Sage is a character in the Sonic the Hedgehog series. She is a humanoid artificial intelligence program created by Dr. Eggman, whom he used in an attempt to harness the technology of the Ancients during the Starfall Islands incident. She is also known as his best creation and "daughter" along with having full access to Eggnet and his said to be the future heir to the Eggman Empire. She is loyal to the Eggman Empire, despite having worked with Sonic and friends to save Starfall Islands.