Isaac (Castlevania)

Isaac Laforeze (never mentioned by his entire name) is a major villain in the Castlevania game Curse of Darkness. He is a Devil Forgemaster who pledged loyalty to Count Dracula and becomes hellbent to avenge his fall, for which he blames his former comrade Hector. He resolves to make Hector retrieve the power he relinquished to fight him to the death, but it is eventually revealed that he lost every bit of sanity he had left due to Dracula's Curse and that he was but a pawn in Death's schemes.