Amy Rose (Another Time, Another Place)

Amy Rose is a young, carefree hedgehog who appears in an alternate reality.

History
When she was younger, Amy was kidnapped by Doctor Eggman's robot, Metal Sonic, and held prisoner on the Little Planet. She was soon rescued by Sonic after he'd outraced the robotic douppleganger. (SSSM: #3)

Much later, Amy appeared as one of the many guests attending Sonic's birthday party, all of which would end up being kidnapped and scattered through time by the mysterious Time Eater. (StH: #230)