John is a British blond man about forty years old, even if the demonic blood in his veins delays his aging. Well-versed in occultism and the dark arts, has a vast knowledge of magic and can apply various curses to whoever he wants. Cynical, foul-mouthed and sarcastic, chain-smokes Silk Cut cigarettes, consuming thirty a day. He has a very strong English accent. Anti-hero and morally gray, does whatever is more convenient to himself, even if he occasionally has his heroic moments.

He's not a bad man, per se, but he is quite irresponsible, and widely known as a lying bastard.