I have a feeling that this is what would happen in real life... Like, Harry being really nervous, so he just whips it out. And Draco is all like ''Really? Thats how you propose to someone? Turn around and try again, bitch.''
After you complete a Dutch braid (a reverse French braid) down one side, go in with some dry shampoo and gently pull it apart. This will create a thick-looking braid. And after the ponytail is secure, use your fingers to back-comb the tail slightly