Normal Look

Marsha's spent the last few years living out on her own in the wild, and it shows. Her hair is a matted mess, tied into pony tails at odd angles. She usually wears a sturdy shirt of some kind of thick hide, (probably bear?). The shirt is slightly oversized on her so she can fit in to it when she transforms, and she usually leaves her arms bare for similar reasons.

She's festooned with a hodgepodge of bones, baubles, and oddities on her clothes. It's hard to tell if any given one is a makeshift repair, survival tool, religious icon, or just a bit of something functioning as jewlery.

She usually doesn't carry a lot of weapons - just a knife and slingshot for hunting.

Transformed
Hair becomes between human spikey hair and a mane*. She grows large boarlike tusks*
and huge trampling hooves that hit like hammers. Her nose extends out, becoming more like a snout. Her eyes become red and her voice gets significantly lower and angrier and less human.

* - Yes, I know female boars don't have these traits. It's a magical curse.