The answer is: direct.
Direct characterization occurs when the author discloses a character's personality features in a straightforward manner.
In the excerpt from "The Wild Things," the writer Dave Eggers details Claire's temperament in an explicit way, particularly as regards her relationship with Max. For example, she is almost fifteen and is not too impressed by him. As a matter of fact, she feels irritated by him and possesses a general tendency of dissatisfaction.