Kit

Kit is the former familiar of the original Charmed Ones. She is an animal guide who protects neophyte witches

History
She once protected Serena Fredrick but became the familiar of the Charmed Ones after Serena was killed by the warlock Jeremy Burns, and the Halliwell sisters discovered their powers. She was their Familiar from 1998 to 2001, after which she was rewarded by being made human, taking the name Katrina.

In 2003, Katrina was hunted by a Familiar Hunter who wants to kill her so that the other familiars are helpless, leaving neophyte witches unguided. While traveling through the past due to a spell cast by Piper, he continued to try to murder Kit in feline form. Had he been successful, he would have erased much of the good the Charmed Ones had done. Each of his attempts to kill Kit was stopped by Phoebe and Paige who were also under the effect of the spell, and they eventually vanquished him. Katrina then properly reunited with the sisters, revealing who she was and asking them to call her when Piper's newborn baby, Wyatt, came into his powers.

Powers and Abilities
Active Powers
 * Sensing: The ability to sense other beings and locate them. Kit possessed the power to sense evil and could identify demons and other evil beings, as well as being able to see spirits and astral beings.
 * Agility: The ability to possess agility beyond humanly possible. In human form, Kit possessed enhanced agility as well as razor sharp nails.
 * Omnilingualism: The ability to communicate with animals. Kit's ability to communicate and understand other familiars whilst in her human form.