Kathrin Grunwald (November 19, 2517- February 9, 2637) was a German-born UNSC Naval officer who served in the Human-Covenant War, Remnant War, Galactic War and into the Swarm War. Grunwald first served aboard the Marathon-class cruiser UNSC Absolution between 2537 and 2551, eventually attaining the rank of Lieutenant in December of that year.