Hardrive is a Brotherhood of Steel recruit who was cut from Fallout Tactics.
A big "guy" with a strong sense of purpose. Hardrive can use most weapons well, but is particularly partial to energy weapons.
According to campaign description file, Hardrive was supposed to be available for recruiting after the Newton mission. But due to some unknown reason she has never made it into the recruiting pool.
Hardrive 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.