Sou Hazuki 
Moon Blossom Asura: The Ruthless Reincarnated Mercenary Forms the Ultimate Army Volume 3 [EPUB ebook] 

Once a great hero, but now a herald of destruction, Jeanne has become the new empress of the Holy Liyolure Empire as part of her crusade to annihilate all of humanity in the name of its salvation. Open war ensues, and the heroes have collectively deemed her a threat on the level of a Demon Lord, prompting Asura and the mercenary group Moon Blossom to join the fray. Though the battlefield teems with death and despair, Asura alone finds beauty in the madness. Will she and the other heroes be able to stop Jeanne’s rampage? And if Asura does, won’t that make Asura into a hero?