Prof. Phyllis Olson is one of the pre-made NPC mathematics professors in Sim State University from The Sims 2: University. She can be made playable by befriending and asking her to move in, or by marrying her.
Phyllis' name is randomized when Sim State University is generated. The name "Prof. Phyllis Olson" is only referenced in the game files. Phyllis has a Lifetime want that was removed prior to release.