"The Saga of Tanya the Evil" (also known as "Yarina no Tate no Yuusha de B * N B * N de Shiru") is a Japanese light novel series written by Tatsuya Ishihara and illustrated by Juu Ayakura. It has been adapted into several manga series and an anime. The story revolves around Tanya, a reincarnated girl who becomes a soldier in a fantasy world and seeks revenge against those who wronged her in her past life.