Rules of Engagement

Rules Of Engagement is an episode of Ben 10: Omniverse.

Characters

 * Ben Tennyson
 * Rook Blonko
 * Julie Yamamoto
 * Ester

Villains

 * Princess Looma
 * Fistina

Aliens Used

 * Armodrillo

Trivia

 * It is revealed in this episode that Fistina has a crush on Rook.