Matilda is the commander of the Medea Supply Unit. In accordance with General Revil's special order, she continues to send a large amount of supplies to White Base without any escort, using only Medea transport planes in a daring formation. She has a strong belief in her job, and feels a strong attachment to White Base. Her supplies are an oasis that quenches the thirst of the White Base crew, who are exhausted from fighting alone and without support. Due to her stunning beauty, she became the dream girl of many of the young male crew members staffing the White Base, especially the young Amuro Ray.

When the ship reached Asia, Matilda gave the White Base orders to head to Ukraine to take part in Operation Odessa, a large-scale military operation to wrest control of the mining facilities at Odessa away from the Principality of Zeon. However, en route to participate in the battle, the White Base was attacked by the Zeon ace pilot trio, the Black Tri-Stars. In order to protect the White Base, Matilda rammed her Medea into one of the Black Tri-Stars' Doms, in an attempt to knock it down.