Split personalities are basic personality differences that jump from moment to moment. Mechanically, the differences in personality must be explicit and defined. This means a separate main Compulsion for each as well as unique Behavior that makes them all distinguishable. None are ascendant except a default one. Individual personalities will have preferences and beliefs in their own capabilities that are not backed up by actual proficiency or study. They will insist that the body use implements, weapons, armors, etc. that comport with their reality regardless of its actual efficacy.
Triggers: Negative stress & Disorienting Anxiety.