|The following is based on Fallout Tactics cut content and is not canon.|
Slicer got the highest votes in the 22nd Appleton "Girl most likely to stay a Virgin" contest, primarily because most of the men she has known have met bizarre, disturbing and sometimes inexplicable ends.
According to campaign description files, Slicer and Fleetfoot were supposed to become available for recruiting after the Rock Falls mission as a reward for completing some optional objective (possibly rescuing Nanuk). But due to some unknown reason they have never made it into the recruiting pool.
Slicer was supposed to appear in Fallout Tactics but never made it, either due to being cut from the final game or due to a bug.