Klanker is a polymorph who can transform his body into a variety of metal objects. He's been shown to turn into an anvil and an iron chain. He also has a form of Tourette's Syndrome that causes him to randomly shout out obscenities. This appears to be beyond his control, and causes him great embarrassment afterwards. The rest of Super Duper appears to accept his problem, and are constantly reassuring him that it's "not his fault".