These are my favourite quotes from the both of them:
Luna:
“You’re just as sane as I am.”
“I think I’ll just go down and have some pudding and wait for it all to turn up - it always does in the end.”
“Things we lose have a way of coming back to us in the end. If not always in the ways we expect.”
”I suspect the nargles are behind it.”
Hermione:
”If you two don’t mind, I’m going to bed, before either of you come up with another clever idea to get us killed, or worse, expelled.”
“Are you sure that’s a real spell? Well, it’s not very good, is it?”
“I mean, it’s sort of exciting isn’t it? Braking the rules.”