Bast Castle…This is Imperial shuttle Tridius. You are ordered to make ready to receive your Emperor!"
- ―The Tridius approaches Bast Castle
The Tridius was a Lambda-class T-4a shuttle that was the personal shuttle of the Reborn Emperor Palpatine. It was distinguished a gray stripe that ran from the nose of its cockpit to its stern. In the year 10 ABY, the Tridius ferried the Emperor and Dark Side Elites Xecr Nist and Tedryn-Sha to Bast Castle on the planet Vjun.
- Dark Empire II 6: Hand of Darkness (First appearance)