Most of Mayorness's history is classified, mainly due to her romantic involvement with Mayor. The two met while Mayor was working as a trainer at the military's Covert Ops school. The two hit it off and eventually married several years later. After they served their time, the two began working under military contracts, often working hand-in-hand with the GI Joe team. While Mayor mainly concentrates on field work, Mayorness maintains the day-to-day at the Mayor Complex, working as a liaison between Mayor and the Joe team.

Specialized Education: Covert Ops School; Covert Electronics.
Qualified Expert: M-1911A; Heckler-Koch HK G36; Heckler-Koch HK PSG-1.