Eustache is a man out of his time.

Born in the 1920s, Eustache was cursed to become a serpentine monster and was trapped inside the Castle. Alone, ever hungry, and slowly going mad, Eustache is a bundle of nerves waiting to violently explode - a danger to himself and everyone he meets.

Eustache is somewhere in his twenties. He's weedy, thin, perhaps a bit high-pitched or nasal. He's vulnerable, and not someone you would automatically consider a threat, not until you hear him talk and see how neurotic he has become.