Jubstacheit von Einzbern
An elderly man with snowy white hair and piercing blue eyes. His face is wrinkled and creased with the signs of age and he has a respectably long white beard. Despite his obvious age, he stands upright and is built strongly, and he shows no signs of senility or mental weakness.
The current head of the Einzbern family, also known as Acht. He seems to be the one who dispatched Erisviel to Einzbern Castle outside of Fuyuki City, with instructions to recruit Masters for the Einzbern cause during the latest Holy Grail War. He seems to value victory in the Holy Grail War for the Einzberns and opening the gate to the Swirl of the Root above all else.