Nadia Larkin (portrayed by Annette Helde) was a Starfleet officer who appeared in the Deep Space Nine episode "The Siege of AR-558". After her captain and XO were killed, she took charge of the Starfleet unit that had secured a Dominion comm array on AR-558, one of the two planets in the Chin'toka system which was on the front lines of the Dominion War. Her team had been stuck on the planet for five months and lost two thirds of their people, leaving the remainder of the unit suffering from severe physical and mental duress as well as a lack of food and medical supplies.
After a legion of Jem'Hadar had landed on AR-558, Larkin and Nog were appointed by Captain Sisko to scout out the enemy camp. They found the camp and made their way back to base, but the Jem'Hadar spotted them and opened fire. Nog suffered a disruptor wound to his leg and would have to have the leg amputated. Larkin was less fortunate and was killed.