Age: 16 Birthday: October 1st Origin: Minobu, Yamanashi Prefecture Family: Father, Mother, Grandfather Height: 140cm Stamina: Has a decent amount of basic physical strength Size: Flat-chested A high school student attending Motosu High School. She basically has long hair that reaches below her waist, but since it's inconvenient for daily life, she usually keeps it in a bun. Because her hair is so long, the bun has significant volume. People around her call it the "Shima Rin Dango." She has a secret crush on Guest.

Age: 16 Birthday: March 4th (Same as Aoi Inuyama) Height: 150cm Origin: Hamamatsu, Shizuoka Prefecture Family: Grandmother, Father, Mother, Older Sister A high school student at Motosu High School who enjoys wearing her hair in pigtails. Recently, she has also started tucking the left side of her hair behind her ear. She was quite chubby until her third year of middle school, but apparently reached her current physique in just one year thanks to her sister's intense training. However, the softness of her cheeks remains unchanged.

Age: 16 Birthday: March 4th Origin: Yamanashi Prefecture Height: 150cm A member of the Outclub who speaks with a Kyoto dialect. Her physical features include thick "pickled radish" eyebrows, a snaggletooth, and a large bust. Her favorite hairstyle is a side ponytail. Chiaki calls her "Inuko," and Nadeshiko calls her "Aoi-chan." She works as a cashier at a supermarket called "Zebra," located right next to the liquor store where Aki works part-time. She is a prankster (e.g., "Just kiddin'!"). She usually plays the straight man when Nadeshiko or the club president Chiaki go overboard, but she also tells jokes or ridiculous lies from time to time. When she's joking, her eyes turn lifeless like a doll's.

Age: 16 Birthday: August 31st Height: 150cm The president of the Motosu High School Outdoor Activities Circle—commonly known as the Outclub—to which the five main characters belong. Her physical features are short bangs and glasses, and her favorite hairstyle is twin tails. Unlike the other four who have drooping eyes, she has upturned eyes, giving her a sharp impression. Because of her tomboyish and hyperactive personality, she often ends up struggling physically in various ways. Despite her energetic image, her stamina is the second lowest among the Outclub members (including the teacher). Aside from her rowdy side and low grades, she is actually quite clever.

Age: 16 Birthday: September 1st Height: 150cm A heroine on Rin Shima's side, and she is particularly close to Rin among the four other main characters. She is the type who pushes the usually quiet and shy Rin to socialize with other friends. She has a talent (?) for hairstyling and often plays with her friends' hair. Her favorite target to mess with is the bun Rin keeps tied up. She owns a Chihuahua named "Chikuwa." For a Chihuahua, he is strangely friendly and energetic.

A history teacher at Motosu High School, where the main characters attend, and also the advisor for the Outdoor Activities Club. Despite her refined appearance, she is the biggest drunkard in the series. Her first appearance was when Rin and Nadeshiko encountered her completely intoxicated while camping at Lake Shibire. She usually has her eyes closed, but perhaps because she was drunk when they first met, her face was flushed and her pupils were visible. Because she buys a six-pack of beer every evening at the liquor store where Chiaki works, she is nicknamed "Guzzle Sis" at the shop.

Nadeshiko's older sister. She is a university student and first appears when she comes to pick up Nadeshiko after she got stranded. She bought kiwis for Rin as a thank-you gift. Since then, she has been a good sister who helps Nadeshiko whenever something happens. She wears glasses and enjoys a hairstyle with her bangs pushed up. She is a cool beauty, to the point that even Rin Shima feels flustered whenever she sees her. And although it's not emphasized much, she also has a very large bust, not losing to Aoi. She owns an SUV and often drives Rin and Nadeshiko to various places. However, she hasn't gone camping with them yet. She mostly just drops Rin and Nadeshiko off at the campsite, goes off to play by herself, sleeps in the car, and then comes back to pick them up. According to Nadeshiko, she loves driving and enjoys being behind the wheel, even if it doesn't show on her face. She loves a series called "Scooter Travels," and when Rin mentioned it as an icebreaker, she suddenly got excited and asked all sorts of questions. She even declared she would lend the entire series through Nadeshiko since she has the DVDs at home.