The Salad Sisters are two females made out of various vegetables. They are possibly the rulers of Healthadelphia, as they have strict laws against burgers (since they are less healthy than vegetables). They have a helicopter, also made out of vegetables, which they travel in to intercept Sky Burger's deliveries by shooting acidic salad dressing at it. They also use salad tongs as hand weapons.
Both Sissy and Sally both have the ability to shapeshift into various things such as flowers to spy on Healthadelphian residents.
Sissy and Sally both have a hatred for unhealthy foods and (as previously mentioned) have strict laws against unhealthy foods. In "Gauntlet of Humiliation", after finding a group of vegetable kids eating burgers with Pig, they got in their helicopter and began shooting at the Sky Burger's rocket ship (since Pig was retrieved by Chef Jeff shortly after he was found). Their attempts at bringing down the Sky Burger rocket ship failed, and they crashed into the President of the Planet's room.
Both sisters are made out of various vegetables:
Sissy Salad has an onion head with a body mostly composed of either lettuce or cabbage.
Sally Salad has a head composed of cucumbers, carrots and mushrooms, and she has a red bell pepper for a torso. She also has 2 tomatoes that serve as her breasts.