I haven't read all of _Harry and Kiki_. Several novels worth in and it's just getting started! I don't think I will review it for content for a few more novels worth, either.
The amazing thing about this story is that it is well over a million words. All seven Harry Potter books together are in the range of 1,084,000 as best as I can tell. Throw in _Tales of Beedle the Bard_ and you have something approximating the size of this one work of fan fiction.
It is a monument to dedication to get this far, and inspiration to me -- you have plugged away at the same universe without giving up on it, and you keep fiddling with it enough that it remains recently updated. And the important thing to me is that you don't feel like you are _finished_. You have an ongoing story and keep finding more story to tell. I'll probably never catch up, but your story shows it _is_ possible, and one day I, too, could look back and say "Holy crap! I've written a million words in this things, how did that happen?"
Best wishes for your next million words. :)