Callie-141

"αἰὲν ἀριστεύειν (aièn aristeúein)"

- Ever to Excel

Chief Petty Officer Callie Hall, designated as SPARTAN-141, was a Class II, SPARTAN-II commando under the UNSC Navy's Special Weapons division of Naval Special Warfare. She is known by her codename as "Calypso", given to her by the Office of Naval Intelligence during her work with the Beta-4 Division.

Born on February 15 th, 2531 on the UEG colony world of Emerald Cove, Callie was the only daughter of a renowned stem cell biologist, Dr. Howard Hall, of the Roy Magnusson Institute of Science. Her mother, Stacey Hall, was a career physician based off Earth. Due to the threat of the Human-Covenant War, evacuation for Emerald Cove was initiated in 2535, and its inhabitants were relocated to Halcyon, a UNSC "refugee colony". Two years later, Callie would be secretly conscripted for the SPARTAN-II Program as part of its second class of elite supersoldiers, successfully undergoing the Program's augmentation procedures in 2545.

By 2550, Callie, or Cal, as she came to be known, had participated in numerous ground engagements of various kinds, including EVA operations, against the Covenant Empire. Her untimely death would be at the hands of a Jiralhanae War Chieftain during a classified military operation on a Covenant-held planet called Heian.