Brief analysis of Pinkamena personalities
Response to the question:"There's one thing I don't understand about pinkamena art, why do people always draw her with straight hair? She's not depressed when slaughtering...if anything, she's happy as hell."
Most people seem to be unaware of the significance of the timeline and the difference between the two non-canon Pinkies/Pinkamenas:
Cupcakes Pinkie Pie: Cupcakes was written before either "Party of One" or "Cutie Mark Chronicles" aired and, at the time it came out, she was depicted with her normal curly hair. "Cupcakes Pinkie" is a sadistic psychopath, basically just a psychopathic variant of her canon self.
Pinkamena: Pinkamena, with straight hair, is a classic depressive schizophrenic with comorbid MPD (Multiple Personality Disorder) tendencies. It is interesting to note that this is very much in line as a valid possibility for her canon character who, as shown in the show, displays very strong characteristics of Schizophrenia: Delusions, Disorganized speech, and G