She’s Geronimo’s arch-rival. She is the bad mouse of the series.
She is the editor-in-chief of a tabloid media company called, The Daily Rat and there is nothing she won’t do to get a scoop.
Deep down, she has always wanted to work for the Geronimo Stilton Media Group, but when Grandfather Shortpaw interviewed her a few years ago, he smelled a rat and didn’t think she had the talent or the dignity to work for his company. Since then, Sally has held a grudge against Geronimo and the Stilton Media Group.