Mister Miracle is an adopted son of Darkseid (he is called Scott or Scotty) and a potential ruler of Apokolips but has chosen to flee to Earth where he earns his living as a stage magician. He wears a red superhero costume with yellow pants and face mask and also has green gloves, boots, belt, and cape with raised collar. He is well-built and athletic, describes himself as a "master of escape", and acts like a showman, shouting out his name to encourage applause and adulation.
He carries a small spherical device, which is probably technology from Apokolips, and it is able to store the part of the Anti-Life Equation that he has stolen from Darkseid. It can also create a smokescreen or lighting effects to enable him to escape from awkward situations. As he is an escapologist, Batman is unable to keep him tied down and he is able to employ sleight of hand to steal things.
Mister Miracle is the boyfriend of Big Barda, but she is suspicious of his sincerity.