Ember and Umber

Ember and Umber, also known as the Great Rams, are the dual ram gods of Fillory, somewhat analogous to Aslan in their role. Each is significantly larger than a normal ram, with large, curled horns. Ember is golden, and has a resonant baritone voice, whereas Umber is dark grey, also known as the Shadow Ram, and has a higher, tenor voice.

In the "Fillory and Further" books, they generally gave the Chatwin children a quest at the beginning, and then returned at the end to send them home again. In The Magicians, Ember has been trapped by the Beast, and Umber is presumed dead. It later emerges that the Beast was created when Martin Chatwin gave his humanity to Umber, who wanted to be a King as well as a god.