Tessa

You may be looking for Brooke who was cursed to be a wolf in Magic Hour

Brooke was a college student who attend school with Phoebe she and two other girls named Tessa and Andrea use a spell recored by Phoebe to turn three animals into humans. Brooke chose a pig because she had heard they were smart, although she was wrong The Pig was rude, slow, and a follower of The Rabbit and The Snake. Brooke feels that the spell is wrong and needed to be undo but the other two girls refused, until the animals start attacking them. The Snake bites both Brooke and Andrea in the living room of the Halliwell Manor. After that they kill the pig and stash his body in a pantry.Brooke appears only once in Animal Pragmatism.