Define your chosen character in terms of whether he is the protagonist (hero), antagonist (villain), supporting player (a helpmate of either the hero or villain) or a catalyst. A catalyst character (also referred to as an agent for change) often does not participate directly in any of the action, but instead fulfills the role of inspiring the lead character to take up a cause or quest he might otherwise not have pursued (for example, Spider-Man's kindly uncle who gets killed early in the story would fit this definition).

Pay sharp attention to the subtext of your character's actions and what they really say about him.

Discuss the character's interactions with others and whether the character treats them as superiors, peers or subordinates. Assess whether these interactions are consistent with or contrary to your expectations of their assigned roles.