Cyntrina was a Sebacean child on the world that would become the Jocacean Memorial Planet. She and her mother, Kelsa, lived in a peaceful settlement of nurses and children that wound up being besieged by the Venek Horde. Peacekeepers were called in to defend the monastery.
In the midst of the conflict John Crichton, Ka D'Argo, Aeryn Sun, Stark, and Joolushko Tunai Fenta Hovalis appeared from the future. Though frightened, Cyntrina befriended D'Argo. He managed to comfort her, and encouraged her to carve a marking somewhere in the settlement, to ensure that she would never be forgotten. When the time traveling group vanished back to their own time, the Veneks slaughtered the entire Sebacean settlement searching for them -- including Cyntrina.
D'Argo discovered her marking in the present time, keeping the memory of her alive.
Alternate Timeline Edit
In the original timeline that existed before the intervention of time travel, the Venek Horde negotiated peace with the settlement and Cyntrina likely survived for many cycles afterwards.
Cyntrina appears in an episode of Farscape.