Sall-E is Doctor Aye-Que's failed invention (a robot, to be precise) that is staying at Wall-E's home. Originally meant to have the shape of a penguin, Sall-E does good deeds and is against her creator. She is friends with Zed, who secretly likes her. Sall-E does not like 'Bark' the evil robot 'dinosaur', whom plans to take over Antarctica, although this has been proven false time and again. Other than Zed, Sall-E, fourth-wall breakers and Matthews, no one knows what a 'Wall-E' is. It is said to be a male version of Sall-E that comes from another dimension, particularly 2300 Earth.