- "Things are even worse here than on Zeffo."
- ―Mirienna whilst on Kashyyyk
Mirienna was a human female resident of the planet Zeffo during the Imperial Era. When the Galactic Empire occupied Zeffo for their Project Auger, displacing the citizens of a Zeffo village, Mirienna's husband Ostar led several stormtroopers away so that she could escape with her daughter Sienna. Her husband was killed in his attempt, and Mirienna joined Saw Gerrera's Partisans, sending her daughter to safety on Chandrila, though she later intended to reunite with Sienna.
- Star Wars Jedi: Fallen Order (First appearance)