Clara Middleton is a fictional character from the novel "The Princess and the Goblin" written by George MacDonald. She is a young girl who embarks on an adventurous journey in a magical world filled with goblins and other fantastical creatures. Clara is known for her bravery and curiosity, which help her navigate the challenges she faces. In the story, Clara is aided by her magical grandmother, who provides her with a special thread that leads her to safety. The character of Clara represents themes of courage, friendship, and the importance of believing in oneself, making her a relatable figure for readers of all ages.