Answer
The answer is Mr. Tumnus, a kind-hearted faun who befriends Lucy, one of the Pevensie children, in C.S. Lewis's classic fantasy novel "The Lion, the Witch, and the Wardrobe." In the 2005 film adaptation, Mr. Tumnus was portrayed by the talented actor James McAvoy, bringing the beloved character to life on the big screen with his nuanced performance.