Illyasviel von Einzbern

Illysviel, also called Illy, is a young Teutonic aristocrat who travels to Japan to participate in the fifth Holy Grail War as the Master of Berserker. She lives in a castle on the outskirts of Fuyuki City, accompanied only by her Servant and her two maids Leysritt and Sella. It is later revealed that She is not a human, but rather a homunculus, created to serve as the vessel of the Holy Grail. Her ultimate fate is not revealed in the Normal End, although she is presumed to have perished due to her homunculus' design a year after the War's conclusion.

Personality
Illyasviel is shown to be quite friendly as she asks those she feels comfortable around to simply call her "Illya".

Sorcery Skills
Illyasviel has an angelic appearance and an unsurpassed degree of magical power, seemingly able to control Berserker with ease. When wearing the Dress of Heaven and empowered by the deaths of at least six Servants, she is capable of performing a limited version of the Third Magic, Heaven's Feel, one of the Five types of True Magic which can accomplish impossibilities beyond modern science or sorcery.