AI Summary of info looked up:
1. The Theory of Structural Dissociation
The Key Researchers: Onno van der Hart, Ellert Nijenhuis, and Kathy Steele.
The Core Idea: They explicitly address the "forced personality role" you brought up. Their work shows that chronic childhood trauma and neglect literally split the developing personality.
The Breakdown: They identify that a survivor splits into an Apparently Normal Part (ANP)—the cold, flat, polite, functioning adult shell that goes to work and handles mechanics—and an Emotional Part (EP), which holds the hidden, frozen terror, rage, and shame of the childhood years. They argue that this isn't a "feeling," but a structural alteration of the brain and personality architecture designed purely to ensure physical survival at the cost of actual life.