When Leah assumes the form of her Bjornaer heartbeast, she grows to about six feet in length (a little over 3 feet at the shoulder) and weighs close to 20 stone. Her fur is orange-brown in color and her eyes are an amber color. Her nose is pink and muzzle white.

This particular lioness has all the intelligence of the maga, and her facial expressions often are an unnatural reminder of such. Additionally, Leah often calls upon the Voice of the Bjornaer Maga allowing her to speak while transformed into a lioness.