Thel is a fictional character created by the author William Blake in his poem titled "Thel's Motto." The poem explores themes of innocence, experience, and the nature of existence. Thel is depicted as a young girl who questions the world around her, seeking understanding of life and death. In the poem, Thel encounters various symbolic figures, including the Lamb and the Cloud, who represent different aspects of life. Through her interactions, she grapples with her fears and desires, ultimately reflecting on the complexities of human experience and the inevitability of change.