Viro was the owner of a spaceship which transported a Xandarian Snails farm on different planets. He was killed when Leo Fitz and Enoch tricked him in opening the wrong airlock of his ship in order to save Viro's engineering crew.
Recruiting Leo FitzSivos, Viro recruited Leo Fitz, who was actually looking for a place to hide after his spaceship was attacked and pretended to be Sivian. However, once the Lazy Comet was in space and headed towards Naro-Atzia, Viro discovered that Fitz was actually a Human. Viro had Fitz and Enoch, who Fitz had hidden on the ship, captured by his men and threatened to have them killed.
Viro, who figured out that they were running away from another enemy, let Fitz and Enoch a second chance when Fitz told him that he was the only one who could repair the persistent damage his spacecraft had sustained. Later, however, Viro told Fitz that since he was extremely efficient, he would only keep Fitz and Enoch working for him for free while he would get rid of his other engineers to spare their wages.
Shutting down the airlock, Viro commented on how the woman Fitz was eager to find would have to replace him as well. He then activated the airlock's opening to kill all those who were locked inside. However, it turned out that Fitz had already considered this undesired outcome and had actually switched the commands, causing Viro to accidentally open another airlock on Viro's side. As a result, Viro and his guards were sucked into space and died.