Mavas is a minor character in Horizon Forbidden West. He was a Carja Guard who guarded the gate to No Man's Land at Barren Light along with Payiv. He was on guard duty in the leadup to the Embassy where the Carja soldier Fashav was to be handed over by the Tenakth back to the Carja, as he had been a prisoner since his capture during the Red Raids.
When Nozar Arin Khuvaman ordered him and Payiv not to let Aloy past the gate, he protested that she was the Savior of Meridian, though this did not sway Nozar. He and Payiv were reluctant to arrest her on Nozar's orders, and hesitated long enough for Erend Vanguardsman to argue with Nozar about what the Sun-King would think of him obstructing the Savior. When Erend told them to open the gates, he and Payiv obeyed.