Roberta is the one of the characters from the book and the series.
She is a kind of blue dog that of shoes 56. She never finds her foot in shoe stores. His foot size and awkwardness that it fails badly quavers foot without purpose. Camille noticed her discomfort and appears quite nice with it. Roberta's feet are so great that everyone makes fun of her. Roberta becomes Superbigfeet, she finds herself with feet on air that allow it to move at high speed cushion...to levitate slightly in the air: it can move at very high speed "as if she was riding high on the air." We learn in an episode of the Minimighty Squad, she is secretly in love with Nathan.