Souichirou Kuzuki

Souichirou Kuzuki  is an anti-villain from Fate/stay night who is the strict homeroom teacher of Rin Tohsaka's class. He primarily lectures on World History, though he also holds classes on Ethics. While Kuzuki is well respected among staff and students, he is widely regarded as austere and impersonal. He acts as the Master of  Caster  during the fifth Holy Grail War, although he seems to act more like a Servant to her.

He is voiced by Kazuhiro Nakata in the Japanese version of the anime and Patrick Seitz in the English version. In the English version of the Fate/Stay Night: Unlimited Blade Works anime, he is voiced by Lex Lang.