From Halopedia, the Halo wiki
During the Human-Covenant War, Captain Aoife Septem served as the commanding officer of UNSC Dresden, part of Admiral Preston Cole's Battle Group X-Ray. In March 2526, Battle Group X-Ray participated in the Battle of Biko, defending the planet from the Covenant's Fleet of Inexorable Obedience. During the battle, Dresden was boarded by Covenant troops. While Septem and her crew attempted to repel the invaders from Dresden, ultimately they perished in the battle and Biko fell to the Covenant.
Aoife Septem armed herself with a M6C magnum, which she used to defend herself and her crew during the Battle of Biko. The magnum was later recovered by salvagers following the Human-Covenant War and placed on display at Outpost Discovery, an exploratory initiative launched by the United Nations Space Command.
List of appearances