And second comment, Ooh, author, I love it! :) Even though in my personal canon Tonks is gay, you may single-handed have persuaded me to ship Percy/Tonks. Now that's talent!
And they were very themselves, and even when Percy was scandalising Tonks with the fantastic line "Oh bollocks to the damn book", he STILL was Percy. I don't know how you did it, but I could hear Percy SAYING it in my head!