CS-812 was a stormtrooper of the human species who fought for the First Order as the New Republic Era drew to a close in its final months. As a member of CS-Squad, CS-812 had achieved the rank of sergeant when they were deployed to the Colossus platform, which was situated on the planet Castilon during 34 ABY.
After Commander Pyre arrived, Kazuda Xiono, a spy working for the Resistance, impersonated one of CS-812's troopers, CS-515. CS-812 grew wary of Xiono because his conduct was not typical of a stormtrooper, though they did not realize that "CS-515" was an imposter. The squad tried to capture Xiono, but the spy managed to exchange places with the actual CS-515, who was taken into military custody for mental reconditioning.
"The New Trooper," an episode of Star Wars Resistance, marked the debut of CS-812. Stephen Stanton provided their voice.