Miss Darbus is East High's Homeroom and drama teacher and takes drama way too seriously. She also sponsors the Drama Club, which has Sharpay and Ryan Evans as its co-presidents. Due to financial hardships, she is currently living at the school.

Miss Darbus has a great disliking for cellphones, and is known to hand out detentions to students she sees that are using one. Her detentions consist of making students help with painting sets and creating props for the drama club. She also has a great disliking for basketball, and is constantly at odds with the East High basketball coach, Jack Bolton, who is also Troy's father.