Oro was a Mon Calamari of male gender, existing in the era of the Galactic Civil War.
Serving as an aide to Mon Mothma, the leader of the Rebel Alliance, Oro, a male Mon Calamari, was secretly a double agent working for the Galactic Empire. During the year 0 ABY, Oro spent time on the Imperial prison planet Tol Ado with Imperial General Sebastian Parnell, where he divulged information that jeopardized an Alliance mission in the Sil'Lume system. After this meeting, Oro left Tol Ado on a starship, unaware that Luke Skywalker, an Alliance member who had secretly boarded the vessel, was observing him. Oro eventually arrived at the Rebel base located on the moon Yavin 4. Following Skywalker's arrival at the base, General Jan Dodonna requested Skywalker to attend a meeting with Mon Mothma and Oro to discuss the compromised Alliance operation. Skywalker immediately recognized Oro and realized that the Mon Calamari had betrayed the Sil'Lume system operation, and in response, Skywalker drew his lightsaber and threatened Oro by holding it at his throat.
Troy Denning conceived Oro, who then made an appearance in a role-playing segment within the 1990 Jedi's Honor supplement for the West End Games role-playing game.