Prof. Cornelia St. John is one of the pre-made NPC art 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.
Cornelia has the same facial structure as Marisa Bendett. According to her SimDNA in SimPE, her hair was blonde before it turned grey. Cornelia's name is randomized when Sim State University is generated. The name "Prof. Cornelia St. John" is only referenced in the game files.