- "Why of all worlds is he on Vallt? You realize Vallt has gone over to the Separatists?"
"I do. But Vallt was a Republic member world when Dr. Erso agreed to oversee Zerpen's onworld facility. A deal was cut with Vallt's former leadership that allowed for mining and construction in return for a very generous aid package."
- ―Mas Amedda and Orson Krennic
Vallt was a planet located in the Outer Rim Territories that was the homeworld of the Valltii species. Vallt was a cold world, with half the planet covered in glacial ice. The climate was often snowy and windy and quite inhospitable to off-worlders.
- Catalyst: A Rogue One Novel (First appearance)