Read more about Mayhem at: Wikipedia

Official Site: Marvel

Mayhem (Brigid O'Reilly) is a fictional character appearing in American comic book published by Marvel Comics.

The character of detective Brigid O'Reilly first appeared in Cloak and Dagger #1 (Oct 1983), and was created by Bill Mantlo and Rick Leonardi. She subsequently appeared in issues #2-4 (November 1983-January 1984) of the same series, and issues #1-5 (July 1985-March 1986) of the second Cloak and Dagger series.

In Cloak and Dagger Vol. 2 #5 (Mar 1986), Brigid underwent a drastic transformation and became known as Mayhem. The character subsequently appeared, as Mayhem, in Cloak and Dagger #6-9 (May–November 1986), Strange Tales #13-15 (April–June 1988), #19 (October 1988), The Mutant Misadventures of Cloak and Dagger #1-2 (October, December 1988), #5-6 (June, August 1989), #8 (November 1989), #10-18 (February 1990-June 1991), Web of Spider-Man Annual #9 (1993) and #10 (1994).

Mayhem received an entry in the Official Handbook of the Marvel Universe Deluxe Edition #8. However, some of the color plates were reversed in that issue; those pages, including Mayhem, were re-printed correctly in issue #9.

Mayhem has not been a contender in any CBUB matches.