Sound and fury
Ron reminds her of Macbeth. Not Macbeth himself, certainly. Perhaps not even the play, specifically. Just the one line – sound and fury. Ron is Sound and Fury, personified. She sometimes probes him, tries to upset him because his anger is something to behold. He is even more intense when he's angry. His hair is brighter, his eyes are bluer. His voice deepens. And the way he looks at her…
Really, Ron is every Shakespearean hero, ten times more perfect. Crazier than Macbeth, better at moping than Romeo, more determined than Hamlet. Ron isn't the sort of person that can be captured in the pages of a play. You don't truly know Ron until you've stood by his side and watched him fight for Harry. Fight for your own life. Ron is perfect.