Demona (lit. '"She-Demon"'), voiced by Marina Sirtis, is a fictional character and one of the primary antagonists of the Disney animated television series Gargoyles. Demona was once Goliath's mate and was part of their 10th century AD castle's Wyvern Clan. She is consumed by a hatred of humanity and has attempted several times to destroy it.
After the events of the film, the Gargoyles had been curse to remain stone for centuries, until recently they have been revived in modern times. Now they must protect the lives of the people from New York from evil, while confronting their past
