Alice Walkure - Alice the Demon Sacred Armor

Alice, a war maiden "Valkyrie" who invades Helmód Castle in Helheim's imperial capital on a mission from the Vanaheimr organization, finds out that the evil wizard Lokisol, tries to revive an ancient magical civilization and with it rule the world.

From Visual Novel Game : Taima Seikou Alice (対魔聖甲アリス)