As a battle droid of the Trade Federation Droid Army, OWO-3 functioned as a gunner. He was stationed aboard the Trade Federation flagship named the Saak'ak (Lucrehulk-class LH-3210 cargo freighter variant). In 32 BBY, prior to the Invasion of Naboo, Chief Gunner Jull Dremon gave OWO-3 the order to destroy the Radiant VII, a Consular-class space cruiser belonging to the Republic Diplomatic Corps'. At the time, the starship was docked in the Saak'ak's hangar. OWO-3, together with other battle droid gunners, precisely executed this order, using a droid laser turret to obliterate the Radiant VII.
The initial mention of OWO-3 occurred in 2006 within the Databank entry for Antidar Williams on StarWars.com, a creation of Hyperspace member Ian Tapley. He was formally identified as OWO-3 on January 21, 2014, in "The Devious Neimoidians Revealed," an article by Tim Veekhoven, Sander de Lange, Kevin Beentjes, and Leland Chee. This article was featured in issue 147 of Star Wars Insider magazine.
- "Lt. Antidar Williams: A 'What's the Story?' Story" — The Dark Side Databank — Ian Tapley's StarWars.com Blog (content now obsolete; backup link)
- Lt. Antidar Williams in the Databank (content now obsolete; backup link) (First mentioned) (Indirect mention only)
- " Rogues Gallery: The Devious Neimoidians Revealed " — Star Wars Insider 147 (First identified as OWO-3)