Sally Acorn (also know as Princess Sally Elisha of the House of Acorn) prefers to be called just "Sally". Being of Royal Blood, this fifteen year-old, part squirrel (her father)/part chipmunk (her mother), has far from "fallen out of her Royal family tree". She continues her endless quest to return her world to its original state and find her father, the King. He was exiled into the Zone of Silence by the evil Dr. Robotnik during his coup d'etat, in yesterday's Mobotropolis. To achieve her mission, Sally organizes a group of Freedom Fighters, who under her leadership, "strive to survive" and help Sally achieve her goal. Together, with her half-robotic side-kick (ouch!...metal side) Bunnie Rabbot and her "user friendly" pocket computer Nicole! These three "Freedom Fighters" can really kick bot-butt and take names later. Problem is none of Robotnik's Swatbots have names, only numbers. How ironic!! Sally is independent, headstrong and extremely intelligent. She knows that the only way the Freedom Fighters can defeat Robotnik is to work together by combining brains and instinct... Sally's smarts... Bunnie's strength...Sonic's speed...and the entire group of Freedom Fighters' spunk... Sally knows that smells of victory are within reach!!! And only if you can keep a secret: Sally's got a real crush on Sonic -- and you know what?-- the hedgehog likes her almost as much as chili dogs! WAY COOL, HUH??!!!
Sally imparts her expertise in acrobatics to Sonic, showing him the techniques needed to leap vast distances. This skill becomes integral to Sonic's ability to navigate the varied terrains he encounters on his adventures.