She is the girlfriend of protagonist Nicky, whose alter ego is Sonic, and is unaware that they are identical.Antagonist Anton Brooke is also attracted to her; he kidnaps her a number of times, forcing Nicky to become Sonic and rescue her.She sends Sonic fan mail, but Eggman intercepts it and kidnaps her.Sonic rescues her and Tails (another Freedom Fighter captured by Eggman), and they leave for the city of Mobotropolis.
Matching Sonic Boom's shift in tone, Sonic series newcomer Big Red Button Entertainment wanted her to be a more capable character to stand out from Sonic and offset her frequent placement on game sidelines.
Attacking one of Eggman's machines, Sonic triggers Chaos Control and sends him, Amy, Tails and other characters from their world to Earth.
During the first and second seasons Amy and her friends—often without Sonic—are frequently together, capturing (and recapturing) Chaos Emeralds from Doctor Eggman and adjusting to their celebrity status on Earth.
With Sonic, Tails, Knuckles and (in the latter 2 games) Cream, she frees animals from inside Eggman's robots to keep him from building an empire.
Worried about Sonic (whom she has not seen in over a month), Amy finds his picture in a newspaper and joins Cream and Big to look for their own friends: Cream for a Chao named Chocola and Big for his frog friend Froggy.
She became more "agile and graceful", able to perform difficult physical tasks with ease.