Living together due to various circumstances. She's trying to attain enlightenment regarding sex. She has no sense of shame. She has an incredibly broad range of fetishes and draws a wide variety of situations. She draws erotic manga. Speaks with a regional drawl (Kansai dialect). Aoi's older sister. First person: I (Uchi). Calls everyone by their name without honorifics. She has Yukari show her various things.

Living together due to various circumstances. She's the most sensible one, but she's starting to become a bit like Akane... She's had extensive sexual knowledge since she was young because of Akane. She has endured Akane's sexual harassment for a long time. Speaks in standard dialect. First person: I (Watashi). Calls Akane "Sis" and uses "-san" for others.

Living together due to various circumstances. She tries to act mature, but she has a fair amount of sexual knowledge. Surprisingly airheaded, she tends to dive into things. She's gradually being corrupted by Akane. Often gets jerked around by Akane's whims. Flat-chested. First person: I (Watashi). Calls everyone with "-chan" or "-kun".