It's clear from the get-go that Minerva McGonagall is a powerful witch. Not just because of her sweeping black cape and her enormous witch's hat. She is an imposing character, especially when she raises her wand.
The wizarding student Ron Weasley™ supports his friend Harry Potter™ in the in their quest to destroy Lord Voldemort. Meanwhile, Scabbers™ the rat is often dismissed as quite useless.
His black cloak flutters, his pitch-black hair frames his pale face: Severus Snape™ looks pretty scary - when casting spells and otherwise. I wonder how this inscrutable magician has ended up with such a gentle patronus figure as the doe?
Lord Voldemort™, his companion, the witch Bellatrix Lestrange, and Nagini the snake make a fearsome trio. Dressed all in black, the dark lord fixes his enemy and opens his mouth to utter a mean laugh.