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Leda is a medtech and wife of Commander Croft, of whom she is not fond.
Leda holds special expertise in the treating of laser wounds, and holds to a medical oath that she will not abandon, despite her apparent dislike for Colonial Warriors.
She is originally a part of Wolfe and Thane's escape plans. However, after Thane dies and Wolfe runs off to his death in a blizzard, she abandons those plans and finishes the mission.
Ironically, she dies by saving her husband from being shot by Vulpa (TOS: "Gun on Ice Planet Zero").