Dirdos was one of the three Abulurd Harkonnen's sons, born on Lankiveil during his exile. One day Dirdos found his father's old green-and-crimson uniform from the Army of Humanity, which he kept stored away, and tried it on. When Abulurd saw his son he immediately took it away and burned it. But that only inspired the Harkonnen children to make up new tales of lost glory.