Maddy is an enchantress with incredible power, who went by many names over hundreds of years. Her more famous guises were probably as the goddess Medea, and the dark witch, Sycorax.
Preferring the current form of a black cat with a devil tail, Maddy is a member of the 13th Floor. Most recently, she volunteered to spy on Mr. Dark who, even with all his power, could not detect her presence.
- Maddy and Prospero have a history with each other, back when she was known as Sycorax. It's unknown if he's aware of her new identity, though the Pre-Amnesty agreement would make it illegal for either of them to act on old grudges.