Lorna Simon

Commander Lorna Simon was a veteran Starfleet officer, who in her 60's deferred retirement in order to serve as first officer and science officer aboard the USS Enterprise in the 2240s.

Simon had developed a good working relationship with Captain Robert April, who viewed her as a strict grandmother figure and stabilizing influence on the bridge, and was always quick to offer advise to her captain. (TOS short story: "Though Hell Should Bar the Way").