Mina Hibino

* Middle schooler
* Adult

**Mina Hibino** (日比野 ミナ, *Hibino Mina*) is one of Takagi's and Nishikata's classmates and a good friend of Sanae and Yukari.

## Appearance

Mina has long brown hair, which she usually keeps tied back into a ponytail, and very short bangs. Most notably, she has thick eyebrows and large brown eyes. She is noticeably shorter than most of her classmates, making her appear much younger than she actually is.

As an adult in the spin-off manga, she has grown taller but still remains comparatively short. She is still the shortest among her classmates. Her hair is longer and she ties it in a braid. When at the kindergarten, where she teaches, she wears a sweater and apron. In general, she wears a simple top and pants.

## Personality

Mina is a kind, energetic, bubbly girl and is usually cheerful and optimistic around others. She is especially playful and noisy around her two closest friends, Sanae and Yukari. She can be a bit silly and her enthusiasm and loudness can annoy her friends but they find it endearing too. She is pretty good at cooking according to herself. She loves cats and would do anything in order to pet them as per Ashita wa Doyōbi 14. Unlike Yukari, she is not studious. While she can often be hard on herself sometimes, she usually snaps out of it, as she hates being in a somber mood. She's the type who needs lots of sleep but she also wakes up very early to help with various chores like helping out with making food for the family. She tries to act mature by doing stuff like drinking coffee and wants to be perceived as such but she always fails in her mission as she is actually very childish.

As an adult, she is still sweet and cheerful. However, being a mother of three and a teacher has made her more responsible and strict, though, Sanae and Yukari think of her as someone who is way too easygoing.

## Relationships

### Yukari Tenkawa

*Main article: Yukari Tenkawa*

Yukari is one of Mina's best friends. They hang out together all the time both in and out of school along with Sanae. Outside school, they often meet up at each other's houses. They even go to other places like the beach and the summer festival together. Even though Yukari really loves Mina, she often gets annoyed with Mina's antics and when Mina and Sanae team up to tease her. Yukari always reprimands Sanae for pinching Mina's cheeks. Mina does not like to study and hence often slacks off in her studies and even forgets to do her homework, this very much irritates Yukari and she always scolds Mina for slacking off but it doesn't help. Mina usually has to ask for Yukari's notes and help so that she can complete her homework which is another thing that irks Yukari. Mina does not share Yukari's passion about romance, another thing that annoys Yukari. Yukari says that she won't help but always ends up helping Mina. Of course, Mina loves her friend a lot and she does a lot of nice things for Yukari which the other girl really appreciates. When Mina is upset, Yukari always tries to cheer her up and Mina always does the same for her.

As adults, they are still close. Yukari is seen to sometimes visit Mina at the kindergarten where she teaches. Even as adults, they once tailed Takagi and her family together along with Sanae. Being one of Yukari's closest friends, Mina was there to calm her down when she was having pre-wedding blues. Of course, she attended Yukari's wedding her wedding.

### Sanae Tsukimoto

*Main article: Sanae Tsukimoto*

Sanae is one of Mina's best friends. They hang out together all the time both in and out of school along with Yukari. Outside school, they often meet up at each other's houses. They even go to other places like the beach and the summer festival together. Even though Sanae loves her friend, she often gets annoyed by Mina's overly optimistic and boisterous nature. Whenever Sanae gets annoyed with Mina, she pinches her cheeks very tightly, though she does not intend it to be something mean or hurtful. Sanae always ends up eating Mina's food like ice cream or the food from her bento but also makes up for it by giving her something else. Sanae seems like a very quiet and serious person but when she is with her friends, she is almost as chaotic and hyper as Mina. Mina and Sanae slack off in their studies and tease Yukari together which always gets on Yukari's nerves. Once when Takao was sort of insulting girls for their interest in writing letters and was directing the insults more toward Mina, Sanae got angry and kicked Takao for insulting her friend and girls in general. Yukari and Mina had managed to get Sanae to wear a Yukata for the summer festival and tie her hair in a ponytail. Sanae neither likes to dress up like that nor does she like tying her hair but the compliments from her friends made her happy and she decided to stay dressed that way for the sake of her friends. One time Mina gave her rubber band to Sanae because she and Yukari wanted to see Sanae with a ponytail. Sanae does not like tying her hair but she decided to keep it that way for some time because Mina thought she looked pretty.

As adults, they are still close and have not changed. Mina often annoys Sanae and her cheeks get pinched by Sanae as a result. Sanae still steals Mina's food.

### Takagi

*Main article: Takagi*

In middle school, they do not interact much but are on friendly terms. Mina tails Takagi and Nishikata along with Yukari and Sanae on Yukari's request.

They interact much more as adults since Mina is the kindergarten teacher of Takagi's daughter, Chi. They often chat when Takagi goes to pick up Chi from her kindergarten school. In Chpater 80.5 (Moto), they meet in the pool when they are on an outing with their families, the interaction shows that despite not being that close as middles schoolers, they know each other pretty well.

## Etymology

* Mina's surname **Hibino** means "sun, day" (日) (**hi**), "ratio, proportion" (比) (**hi**/**bi**) and "field, wilderness" (野) (**no**).

## Trivia

* Mina tries to drink coffee to seem more like an adult, but ultimately fails and had to trade drinks with Sanae instead.
* Mina enjoys orange soda as a beverage.
* Mina still believes in Santa Claus as a teenager.
* Mina needs at least 8 hours of sleep.
* In the Season 3 opening, Mina is seen with Yukari and Sanae while secretly tailing Takagi and Nishikata.
* Mina is one of the main characters in the spin-off manga, Ashita wa Doyōbi by Sōichirō Yamamoto's.
* In the manga, Karakai Jōzu no (Moto) Takagi-san Chapter 72, it is revealed that Mina is the teacher for Chi (Takagi and Nishikata's daughter) in kindergarten. The chapter also reveals that she already has three children, while the identity of her husband is still unknown.
* Mina's age in the spin-off is never revealed, but estimated to be around 26 - 27 year old.
	+ Her age being around 26 - 27 year old is due to the fact that she went to the same school and class with Takagi/Nishikata. In Chapter 31, Takagi mentioned *"it has been over 10 years since those days in middle school"* while reading through her middle school graduation album. Since the age students graduate from middle school in Japan is 14 - 15 year old, then add **over** 10 years to it. 14 to 15 plus more than 10 is around 26, at the least.

* Mina has a very sensitive tongue and can't handle the taste of carbonated drinks, even into her adulthood.
* Mina is the cousin of Hibino (who was never given a first name) from Fudatsuki no Kyoko-chan, another one of Sōichirō Yamamoto's works.
	+ This was seen in Episode 11/Season 2 of the anime and Ashita wa Doyōbi 21 when Mina sent photos of her with her cousins to Yukari and Sanae.
	+ Creator Sōichirō Yamamoto confirms this in his Tweet with a picture of the two cousins and the text "いとこの日々野さん２人," which roughly translates to "two Hibino-san cousins."