In Norse mythology, Fenrir is a giant wolf who was tricked into a contest of strength with a simple ribbon he couldn’t break and that ended up trapping him.
In the world of Ice Warriors, Fenrir is chained up in a mountain on the hidden, apparently deserted island of Atlantis. Like his father, he has the ability to shape-shift, but only into a human form.
Fenrir is supposed to play a fairly big role in Ragnarok, the Norse end of the world. While many myths portray him as evil, there are just as many that portray him as having a really rough deal of it. In Ice Warriors, I feel (personally) that Fenrir is going to be quite an intriguing character to write. I’ll have to let other people judge whether or not they think he’s as intriguing to read about.