Dorian Collins

Lieutenant Dorian Collins was a Starfleet officer in the late 24th century. (, Story: Star Trek: Deutschland)

Starfleet career
As a cadet at Starfleet Academy, her performance stood out among many of her peers, and she was invited to join the elite cadet group known as Red Squad. As a member of Red Squad, she was assigned to the USS Valiant (NCC-74210) for field training exercises when the Dominion War broke out and was attacked, resulting in the loss of all of the supervising instructors.

Dominion Wars
She was given a provisional rank of Chief Petty Officer by Cadet Tim Watters, who had assumed command of the ship. She served aboard the Valiant until acting Captain Watters went on a foolhardy pursuit of a Jem'Hadar battleship. She was the only Red Squad cadet to survive. 

Aftermath
She was later returned to the academy, where she maintained excellent grades in her academic pursuits, but was falling behind on field work. One of her teachers, Admiral Belding, recommended her for additional field duties aboard the USS Deutschland (NCC-78659). (ep. Klingon Attack)