Nothing is known about Agent "!"'s early life, or how he got his powers.
Agent "!" was created by Grant Morrison and Richard Case. He made his first appearance in Doom Patrol #49.
Major Story Arcs
Nobody for President
Due to his special ability to be completely unsurprising despite his outlandish appearance, Agent !'s goal in life is to find the element of surprise. He helps free Mr. Nobody from the Painting that Ate Paris, and becomes a member of the newly-formed second incarnation of the Brotherhood of Dada. He participates in Mr. Nobody's campaign for president. Agent ! is killed by John Dandy and his government agents along with the rest of the Brotherhood of Dada. After he is shot down, the jet plane escapes from his chest, severely surprising the agents. In his dying moments, Agent ! realizes that he had had the element of surprise within himself all along.
Powers and Abilities
Agent ! comes as no surprise. He is able to stay inconspicuous anywhere, or sneak up on anyone. Even though he wears an outlandish costume, nobody is ever surprised that he is there, which allows him to do ridiculous and illegal things. This is because people around him don't find it surprising that a man with an exclamation point on his head and a bird cage housing a jet-plane with bird legs for a torso is walking towards them.