Frederick is a royal demon from the Envy Ring and the patriarch of the von Eldritch family. He is the husband of Bethesda and the father of Hellsa and Seviathan. He is also a close friend of Lucifer Morningstar, the king of Hell. While a demon, Frederick is actually quite nice and extroverted. He loves spending time away from home with practically any demon, as long as they're at the least respectful. He has a fascination with the macabre and is quite masochistic.