

Imagery of what cancer can do to a person is, obviously, rampant in The Fault in Our Stars, but Caroline's case is perhaps more gruesome than any of the other cases of cancer in the book because of its influence over her emotions, personality, and relationships.

Even with this limited information, Green creates a terrifying, enthralling, and tragic image of Caroline. The character Caroline, Augustus's prior girlfriend who died of a brain tumor that changed her personality and ability to control her emotions as her illness progressed, is formed entirely from a few conversations between Augustus and Hazel and what Hazel is able to read publicly on Facebook.
