Ryuki Densyo: Dragoon

Deep within the Garubado Empire, a secret weapon of terrifying potential is in development — only to be stolen during combat and lost on the battlefield. The weapon is not a device or a piece of technology. It is a girl who can summon the power known as the Dragoon. When she is found, she has no memory of who she is or what she can do. A wandering swordsman-in-training named Cedy comes across her and, moved by her situation, takes it upon himself to uncover her true identity and the mystery behind her extraordinary ability.