This was terribly sad! I think a parents worst nightmare. But writing Luna from a child to an adult, made things even sader. You made her angry at her father for betraying Harry and for what she was going through in order to help him, but her father was only doing what he thought right so it really was a no-win situation.
It was upsetting that her anger lasted so long, that she shattered everything they had by not believing anymore. Although, perhaps it was just her way of coming into her own.
The end was just....gut wrenching. In a way, you made what he belived come true after all. Perhaps Heaven is his Montraipsie and he just doesn't know it. Either way, very touching and brilliantly written. You never fail to amaze me :)