Vera Briggs was the wife of Jackson "Jax" Briggs and mother of their daughter, Jacqui; they met while Jax was in recovery after his time as a revenant. Vera is close friends with Jax's former Special Forces partner, Sonya Blade, and is aware of her husband's involvement in the protection of Earthrealm.
Mortal Kombat X Comic Series
Vera called her daughter Jacqui, expressing her concern over having not heard from her daughter in several days when her husband Jax was thrown through a nearby window. Vera quickly ran to his side, and when Jax told her to run, Vera refused, even as the Outworlder Reiko made his way through the wall of their home. Reiko quickly incapacitated Jax, demanding the Kamidogu dagger that Raiden had entrusted him.
Vera greeted the thunder god Raiden when he arrived at the Briggs' farm, explaining to him Reiko's attack, before demanding that Raiden get Jacqui back, seeing him responsible for Reiko's attack as he had given Jax the dagger.
When Jacqui was finally returned to the Briggs family farm, Jax was at first inclined to never let her leave home again, but it is Vera who convinces him to teach her to defend herself. Vera was present and overjoyed to be reunited with her daughter.
In-between the events of the games, Vera died of unknown causes, which provoked the departure of Jax from Special Forces. However, she reappears in her husband's ending, having been resurrected in the rebooted timeline he created. Vera is also mentioned in various interactions between Jax and Jacqui Briggs.