Gates is the section commander of The 6-4, a faction of bounty hunters and freelance Titan pilots. Gates is a Grapple pilot, and like Davis, Droz, and Bear, she wears a helmet from the first Titanfall.
She first appears in the mission The Ark, along with three other members of the 6-4. She, along with Bear, Davis, and Droz, assist Pilot Cooper in the hijacking of the IMC Malta.
After clearing the bridge with the help of the others, she and the 6-4 provide cover fire during Cooper's battle with Viper. They maintain control of the Malta and use it to prevent reinforcements from surrounding Cooper, with Gates reassuring Cooper that they have his back.
She escapes the battle before the planet explodes, as she is alive to be the 6-4's multiplayer announcer.
Gates was originally concieved as a female alternative to Jack Cooper; this is because Titanfall 2's campaign was originally going to allow the player to choose the player character's gender. As development continued, this feature was scrapped and Gates became a separate character entirely.
In the Titanfall 2 Tech Test and in the multiplayer at launch, Gates used a model that was essentially a re-textured Jack Cooper, and even had the same tattoos. This was changed to her proper campaign model in the A Glitch in the Frontier update.