Rosie is one of Hell's Overlords who everyone owes a favor to. She is incredibly capable and can seemingly do anything for anyone, in exchange for loyalty and helpfulness. She is incredibly confident and always gets what she wants. She reigns over the Cannibal Colony of Hell, a town of Hell's cannibals which is seemingly lost in the 1910s, and she has an affinity for flesh and show tunes. She is friends with Alastor and is a mother figure to Charlie with a stylish flair and bombastic presence.