[Saya](https://anilist.co/character/836/Otonashi-Saya)'s twin sister and the story's main antagonist.

She provides the Delta67 (derived from her blood) which is used to transform people into Chiropterans. When she was born she was kept in an isolated tower as part of an experiment. Because of that she hated Joel, such that when Saya freed her she slaughtered him and the people at his birthday party. Her isolation left her childish and socially inept as well as ignorant of the moral ramifications of her actions.

~!She rapes [Riku](https://anilist.co/character/837/Miyagusuku-Riku) and kills him. As a result of her attack on Riku, Diva becomes pregnant. She does not give birth for over a year, when [Amshel](https://anilist.co/character/866/Goldsmith-Amshel) cuts the cocoons out of her body.   The fight ends as Diva and Saya pierce one another with their swords, which each had coated with their own blood. Saya is unharmed by the attack due to Diva's blood having lost its power when she became pregnant. Diva begins to crystallize from the effects of Saya's blood. Her babies emerge from their cocoons and Diva reaches for them, imagining herself with her daughters and smiling at the vision before dying. It is implied that Diva had long been seeking the unconditional love of a family, similar to Saya's.!~

Saya Otonashi, a seemingly normal high school student, suffers from amnesia and she can't remember the past year of her life. One day, after a man appears and gives her a katana sword, her destiny begins to be revealed. 
 
Soon she finds herself fighting the latest threat to humanity - Chiropteran monsters, ravenous immortal creatures that can change their form, disguising themselves as human beings. They feed off blood and hide themselves within the human world. An organization known as the Red Shield has been waging a private war to wipe them out and now the struggle has grown. Saya's journey for the truth has begun. 
 
(Source: Sony Pictures Home Entertainment)

__Skills & Abilities:__ Certified nanny

__[Profile (Air Agency)](https://www.air-agency.co.jp/talent/woman_allianc/akiko_yajima) | [Wiki (en)](https://en.wikipedia.org/wiki/Akiko_Yajima) | [Wiki (jp)](https://ja.wikipedia.org/wiki/矢島晶子)__

Akiko Yajima is a Japanese voice actress. Her best-known role is as the title character Shinnosuke Nohara in the long-running anime series Crayon Shin-chan. On June 29, 2018, Akiko Yajima retired from her role as Shinnosuke Nohara's voice actress, with the role succeeded by [Yumiko Kobayashi](https://anilist.co/staff/95539).

Non-anime roles:~!
• Alicia in "Valkyrie Profile 2: Silmeria" (VG)
• Anakin Skywalker in "Star Wars: Episode I - The Phantom Menace"
• Annie Bars in "Tales of Rebirth" (VG)
• Ben Seaver (early childhood) in "Growing Pains" (live-action TV series)
• Charlie Brown in "Peanuts" (animated series and specials)
• Chobi in "Final Fantasy: Unlimited After 2" (drama CD)
• Chobi in "Final Fantasy: Unlimited Before" (drama CD)
• Gaspard in ".hack//G.U. Vol. 2: Kimi Omou Koe" (VG)
• Gaspard in ".hack//G.U. Vol. 3: Aruku you na Hayasa de" (VG)
• Gaspard in ".hack//G.U. Vol.1 Saitan" (VG)
• Matsuoka Kyouko in "Kirai ni Narisou" (Drama CD)
• Maya Amano in "Persona 2: Batsu" (VG)
• Niigi Gorgeous Blue in "Castle Shikigami 2" (VG)
• Spyro in "Spyro the Dragon" (VG)
• Teddy in "Full House" (live-action TV series)!~

__Hometown:__ Hoisington, Kansas (born); Los Angeles, California (resides)

**[Twitter](https://twitter.com/KariWahlgren) | [Instagram](https://www.instagram.com/kariwahlgren/) | [TikTok](https://www.tiktok.com/@realkariwahlgren)**


Melissa de Carvalho Garcia is a Brazilian actress and voice actress who has already given his voice to several characters known, and who also directed the dubbing of series for Disney and Nickelodeon.    Height: 1,58 m

Saya, the main character, lost her memory and has been living with her adopted family. Her everyday life seems quite normal, except that she eats a lot more than she actually needs. Then one day she meets a guy named Hagi in a park. She is told that he has been searching for her, for a long time. Since then, her normal life has changed completely. (This manga series is proceeding quite a bit differently from the anime) 
A high school girl named Saya can not remember anything from her past. A handsome young man, Hagi, appears and something seems familiar about him. This girl is more than human with an ancient and mysterious past. She will hunt down and kill the monsters called Chiropterans.

A story focused on Saya and Hagi's past in Russia in the first years of the 20th century (1910's).


It is the official novel adaptation of the anime series. It expands on the events of the anime and gives greater background information on the battle against chiropterans.