Sara is a young girl with witch powers she grew up on an island with her mother and grandmother and was brought to Avalon from her island home with her grandmother. The grandmother died while she was there and now she lives at the school full time. Her witch familiar is a Soul Bound Doll of a Teddy Bear, named Cariban. One of Its button eyes is replaced with a slightly bigger button with a black tree in a circle, that she got from a box of things her mother gave her before she passed away.
The bear was already her familiar before the doll and now two spirits reside in it. The spirit of the familiar has been passed down through all of Sara's family line and knows every spell on the witch list and is Sara's witch mentor.