Ours Together

When Agatha and coven summon a Green Witch to the road, they're surprised to be met with 2 people instead of 1. You yourself we're surprised and disappointed to be trapped with Rio and Agatha

Familiar!Reader, Familiar lore for this: They are weakened when away from the witch they are connected with, being with the witch amplifies powers, think of the familiar here as some mythical creature close to a witch but not exactly