From Halopedia, the Halo wiki
Lieutenant Bethany Durruno is an officer who serves in the UNSC Navy and as the navigations officer of the prowler UNSC Dusk in the 2550s.
In 2552, she was at her post during the Battle of Earth, and, under the command of Commander Richard Lash, navigated the ship to Installation 05, following the UNSC In Amber Clad who followed Solemn Penance, the assault carrier of the High Prophet of Regret. She then navigated the ship back to Earth, to Onyx, and back home after the Onyx Conflict.
She was extremely fatigued, the constant action the Dusk had seen took its toll on Durruno, as it had the entire crew.