Big Z

Big Z is a work of 2005 Legends erotic fiction written by Kooriv. It details the first encounter between Mission Vao and Zaalbar, characters introduced in Star Wars: Knights of the Old Republic, and establishes an erotic relationship between them when Vao thanks Zaalbar for saving her from thugs in the Lower City by performing fellatio on him.

Writing and release
Erotic fiction author Kooriv wrote this story as among his earliest works, and created it to explain Zaalbar's nickname of "Big Z" in an erotic context. Although Zaalbar's first encounter with Mission Vao is detailed differently in official Legends material, Kooriv has stated that his story provides "the erotica version of events", and that the official account could be one Vao invented as a cover story to hide the prurient details of her meeting.

The story was released to the Star Wars Erotica Forum on January 19, 2005. Kooriv established additional details concerning some of the story's characters after its release; he named several unidentified characters, including Klak'viv, Pozgak, Doba, and Osstak, and referred to the shared usage of the Wookiee phallic sheath introduced in Shabby Blue's "Chewie's Reward". Kooriv added the story to his Fiction Archive on October 16, 2017.