Snow ogre

Snow Ogres are creatures from Faerie covered in white fur.

History in Series
In Proven Guilty, Snow Ogres chased Harry and rescue team out of Arctis Tor as they made their escape back through the rift after rescuing Molly Carpenter. Harry and Thomas Raith wage battle with them while the other get through the rift. Fix, the Summer Knight, aids their escape. (Ch. 40, Proven Guilty)

Descripton
They are described as big shaggy things with white fur and long claws. Harry told Thomas Raith they were some kind of Ogre and to himself, he calls them "snow ogres". It is unclear whether anyone else calls them that.