Madan no Ou to Vanadis

Set in Western Europe during times of war Eleanor Ellen Vertalia one of the Vanadis of Zhcted leads the battle into Brune There are in fact seven Vanadis named for having each received a powerful weapon from the dragon to individually reign over seven territories The power of the Vanadis invokes dread and fear from their enemies An earl in the service of the country of Brune a young archer by the name of Tigre experienced the Vandiss power firsthand after being defeated on the battlefield by Ellen However Ellen chose to spare his life after witnessing his skills but in exchange he is asked to serve her
Source jCafe24