Clarisse McClellan is a young girl of 16 years of age that appears early in the book. She represents a conflict for the main character, Guy Montag. She represents individuality, free-thinking, and artistry. When we meet her, she pays no mind to the social constructs and rules of society. In her conversations with Guy, she challenges him to look at the world differently. It is her ideas and behavior that cause Guy to start to reexamine his life and eventually turn his back on the society and ideas around him. The character disappears early on in the book and it is implied that she was murdered by the government for being a free thinker. The audience is left to make their own determinations as to her fate.
clarisse is Guy's neighbor, who opens his eyes to the world of possibilities, she inspires him to be more human and get an imagination, which is what causes guy to keep the book to see what was so important in them.