Middleman is a demon who dresses up as a gentleman: complete with a suit, top-hat and monocle. He seeks out people who no longer see a value in their own life and offers them a deal, their life a year from that day for a large sum of money. To seal the deal he has the person drink a potion called the "Banrikou", which this potion also marinates the organ in question to be devoured by the one who paid for it after the year. This potion gives off an aroma which lures other demons. He also appears to be a bit of a flank, as Kanna commented that he always forgets to inform the customers what they are getting into.