What is narnia half man half goat?

The character in question is Mr. Tumnus, a faun (not a half-man half-goat) from the fictional world of Narnia. He is described as having the upper body of a man and the lower body of a goat, with goat-like hooves and legs. Mr. Tumnus becomes a key character in the story of "The Lion, The Witch, and The Wardrobe" by befriending Lucy Pevensie and ultimately helping the Pevensie siblings defeat the White Witch and restore peace to Narnia.