A young woman with a large shield, and according to herself, the “true” Defender type. Her powers, despite her frame, are formidable, and she has managed to help her Master climb to this spot in the official Duel-Chart. Although her attack-power is not the greatest, she sports the ultimate defense Noble Phantasm that has never been broken. Prefers to leave her opponents alive, but will not hesitate to kill if something threatens her Master.
They say that once in the past, when she was summoned, she was very different from her current personality, almost akin to an abandoned puppy. However, Defender herself is a testimony to how hardships faced together can change a person, even a Servant. Defender continues to stand by her Master's side, unwavering and always loyal. However, there might be bit more to that loyalty, as it is common knowledge Defender prepares the lunches Asakami Kazuya brings to school with him.
Players have yet to find out about them.
Unknown, as of now.
Has yet to affect lives of players.