Dean Hardscrabble is the antagonist turned supporting character in 2013 Disney/Pixar's animated film Monsters University. She's a dark red dragon-like monster with millipede-like legs and red bat wings. She sees Mike Wazowski as a non-scary monster and made a bet with him and wants him to leave Monsters University.
Dean Hardscrabble flies into Professor Knight's classroom, causing all of the lights in the room to go out with a single flap of her wings. Hardscrabble then tells all of Professor Knight's students that they all have to complete a final exam so that they can enter the Scaring Program or else they will be kicked out of the school. The dean sees Mike and Sulley get into a big roaring match, ending with both monsters accidentally breaking the dean's prized scream canister. Despite staying calm about it, the dean has the two kicked out of the School of Scaring. Because Mike is unable to scare anyone and Sulley never studies or completes his homework.
However, Mike and Sulley find out that the only way to get back into the School of Scaring is to compete in the Scare Games with a fraternity of rejected monsters called Oozma Kappa. And as a result, Mike makes a deal with the dean that if they and Oozma Kappa win the Games, he and Sulley can go back to MU. But if they lose, they will have to leave the school forever.
During the Scare Games, Dean Hardscrabble is secretly watching Mike and Sulley competing from afar, aware that they are both going to fail. But after Oozma Kappa wins the Games when they beat Roar Omega Roar in the final round with the scare simulators, Sulley tells the dean that he cheated by setting Mike's simulator level to easy just to make Oozma Kappa win since to him it's a no-win situation for them otherwise due to Mike's inability to scare. The dean orders him to leave the campus and she calls him a disgrace to both the university and his family name.
When all of a sudden, she is alerted that Mike had secretly snuck into the door lab. She tries to have Don Carlton arrest and she tries to stop Sulley to go in the door to save his friend. The dean then shuts down the door in question, which led to a cabin at a campsite until the authorities arrive, but Mike and Sulley manage to escape back by scaring several human adults in the form of a team of police officers.
The dean then has both Mike and Sulley expelled from Monsters University permanently, but was sad to let them go because their actions, while considered as a major offense to her school, ended up surprising her. Dean Hardscrabble ultimately gives in and decides to give the two monsters a second chance at life by having them both work at Monsters, Inc., much to their delight.