Describe a lecturerthat has grudges against her students?

The lecturer is a middle-aged woman with a stern expression and a sharp tongue. She is known for her strict grading policies and unforgiving attitude towards her students. She holds grudges against certain students who have crossed her in the past, whether it be through challenging her authority in class or failing to meet her expectations.

She is quick to criticize and belittle those students she holds grudges against, often singling them out in front of the entire class. She takes pleasure in watching them struggle and fail, relishing in their discomfort and embarrassment.

Despite her grudges, she is still a knowledgeable and skilled lecturer, but her personal vendettas often cloud her judgment and affect her interactions with her students. Many students fear her and try to avoid drawing her ire, knowing that once she has a grudge against them, it is nearly impossible to redeem themselves in her eyes.