Abigail appears to be tall for a woman, perhaps 5'11', with a long, oval face, a lot of curly chestnut colored hair, and a slender build. She also appears to be older, perhaps in her mid-forties.
Her werewolf form is relatively short for a werewolf, looking to be less than seven feet tall. She has a mass of curly chestnut hair on her head, even as a werewolf.
Her demeanor appears to be laconic and even-tempered. She handles Tom's outburst with aplomb. She'd rather go back to Ohio and mend their relationship with their old pack, then stake their claim there, presumably to become a new pack.
She and the rest of the Yardley Pack came over from Ohio, helping Thomas in his effort to claim Crescent Lake.