Princess Sally Acorn is one of the main protagonists in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. She is a Mobian chipmunk, the daughter of King Nigel Acorn and leader of the Freedom Fighters. Born as the heir to her fathers throne, she was taken, as a child, to the sanctuary of Knothole Village in the Wood Zone by Rosie Woodchuck when her father was betrayed by his royal adviser, Dr. Eggman and led the Freedom Fighters on many field missions against the scientist when he took power after banishing the King to the Special Zone. After Nigel Acorn was rescued and resumed his role as king, Sally continued to lead the Freedom Fighters in the ongoing battle against the Eggman Empire. If you're wondering about the 2nd image it was an older design of Sally before the final design.