- "Brea and Senni Tonnika, I do believe. How nice of you to drop back into sight again. You can't imagine how brokenhearted Grand Moff Argon has been since your departure. I'm sure he'll be pleased to see you again. As well as the twenty-five thousand you stole from him."
- ―Colonel Parq
Argon was a male Imperial Grand Moff during the Galactic Civil War. He was conned out of 25,000 credits by the Tonnika sisters and vowed to track them down no matter where they hid in the galaxy. Agents loyal to Argon were deployed during the search for the droids C-3PO and R2-D2 on the planet Tatooine after the theft of the Death Star plans, including Colonel Parq. During the search, Parq arrested two women who he believed to be the Tonnika sisters in Chalmun's Spaceport Cantina; in reality, they were the Mistryl Shadow Guards Shada D'ukal and Karoly D'ulin who had disguised themselves as Brea and Senni Tonnika while on Tatooine.
- Hammertong: The Tale of the "Tonnika Sisters" (Mentioned only)
- Galaxy Guide 1: A New Hope
- The Movie Trilogy Sourcebook
- Galaxy Guide 1: A New Hope, Second Edition
- The Essential Guide to Characters
- Star Wars Encyclopedia
- The Complete Star Wars Encyclopedia