Sonic, or as they're more commonly known, Rewrite, is an entity that is the result of several rewrites of the original Sonic.EXE game, resulting in greater self-awareness, egocentric (calling himself a God, and the player a nobody) demonic entity with the given purpose of being a digital version of God himself, but (obviously) going rogue, killing his creator, and some of Sonic's companions. Being able to possess the souls of other beings to use them as accessories or take their physical forms.