Ms. Hillken is the drama teacher at St. Louis High School.
She was an awarded winning actress, even winning a Golden Square.
At some point she retired from acting and became a drama teacher for St. Louis High School, working there for twenty-two years.
Scooby-Doo! First Frights
Her rehearsals for the talent show were interrupted by the Phantom of the High School Musical. Coach Hayes suspected her because she always disappeared when the Phantom showed up. When the Phantom was unmasked to be none other than Hayes himself it was revealed that she was hiding, not because she was scared, but to protect her award.