Miss Margaret Skullnick is one of o Star vs. The Forces of Evil. She's a teacher at Echo Creek Academy who doesn't take her job seriously. She also appears to have a short temper, as she snaps at Marco when he asks if he needs a hall pass to go to the principal's office.
Originally, She was once human, but now she is a Troll after Star transformed her by accident so she could get a better grade.
Interdimensional Field Trip (Season 1, Episode 12A) Edit
Miss Skullnick flexes a huge arm when she learns trolls are strong, then is kinda muscly the rest of the way, at least more than normal.