Oh, this is lovely :D I have a real soft spot for Percy gen, and I love Tonks, so the header alone made me squee one hell of a lot.
From the start: I loved Percy and his paperclips, and especially the good weather since the war ended. It was so seductive, this little marvel of Muggle engineering. :D :D I so want to write Percy/stationery now.
I loved your Kingsley, and this bit made me decidedly sniffly: "She was my partner. I trusted her with my life and I know she felt the same. I will use every resource at my disposal to help her… including you."
Alive!Tonks made me extremely happy, too, and while I can't help but feel very sorry for the poor house-elves, I think you did a great job of fixing JKR's mistake when she forgot to mention at the end that Tonks was all right really :) Seriously, though, this is a great way of resurrecting Tonks, and I love it.