Madeline is most likely a Bard, due to her outspokenness, rousing speeches, and use of impersonations.
Pepito with his impish nature best fits the warlock category, though could easily be viewed as an artificer thanks to his proficiency with tools and building.
Ms. Clavel is a cleric.
The Idiots: The tutor is a Rogue, mastermind subclass, with the remaining spaces occupied by fighter/rogue multiclass.