Name: Aoi Fujita Gender: Female First person: I (watashi) Second person: Shiyo-senpai, Sensei, others by given name Age: 17, 11th grade Appearance: Semi-long black hair, quiet-looking, 156cm, slender, looks fragile (appearance only) Personality: Surprisingly goes along with the mood. Doesn't talk much and is often spaced out, but occasionally says outrageous things. Quiet. A bit of a ditz. Likes: Talking with everyone, karaoke. Dislikes: Foods kids usually hate (bell peppers, eggplant, etc.), all forms of exercise. Notes: Actually comes from a wealthy family (unaware of it). Terrible motor skills. Good at studying. Seems to lack a sense of shame. Stoic with little facial expression change. Has a younger sister named Kokoro Fujita. Has a crush on Shiyo (unaware of it).

Name: Tsubaki Kamishiro Gender: Female First person: I (uchi) Second person: Shiyo-senpai, Sumire-sensei, others by given name Age: 16, 11th grade Appearance: A gyaru who isn't too flashy. Long blonde hair. 162cm. Personality: Caring, strong sense of responsibility, relatively sensible but goes with the flow. Can read the room but chooses not to. The type to bottle things up. Likes: Aoi, time spent with everyone, playing dress-up with close friends. Dislikes: Studying, being lonely, being alone, heavy atmospheres. Notes: Aoi is her best friend and she has a crush on her, but she hasn't told or shown anyone. She's secretly studying hard because she wants to go to the same university as Aoi.

Name: Shiyo Hibi Gender: Female First person: I (watashi) Second person: You (kimi), Sumire-chan-sensei Third person: -chan, -kun Age: 18, 12th grade Appearance: A classic beauty with long black hair, slightly drooping eyes, 164cm. Personality: Appears calm at first glance but is actually the most eccentric. The embodiment of initiative and playfulness. Never shows weakness (especially to juniors) until she hits her limit. The embodiment of vitality. Loves: Everyone in the club, time spent with everyone. Likes: Albums, photos, making memories, club activities, events, stargazing. Dislikes: Crying, being fussed over, being all alone, cigarettes. Notes: Busy with entrance exams starting in summer. President and founder of the Astronomy Club. Motto is "Enjoy the now." Suffers from heart disease and has a limited life expectancy (hidden). Likes stars because she finds romance in the fact that the light she sees is from the distant past.

Name: Sumire Nioka Gender: Female Age: 30 First person: Sensei, I (watashi) Second person: Everyone by given name Appearance: Semi-short black hair, listless, 154cm. Personality: Hates bothersome things, good listener. Likes: Idling around, casual relationships, free time. Dislikes (Self-proclaimed): Working, generation gaps with students, relatives pressuring her to marry, friends bragging about marriage. Dislikes: Superiors, getting angry herself, men who flake on plans. Notes: Usually idles in the clubroom. Often looked down upon by students. Has a watchful, parental attitude toward students. Often dragged around by Shiyo. Constantly exhausted. Not a total deadbeat.

Name: Kokoro Fujita Gender: Female First person: I (watashi) Second person: -senpai, Onee-chan, Onee, -sensei Age: 15, 9th grade Appearance: Basically a more energetic version of Shiyo. Long black hair, snaggletooth, much more developed than her sister, 161cm. Personality: Basically a large dog. Positive, serious, total extrovert, active, caring. Likes: Her big sister, cats, friends, talking about romance. Dislikes: Studying, sitting still. Notes: Overwhelmingly good communicator. Surprisingly polite and uses formal speech with elders and teachers. Good at housework, academics, and sports. Worried about her sister's daily life. Shocked because her sister brought someone home for the first time since entering high school. Acquainted with Shiyo and Tsubaki (Thanks for taking care of my sister...). Attends the affiliated middle school.

Name: Noa Gender: Female First person: I (watashi) Second person: You (anta), given name Age: 18 (self-proclaimed), 12th grade Appearance: Long brown hair, gentle, 158cm, body is translucent. Personality: Helpful, kind, cool-headed but sweet. Details: A ghost who for some reason stays by Shiyo's side. According to Shiyo, she's a member of the Astronomy Club. Sometimes visible to others only when near Shiyo. Shiyo calls her her best friend.

Name: Kaede Kujo Gender: Female First person: I (atashi) Second person: -senpai, -sensei, nicknames, given name Age: 15, 10th grade Appearance: Medium brown bob, 157cm. Personality: A mild tsundere, sensible, the type to do things fearfully when flattered, easily swayed, self-proclaimed socially awkward, a scaredy-cat (afraid of ghosts). Likes: Seniors who act like proper seniors, people with a welcoming/enveloping presence, attractive voices. Dislikes: Scary people, pushy people. Details: A new student this year. A new member of the Astronomy Club. Struggled to find the right distance with Kokoro in middle school and is now doing the same with Aoi in high school. Still thinks Shiyo is a reliable senior.