Petro insulted Rogue Squadron's Tycho Celchu (who was undercover as an Imperial pilot at the time) as an Alderaanian coward upon meeting him. Tycho jumped on Petro and struck him several times to demonstrate that he was not a pacifist.
- X-Wing Rogue Squadron 2: The Rebel Opposition, Part 2 (First appearance)
- X-Wing Rogue Squadron 4: The Rebel Opposition, Part 4
- The Complete Star Wars Encyclopedia, Vol. III, p. 22 ("Petro")