Onomatopoeia is a super-villain who only speaks in sound effect words and his own name. His origins are mysterious, but he uses expertise in martial arts to kill super-heroes. The costumes of his victims are taken as trophies. This has made him an enemy to both Batman and Green Arrow. He has been a member of the Secret Society of Super-Villains. Onomatopeoia was created by Kevin Smith and Phil Hester, first appearing in Green Arrow (Volume 3) #12. (2002)

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