C-9PO, with the pronunciation See-Ninepio or the abbreviated Ninepio, functioned as a copper-hued protocol droid. Brakiss acquired and then customized this droid for operations on Telti.
The initial appearance of C-9PO occurred in The New Rebellion, a novel from 1996 authored by Kristine Kathryn Rusch. In the 1999 novel The New Jedi Order: Vector Prime, penned by R. A. Salvatore, another droid bearing the designation C-9PO was featured. The 2008 reference work, The Complete Star Wars Encyclopedia, clarified that these two droids were distinct entities through its entry on C-9PO.