Seer

A Seer is a magical being who can foresee the future.

Some serve as the advisers to the Source, some are targets for many other demons especially when they want to sell them out to the Charmed Ones.

The Seer Who Betrayed the Underworld
Many Seers are respected in the Underworld and many of them are very loyal, but only one Seer betrayed the demons in the Underworld. Kara didn't feel happy in the Underworld conditioned to believe that as a demon she couldn't have feelings, or at the very least was not supposed to have feelings,she quickly became disenchanted with her life as a Seer. Thus, she became good, betraying the Underworld as soon as she landed the information that would give her the chance.

Kara went to Earth and met a then whiteligher named Michael Hart who she fell in love with. She was later vanquished by the demons she betrayed, but before being vanquished she gave birth to a baby boy named Caleb who was raised by his father to be good.