Mam'zelle Dupont is one of the two mistresses of Malory Towers. She is very plump and jolly and has a bun on her head. She likes talking about her family in France and the students like to listen to her because then they don’t have to learn french verbs. She does not like the other french mistress Mam’zelle Rougier.

Mam'zelle Dupont is a victim to many tricks planned by Alicia,Betty and June.The first ever trick in which she fell to was when Alicia became deaf. She shares a study with Miss Potts. Her favourite students are Nora, Daphne Hope and Bonnie. She has a sense of humour too. Inbthe fifth she gets the students back for tricking her by buying trick teeth. She is terrified of spiders and cats.