For quite some time, Blaze the Cat has been ruler of the Sol Empire as its princess. She has been known to be protector of the Sol Emeralds of the world. She has her guards, including one named Gardon, do regular patrols of surrounding area of the Imperial Palace every day.
Out of the Blue
One day, an amnesiac Sonic crash-landed near the Sol Empire's Imperial Palace, drawing the attention of Blaze. After spending some time with the amnesiac Sonic, Blaze decided to use the Sol Emeralds to restore his memories. Her plan worked, and Sonic was soon after send back to his world.