Based on the information in this scene, describe Malvolio.

Even at such an early point in the play, Malvolio's character becomes clear through Olivia's perceptiveness. "You are sick of self-love, Malvolio," she tells him, after only a brief appearance by the steward; Olivia also notes his propensity to make "birdboltsŠ[into] cannon bullets," a charge which later proves true (l. 85-8). Although Malvolio's vanity, arrogance, and self-deceptive qualities are not on clear display in this act, Olivia pegs them down, and her judgment of him does prove correct.