Areel Shaw

From Memory Alpha, the free Star Trek reference.

Lieutenant Areel Shaw was the Starfleet JAG officer assigned to Starbase 11. In 2267, she was the prosecuting attorney in the court martial of James T. Kirk for the death of Benjamin Finney.

Shaw and Kirk had been romantically linked in 2262. The relationship did not work out, but they parted as friends. Despite this personal history, Shaw maintained her professional integrity and presented a strong case against her former lover that was only refuted after an investigation began by Commander Spock revealed the truth of Finney's frame up. (TOS: "Court Martial")

Areel Shaw is the only female Starfleet officer to wear a dress uniform in the entire run of the original series. She was played by actress Joan Marshall.