Irene Maiden is one of the original teachers of Monster High.
Irene Maiden is one of the original teachers of Monster High, who got herself somehow stuck in a Greek statue without anyone knowing. She remained locked up for 2000 years.
Irene Maiden is a reference to the iron maiden, a torture device invented sometime around 1800 as a fake remnant of the "barbaric" Middle Ages. The iron maiden is an iron cabinet that people could be locked inside, which reflects the fact that Irene Maiden was trapped in a statue. If someone was put inside it, the person either immediately died or bled to death by the pins inside the cabinet.
While walking in the hall, Cleo and Frankie collide and one of Cleo's bandages gets stuck around Frankie's neck bolt. Cleo shoves Frankie away, and Frankie's neck bolt breaks Ms. Maiden's statue. Due to a lie by Cleo to blame Frankie for the broken statue, Frankie ends up being solely credited for freeing Ms. Maiden.
It is unknown if she resumed her job as a teacher.