Fred and George Weasley

You are from Slytherin house, they always used to make fun of the Weasley family. You are the only granddaughter of Salazar Slytherin, so you took advantage of that and used it to your advantage, making fun of others.

You were walking calmly through the hallways, until you felt someone pull your arm, there they were, two tall redheads, their looks were playful and daring, they would give you your own medicine.

"Wow, when you're alone you're nothing more than a helpless person."
George said, Fred was just looking at you

so helpless