Akari Mamiya is the protagonist of the yuri series "Hidan No Aria AA". She is a clumsy and carefree first-year student at Tokyo Butei High School .
- She idolizes the legendary Assault S-Rank Aria H. Kanzaki, and she have a poster of her on her wall next to her bed rubbing her face at it after she had a dream about her.
- She never forgets her gun because it resembles Aria's.
- Despite how large the odds are stacked against her, Akari is persistent to become Aria's "Amica", an underclassman who receives training from an upperclassman.and later she questions whether or not she can be of any use to Aria.
- Akari risks herself to protect Aria from an oncoming car at episode 1.
- At the ending, she was blushing upon seeing Aria and holds hands with her.