NOTE: This is an article about a character in the post-Zordon and crossover installment, Power Rangers Crystal Beasts . Sendak is the right-hand man of Gaaron, formerly being the first general of Emperor Zarkon before his defeat. He was found later on by Gaaron and was made his general to help retrieve the Crystal Gems and the Gem Beasts. He serves as one of the main antagonists of Power Rangers Crystal Beasts.