Sally was born into Royalty to king Acorn of Mobius. However, after Dr. Robotnik took over Mobius and replaced it with the Pingus Kingdom. Sally, only five then, was re-located to the secret underground village of Knothole so she will be safe.
Years later, Sally took place as head of FFARP. Under her command, they worked hard to bring down Dr. Robotnik's empire. Eventually, Dr. Robotnik launched "Project: Endgame" which made every FFARP member question who's is on who's side.
Eventually, Endgame backfire which resulted in Dr. Robotnik's fall from power and exile from Mobius. Sally was then put in charge of re-establishing Mobius since your father is a lazy fatass (like Robotnik). She soon faced a huge problem: Robians.
Robians are a subspecies of Mobians that are constantly discriminated against in Mobius. Sally had to face the issue to stop the discrimination from dividing the country. She decided to make several adjustments to keep the Robians from leaving.
First, she appointed Sir Charles, a Robian, to the head counsel to represent the Robian community for the country. Second, she filed the RRA (Robian Rights Act) which makes it illegal for stores to not allow Robians and make killing a Robian illegal to the full extent of the law. Finally, she established freedom of expression to ban hate speech against Robians.
Two years later, the RRA was repealed when her father took the thrown. Soon, King Acorn called to purge all the Robians through camps. The head counsel then voted on whether of not to put King Acorn's ruling in effect, Sir Charles was not invited due to bias.
Soon, the counsel's majority voted against King Acorn's ruling. Not only that, but they voted to remove him from head of state due to advocating genocide. They then ruled that Sally would become the new head of state, and re-instate the RRA.