Hello Cassie and welcome to our family.
Willow is a beautiful grey, love those dark eyes and she is settling into her new home very nicely.
Its unusual for them to be plucking at this young age so an avian vet visit is in order, they should have a vet check them over anyways when you bring a new one into the flock but since she is pulling out feathers that means that something is bothering her and mites are a possibility so schedule one for as soon as you can get one so you can nip this in the bud before it becomes a habit.
Sometimes their skin is dry and if so it becomes itchy, get some aloe vera juice and spray her with it undiluted, be sure to soak her good with it, under the wings and especially where she is plucking, it soothes the skin and it won't hurt her if she ingests any of it, you can get it at any Walmart.