Question: Which Marvel Comics character with severe mental illnesses appear in the pilot episode of the American cable television series named after the character?
Sentence (from "Chapter 1 (Legion)"): The episode is connected to the "X-Men" film series, the first television episode to do so, and follows Haller, who believes himself to be schizophrenic until he is interrogated by government agents who think he may be the most powerful mutant discovered.
Relevant evidence: No