Oh my, this is wonderfully written. I think you've captured Luna's narrative voice perfectly and it's lovely to see Hermione through her eyes as somebody so strong and unique: All she ever really saw was glimpses of wild hair and a set mouth as they both dodged and cursed and survived, but when she looks back she sees something fierce and gorgeous and powerful. I love the way that you've hinted at more-than-PG-ness with the sensual use of language but it's something one infers rather than being explicit. Their separation is so sad & so believable given, as you say, the dull inevitability of Hermione/Ron, but I like to think that Hermione & Luna have some kind of intimate future together nonetheless. A really lovely fic :-D