Hailing from an unknown world or system, Brace Marko was born before the Galactic Civil War began. Learning the skills to become a pilot, Brace joined the Rebel Alliance, and served in the Alliance Fleet. In 0 BBY, Brace was stationed at the Great Temple on Yavin 4 and flew a BTL Y-wing starfighter for Gold Squadron.
Given the callsign as Gold Six, Brace flew with the squadron towards Scarif and participated in the battle while the rest of the Admiral Raddus' fleet arrive to support Jyn Erso and her team known as Rogue One that were fighting to steal the plans of the Galactic Empire's superweapon known as Death Star.
- Rogue One: A Star Wars Story (First appearance) (Fighter only)
- Star Wars: Rogue One: The Ultimate Visual Guide (First identified as Brace Marko)
- Star Wars: Absolutely Everything You Need to Know, Updated and Expanded