Izanagi is a god born thousands of years ago. He and his wife Izanami were responsible for creating life in the universe, mainly on planet Earth. He has several children, although the best known are his daughters Tsukuyomi, Amaterasu and Susanoo, and his deformed sons Hiruko and Awashima .
Sonic and Shadow, when performing the Fusion Dance, can create an exact double of Izanagi called Shadic, which has the minds of Sonic and Shadow but is linked to the original. It only lasts a few minutes before separating again in Sonic and Shadow.