Piemon rules the dark wastelands and presides over the "Nightmare Soldiers", a demonic army which includes LadyDevimon, and a multitude of Vilemon. Piemon is the toughest of the Dark Masters, as well as the most cruel; he also has a sadistic sense of humor, often cracking jokes and laughing hysterically. He is a master of deception and trickery. Despite this, he respects his comrades and treats them as equals.