Ace is the recurring villain who leads the green-skinned criminals known as the Gangreen Gang in The Powerpuff Girls.
Ace is the gang’s smooth-talking leader and is usually shown wearing sunglasses, a black jacket, and a confident expression. The Gangreen Gang operates in Townsville and often commits relatively low-level crimes, but its members can become significant threats when they exploit the girls’ trust or vulnerabilities.
The group’s name combines “gangrene” with “gang,” reflecting its green visual design. Other members include Snake, Arturo, Grubber, and Lil’ Arturo, though lineups and naming details can vary across appearances.
Ace is sometimes confused with other recurring villains because the gang functions collectively in many episodes. The precise answer is Ace, the leader—not Gangreen Gang, which is the name of the entire group.