Chaos

カオス

Chaos is an executive of the Secret Society who suddenly and inexplicably lost his memories and became completely insane. Despite this, he retained his position within the organization and entered the second Toshinden tournament under orders to eliminate the traitor Gaia. After the Secret Society collapsed at its conclusion, Chaos somehow managed to survive and took part in the third tournament.
During the events of the fourth tournament, Genma possesses the shield once carried by Chaos, suggesting a high probability that he was killed by him.