Master of Caster (Fate/Prototype: Fragments)

The unnamed Master of Caster is the Master of Caster in the First Holy Grail War of Fate/Prototype: Fragments of Blue and Silver. He is the current head of the Reiroukan family (玲瓏館の当主) and Misaya Reiroukan's father.

Fate/Prototype: Fragments of Blue and Silver
The Master of Caster is betrayed by Caster during the course of the war and killed.

Abilities
The Master of Caster utilizes Rune Magic, Necromancy, and General Black Magic.