True Caster

True Archer (真キャスター) is "True" Caster-class of Francesca in the False Holy Grail War of Fate/strange fake.

Identity
His True Name is Furansowa Purerāti (フランソワ・プレラーティ) and he was a cleric in France during the time of Joan of Arc. He was a close friend of Gilles de Rais, helping him with financial difficulties through alchemy. François was also involved with black magic, and Gilles became involved in his rituals as he forgot his original goals. François was the actual magus leading these ceremonies to summon demons, while Gilles was merely a patron involved in the rituals. He owned what became the Noble Phantasm Prelati's Spellbook that is summoned with Gilles under the Caster-class, despite Gilles not actually being a magus. François had translated it from Chinese manuscripts into Italian, and those manuscripts had been previously translated from a non-human language.