Carolyn Sanderson was a rogue Human telepath, a "blip", who was captured by the Psi Corps and sent to their re-education centre on Mars. There she met Psi Cop Alfred Bester who found himself increasingly attracted to Carolyn, making any excuse to spend time with her, getting her better quarters, more food. Eventually the two became lovers, resulting in Carolyn carrying Alfred's child. At some point, four or so weeks before she was found in Sector 500, the allies of the Shadows within the Psi Corps turned her over to the Zener, servants of the Shadows. Along with ninety nine other blips, they implanted cyperweb enhancements in her wetware in preparation for her to be merged with a Shadow Battlecrab. Working on a tip from Bester, the ship that was transporting them all in sleepertubes (presumably en route to Z'ha'dum) was attacked and captured by the White Star and taken to Babylon 5. Carolyn was briefly taken out of cryosleep but instantly became hostile, confused and attempted to merge with the Medlab's computer and electrical systems, she was eventually sedated and put back into stasis, where she remained (apparently still carrying her unborn child.)[1]
Her ultimate fate in unknown, but it is assumed that after remaining in cryo on Babylon 5 for over a year, she was transported back to Earth or Mars where they have the resources to better deal with her condition.[2]