The Knave of Hearts is a character from Lewis Carroll's poem "The Hunting of the Snark" and is often associated with the Queen of Hearts from "Alice's Adventures in Wonderland." He is depicted as a mischievous figure, known for stealing tarts, which leads to his trial in the story. In the context of Alice's Adventures in Wonderland, the Knave is portrayed as a young man who is accused of theft. His character embodies themes of justice and absurdity, reflecting the nonsensical nature of the world created by Carroll.