a short time later betsy, her devoted companion, hank the mule, and toto arrived at the gates of the emerald city and were greeted by omby amby, the soldier with the green whiskers. he was very tall and wore a handsome green and gold uniform with a tall plumed hat. his long, green beard fell below his waist making him look even taller. in addition to being the keeper of the gates, omby amby was also the royal army of oz, princess ozma's body-guard and the police force of the emerald city.