Random Harry Potter quotes the Potatoes would say;
Aru: "You foul-loathing evil little cockroach!!!"
Mini: "Stop, stop, stop! You're saying it wrong. It's LeviOsa not LevioSA."
Brynne: "I was hungry."
Nikita: "Oh well, just leave him there."
Sheela: "It's sort of exciting...breaking the rules."
The last one is the most iconic one.
Rudy: SSSSSSSSSSSSSSSSSSSSSSSSSSSSSS(The Basilisk)