Cassia Halliwell-Winchester

Cassia Halliwell-Winchester is the third and final child of Dean Winchester and Piper Halliwell. She is referred to as Nyx by a small group of demons called the Umbra who worship her and Ben Turner as their Gods, this is due to the fact that her father was in possession of the Mark of Cain at the time of her conception.

The first power Cassia demonstrated was Advanced Telekinesis in The Hunter and The Wiccan episode, The First Sign of Darkness, while still in the womb. The second was Electrokinesis in The Hunter and The Wiccan episode, Darkness Lurking, in order to break into Magnus’ lair. Her third and final power is Telepathy which she gains when she’s eight.

Cassia attends Magic School which is on an unknown plane of existence. She also helps her mother at the nightclub, P3.