Gender: Male
Age: Unknown
Species: Unknown
First Appearance: Sonic Adventure (Dreamcast, 1999)
Background: Chaos is the protector of the loveable creatures called Chao. However, Chaos is easily angered and can increase his power by absorbing Chaos Emeralds. When he absorbs all seven of the emeralds, Chaos becomes Perfect Chaos. Chaos was sealed within the Master Emerald by Tikal, a girl whose spirit helps keep Chaos out of trouble.