This category is for villains who have any type of psychological disorder and can be deemed as mentally unstable or villains suffering from mental disorders such as Posttraumatic stress disorder, Dissociative identity disorder(Dissociative villains), Schizophrenia and psychosis.

In addition, a villain who is perfectly meaningful, coherent, and stable can still be qualified as mentally ill if the evil deeds they perform go beyond the usual psychopathy by being extremely fiendish and malevolent, the reason being that no sane individual would think it acceptable to take villainy to the degree that they do.

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