male
Onomatopoeia first appeared in Green Arrow Vol 3 #12 in 2002 and was created by Kevin Smith and Phil Hester. Onomatopoeia is an enemy of the Green Arrow and hitman who imitates sounds that he hears, such as explosions.
Onomatopoeia (DC Comics)
Batman
for Batman in What Fictional Character has the best rogues gallery?
Suggested by jamesstorey
rogues gallery
