Jervis Tetch is fascinated with hats of all shapes and sizes, as well as Alice's Adventures in Wonderland and its sequel Through the Looking-Glass, particularly favoring the chapter 'A Mad Tea Party'. He is obsessive-compulsive, highly delusional, suffers from psychotic manic depression, and can even sometimes be a dangerous homicidal. He exhibits delusions and thought processes typical of schizophrenia. Not only is he often known to quote and reference Carroll's Wonderland novels, but he often fails to discern between these stories and reality. As shown in Secret Six, he won't eat a piece of food that doesn't have a hat on it. It has been hinted in recent years that he is a paedophile, kidnapping little girls with the name "Alice".