels and writes magazine articles, including for “Walker”.

She is already in a position to direct junior staff, showing that she is recognized as competent despite her relatively young age.

When she reads a short story written by Chiya Ujimatsu as a break from exam studying, she immediately spots both its strengths and its weak points.

This balanced critique shows that she has a keen editorial eye and can evaluate writing quickly and constructively.

Her emotional insight, sharpened by dealing with Midori for years, helps her understand authors and younger characters alike.

This is likely the basis of her “telepathy” claims and why she can guide “troubled youth” so effectively.

She is also good at adapting to situations and can be surprisingly bold with ideas.

For instance, she readily comes up with event concepts and promotional tactics for authors and their works.

Rin has an unexpected fondness for cosplay and themed events.

She eagerly suggests attending a signing event in costumes such as “Usa-Bari” or “Lapan” (heroic rabbit-themed outfits from in-universe works).

She even proposes a mascot-suit signing event and later attends her alma mater’s party in a “Lapan” costume.

Her enthusiasm for these events shows how much she enjoys the fictional works she handles, not just as an editor but as a fan.

Rin becomes visibly excited when she sees Syaro Kirima in her “Phantom Thief Lapan” outfit.

Her passion for works and characters is strong, and she can get carried away like a hardcore fan.

She does not like bitter coffee and usually finds it too harsh.

However, she can drink and even praise Chino Kafu’s special blend, describing it as delicious.

She also visits the traditional sweets shop Ama Usa An as a customer from time to time.

This suggests she enjoys sweets and cozy, relaxing places, fitting her somewhat soft-hearted personality.

Rin’s exact age is never stated.

However, the manga provides enough hints to estimate a reasonable age range.

She is younger than Midori, who was her high school senior in the literature club.

If we assume no repeating of grades, this places her roughly one to two years below Midori in age during their school days.

Rin’s rumor-filled school life reaches the ears of Yura Karede, who is one grade above Cocoa Hoto.

However, these are only heard as stories; Rin and Yura did not attend the school at the same time, suggesting a gap in year groups.

In Volume 11, Chapter 1, a flashback by Cocoa shows a time period when Chino Kafu is already born.

In one panel, Rin appears in the same frame as Midori but is not accompanying her, implying she is younger than 15 at that time.

Combining these hints, the following estimate is commonly accepted:

– Rin is approximately 4–13 years older than Cocoa Hoto.

– At her first major appearance (Volume 4, Chapter 9), Rin is likely around 20–30 years old.

– In the latest chapters (as of 2025), she would be around 22–31 years old.

These numbers are best understood as an approximate range rather than strict canon.

Within the story, she is positioned clearly as a young working adult, older than the main high-school cast but not middle-aged.

Rin’s bust size is never numerically specified.

However, fans have attempted to infer it based on visual cues and clothing scenes.

In Volume 9, Chapter 1, Rin borrows Syaro Kirima’s elite girls’ school uniform.

She does not complain about any pain, nor does she tear the clothes, which suggests her chest is not excessively large relative to Syaro’s.

On the other hand, several points imply she is not flat-chested either.

First, there is a small buildup suggesting concern over whether both Rin and Syaro will fit properly into the uniform, hinting at possible size differences.

Second, later information shows that the school uniform has high stretch.

For example, in a 2015 issue, it is shown that a uniform sized for 146 cm tall Maya Joga can still be worn by the 163 cm Midori Aoyama, indicating the fabric is very elastic.

Third, illustrations often show Rin with a clearly defined bust line, especially in a 2025 September cover image.

In that artwork, her chest is drawn as not much smaller than Chiya Ujimatsu’s, who is known to be well-endowed.

From these points, it is reasonable to interpret Rin as having a modest but definitely noticeable bust.

Her careful phrasing when wearing the borrowed uniform may have been deliberate, avoiding comments that might aggravate Syaro’s own complex about her small chest.

Among the extended cast of “Is the Order a Rabbit?”, Rin is considered by some fans to be somewhat underused.

She clearly has a distinct personality and role, but her spotlight episodes are few.

As of 2025, she has only two chapters where she is truly the central focus.

After the travel arc, her appearances become slightly more sporadic, partly due to the overall cast growing in size.

Even though she debuted at the same time, Yura Karede, whose promotion to “main character” was delayed compared to Rin, ends up with more panel time.

Rin, meanwhile, tends to show up in short scenes, offering advice or reacting to Midori, rather than driving the plot herself.

On the spine illustrations of the collected volumes, newer characters such as the “Brava” group and Yura Karede appear earlier than Rin.

As of Volume 13, she still has not appeared on a spine illustration, which some fans see as symbolic of her lower priority in merchandise and promotion.

Anime-wise, her full-fledged appearance arrives in “Is the Order a Rabbit? BLOOM” (Season 3).

Because she did not appear much in “Is the Order a Rabbit?? Season 2”, she missed the era when the series had its biggest wave of merchandise.

Even in “BLOOM”, although she receives some new key art, individual character goods featuring only her remain relatively rare.

For example, she only appears in one opening theme (“BLOOM”’s “Tenku Cafeteria”), and not in other main theme animations.

In the character introduction pages at the start of each manga volume, she appears from Volume 4 onward but initially without a name.

She is only explicitly named in Volumes 6, 9, 10, and 11, which is five out of thirteen volumes as of 2025.

Color illustrations of Rin by series creator Koi are much fewer than those of other characters.

Aside from her two cover/lead pages and a few color spreads, she appears notably less than the core main cast.

Even in annual collaborations, such as those with the Atre shopping complex, Koi has drawn new art for many characters since 2022.

However, Rin, as well as Midori, Mocha Hoto, and Yura Karede, have not yet received new character-specific illustrations in that context.

On official anime channels, her birthday is usually marked only with a scene still and a short message.

In contrast, for the main seven characters plus Midori and Mocha, her 2024 birthday brought dedicated birthday merchandise, and in 2025 there was a DJ mix release featuring character songs.

Rin did not receive equivalent special products or music-related projects for her birthday.

This reinforces the sense that, despite being beloved by a segment of the fanbase, she occupies a secondary tier in official attention.

That said, “Is the Order a Rabbit? BLOOM” quietly increased the number of scenes where she appears compared to the manga at the time.

Even after her relative decrease in panel time, she still pops up from time to time to offer guidance, advice, and adult perspective to the younger cast.

In this way she has carved out a niche as a grounding “adult” supporting character.

Her future presence in the series remains uncertain but hopeful, as there is clear room to expand her role and explore more of her life beyond chasing Midori.

At a school event, Rin humorously announces:

“Even now, my high school senior is still running me ragged! If you see this person, please tell me!”

This single line captures her entire relationship with Midori: exasperated, devoted, and oddly happy to be dragged along.

It also shows why many fans find Rin so charming despite her relatively small number of appearances.