Caster-class Servant first seen in Fate/Apocrypha as the Caster of Black. A magus and philosopher, founder of the Kabbalah and creator of the school of magecraft that Aozaki Touko uses. His NP is Golem Keter Malkuth.
Caster wears a featureless mask without openings for eyes or a mouth, a full-bodysuit, and a blue_capelet. Due to the mask he wore, it was impossible to tell whether he was afraid or even felt any emotion at all.
True Name: Solomon ibn Gabirol
Character Design: Konoe Ototsugu
Voice Actor: Miyamoto Mitsuru