Penny is the grandmother of The Charmed Ones and a powerful witch in her own right. She raised the girls after their mother's death and bound their powers to protect them. When she died their powers were reborn. Like her daughter Patty she makes earthly visits to her granddaughters.
Sam is a white-lighter who fell in love with his charge, Patty Halliwell. They had a daughter, Paige before Patty died. He was lost and messed up before his grown daughter found him and helped him straighten out.
The future Chris Wyatt. He came from the future to try and change the destiny of his older brother Wyatt. He is half witch and half white-lighter. He had the unusual experience of dying and than being born on the same day.
Phoebe is the third born child of Patty Halliwell & Victor Bennett. She was a wild child at the beginning of the series but gradually grew up and learned to handle the great power she had been given. She is married to Coop and they have three daughters.
Dex was an artist who was married briefly to Phoebe Halliwell. They married impulsively after Phoebe had a false premonition that he was her future husband. After figuring out the truth they were annulled and he moved away.
Paige is the fourth Charmed One to be born to Patty Halliwell. Her father is white-lighter Sam Wilder. She was adopted after her mothers death but was guided back to her sisters after the death of Pru to bring back the power of three. She is married to Henry Mitchell and they have three children.
Christy is the daughter of two mortals Helen and Carl Jenkins who along with her sister Billy gained their magical powers as witches later in life. She was kidnapped by demons as a young child and despite her sisters attempts died as an evil doer.
Zankou is an ancient and extremely powerful demon. He holds the ability to read people's deepest consciousness. He has plagued the earth and the underworld and had both good and bad elements try to eliminate him.
She was a determined investigator who wanted desperately to discover the sisters secret. Despite many magical attempts to stop her she would not stop. This lead to her demise when she happened upon Zankou and was promptly killed.