Jill Fairchild is one of the pre-made townies in Académie Le Tour from The Sims 2: University. She can be made playable by befriending and asking her to move in, or by marrying her. Jill has the same facial structure as Jennifer Custer.
Her skills and interests are randomized upon loading Académie Le Tour. It is only referenced in the game files that she has no skills, interests or Major. Even though Jill has brown hair, her SimDNA in SimPE confirms that her natural hair color is red.
Her name is randomized when Académie Le Tour is generated. The name "Jill Fairchild" is only referenced in the game files.