Danio was a private in the Dendarii Free Mercenary Fleet. A known troublemaker, he was part of a group of four Dendarii that held a wine shop clerk hostage in London on Earth in a dispute over payment. Danio's commander Admiral Naismith talked him into surrendering to the local authorities, and he was taken into custody. He asked Naismith to act as a character witness when his case came up for judicial review, but Naismith declined and delegated Captain Bel Thorne on the grounds that Thorne would be able to lie well on the witness stand.