Lord Marksman and Vanadis

Madan no Ou to Vanadis Lord Marksman and Vanadis (魔弾の王と戦姫, Madan no Ō to Vanadīsu) is a Japanese light novel series by Tsukasa Kawaguchi. As of October 2014, 10 volumes have been published by Media Factory under their MF Bunko J label. A manga adaptation by Nobuhiko Yanai started serialization in Media Factory's seinen manga magazine Comic Flapper on October 5, 2011. It was one of five MF Bunko J light novel anime adaptations announced at Media Factory's Summer School Festival event on July 28, 2013. An anime television series by Satelight is scheduled to air from October 2014. The word Vanadis is lifted from Norse Mythology, a name for the psychopomp Freyja according to Snorri Sturlasson.

Plot
In times of war, set in Western Europe, Eleonora Viltaria, one of the seven Vanadis of Zhcted, leads the war into Brune. There are actually seven Vanadis, named like this because they each received a powerful weapon from the dragon, to reign over 7 territories, each possessing their own. The power of the Vanadis causes dread and fear toward their enemies. An Earl in the service of the country of Brune, a young archer called Tigre, got a taste of it after he was defeated on the battlefield by Ellen (Eleonora). However, Ellen decided to spare his life after seeing his skills. In exchange, he is asked to serve Ellen...

Official

 * https://ja.wikipedia.org/wiki/%E9%AD%94%E5%BC%BE%E3%81%AE%E7%8E%8B%E3%81%A8%E6%88%A6%E5%A7%AB