The Little Green Men are extremely mime-like and rarely have much to say when the gang is out on an adventure. They don't appear to show much emotion, often staying still and silent whenever they fall or they are thrown. The only exceptions are whenever they notice an object similar to the Claw, see something excitable, or when speaking to Mr. Potato Head. Though their surroundings within Pizza Planet have convinced them that they are real aliens, they already seem to be aware that they're supposed to freeze when humans are around. Despite their silence, they are shown to love their family and are extremely loyal to their adoptive father, Mr. Potato Head, after saving them.