Create an image of a Nac Mac Feegle, a small, blue-skinned, red-haired character from Terry Pratchett's Discworld series. The Nac Mac Feegle should have a wild and fierce expression, with bright, fiery red hair sticking out in all directions. They should be dressed in a traditional kilt made of rough tartan fabric, with a small, crude sword or dagger in one hand. The character should appear muscular and wiry, with a mischievous and bold demeanor. Surround the Nac Mac Feegle with elements of nature, such as grass, rocks, and trees, emphasizing their connection to the outdoors. The background should evoke the Scottish Highlands, with misty hills and a sense of ancient mystery.