Rachel Warren was a very bright student, who saw her future at an early age. She went to medical school to become a doctor, but not as a normal civilian doctor, but as a FBI medical agent. She finished with her medical education and moved onto the FBI academy for her final stage of training. While at the academy her skills where noticed by several members of S.N.A.I.L. Tom Nipple took the chance to ask her to join this special branch of the FBI. She took the chance but did not know what she was really getting into.

An early part of her time in S.N.A.I.L. she became interesting in there experimental robotics and exoskeleton program. With her training, and her high mental endurance she was able to become one of the first to field test the equipment. She was given the right to use the gear, but do to unseen events she was only able to pilot the exoskeleton once.

With the unseen event at the end of the teams mission to destroy the Sollreotin chemical plant, (See Belly of the Beast for more information), she would be without her exoskeleton for some time. The group would find her very valuable with her medical skills. She would suffer for her investigative skills. She would loose her right arm because of some unknown blob like creature. A mystic shaman would give her, her arm back. Sometime later when the group was making a last stand to try and return home, Rachel would be shot, and then attacked by a man-dog and would finally die from the wounds.