What are the aspects of a character that we want to be available to the simulation? - Physical appearance - General body shape - Height - Weight - Musculature - Hair - Style - Color - Eyes - Color - Mental state - Physical markers - Pain - Pleasure - Perception (Knowledge of things observable) - Beliefs (Knowledge of things not observable) - Desires - Intentions (A commitment to an actionable goal) - Emotional state (Valence-Arousal-Dominance model) - Valence - Arousal - Dominance - Memory (Stored knowledge of previous state of the world)