One Eye is a wolf. He is one of the three wolves that Varamyr can enter into as a skinchanger. He is the biggest of Varamyr's wolves and has grey brown fur. He has a grizzled white muzzle and is blind in one eye.
A Dance with Dragons
One Eye, Stalker and Sly chase down a group of wildlings and kill them, using them as food. When Varamyr dies, he enters one last time into One Eye. One Eye and the pack encounter Summer while eating the remains of some dead members of the Night's Watch. Summer makes One Eye submit and the pack becomes his.