Onyx Island is an unusual landmass in the future that is home to Silver the Hedgehog, standing in the sea at a slanted angle with part of its surface submerged as a result. The island is home to the ruins of a city, including a library that Silver used in his research to identify a past traitor to the Knothole Freedom Fighters. After identifying Rotor Walrus as a possible traitor based on records he found in the library, Silver departed Onyx Island for the past using one of his Time Stones. One known inhabitant of the island is named Edmund, who allowed Silver the use of the library. The island is also home to interesting artwork, including a painting of the Future Freedom Fighters and a massive statue resembling Lara-Su, one of that group's members.
Silver the Hedgehog