Chaos is an immortal, ageless, god-like creature that seems to be composed entirely of water (coincidentally, Sonic, has a weakness of water), but is also said to be concentrated Chaos Emerald energy.
Before Tikal's father and his soldiers came to the place where Chaos and the Chao lived, Chaos was a very loving and gentle creature, being very protective of the Chao and possibly Tikal. But after the Chao that Chaos guarded were injured, Chaos became evil minded and furious at other beings and became completely consumed by anger and rage. When unleashed in the present time, it wanted nothing more than to collect the Chaos Emeralds, destroy Station Square and eventually the world. However, when Super Sonic neutralized him, he turned back to his former self and was joyful to see that there were still Chao in the world.
- Harnessing Chaos Energy