A Marvel character with the distinction of being labeled as an "antihero," Frank Castle is a vigilante out for justice against the mob and organized crime in general. He is a master tactician and frequently employs guerilla tactics, demolition, and Special Forces training to defeat his enemies. And he has many, many enemies. His brutal nature and desire to kill has created a sense of intrigue surrounding his character. His psychological imbalance and troubled past have made him quite popular in the Marvel Universe.