She is a pure warrior with heavy armor and a battleaxe. Her wounds will heal naturally. So to Oblivion with restoration magic.

Anyway, the reason why I'm doubting is because of her personality.
For one, she is a Skald with a love for art and poetry, while the Companions are having dinner at the table bragging about their honour. Hrafna would spend her time alone writing poetry and playing the flute. Aside from Kodlak, Ria and possibly Farkas (He won't care about literature but he does seem kind-hearted.) I don't really know if Hrafna would get along with the rest.
Spoiler
Anyway, ever had a pure warrior that did not join the Companions? Besides, after I cure lycanthrophy guards will still mention the fur in her ears and the counter will continue, I dislike that.