Realization – Hermione/Ron. Luna's POV.
For being very clever, thought Luna, Hermione lacked common sense a lot of time, failing to see what was right in front of her eyes. Or more, appropriately, who was right in front of her eyes. She didn't know why they didn't get together sooner, and after talking to her father, she had figured it out. Putting it down to a case of nargles, she shared her theory with Neville, who agreed. From her point of view, they had been in love all along, no one could miss it. it really did help when she said 'I told you so' on their wedding day though…