The Witch of November comes stealin'
  -Gordon Lightfoot

Appearance
Gwynneth Chyddrigg
Full Name: Y Ddraigg Wyn Tundrata
5'9", 140lbs.
30-year-old Human Female
  Gwynneth is a shapeshifter, so each of the above is subject to change. As long as she is in a humanoid form, though, she is unlikely to change either her face or her white hair. Maybe the eyes.

Character
  Gwynneth is fond of animals. Particularly, arctic animals, with white hair (or fur, pelt, feathers, scales, etc.). She is also fond of demi-humans with animal features, and will frequently shift into such a shape to suit her own fancies.