He wasn’t expecting she would go for  Avada  to kill him, it somehow never felt right for her. Draco would definitely be the one to choose it, had he ever been strong enough to cast it. It wasn’t as if Hermione wasn't either, he had a feeling she would be actually exceptionally good at this particular spell, yet somehow it didn’t fit her. Maybe because it felt too final, too abrupt? Too... magical? 