|Fenrir - courtesy of wikipedia
Meet Fenrir, the giant wolf-like creature, and Loki's son. And he is one of the fantastic supporting characters in A Girl's Guide to Time Travel.
In my story, Fenrir doesn't attack any horses. Thank you, thank you. Don't worry though, I have other creatures doing the attacking. Fenrir provides more of a calming influence in the story, as he's near Holland when she's experiencing frustration or anger. It's usually all Loki's fault.
Fenrir is a stable force, always willing to step forward, when necessary, or provide silent encouragement, when needed.