I am very satisfied with this ending. The only thing is that I wish it were longer, because it is one of the most fun mangos I have ever read. Technically could have had one more mini-arc, but the thing mentioned had zero information except the fact that it happened behind the scenes, so it didn't. It's difficult to find manga of this level of quality with an ending as fitting as this one has, even when the ending is appropriate. I was a tad worried the ending wouldn't be good, but that's based on it's not uncommon for any type of high or mid quality manga to have one that's average at best. Thankfully, my worries were very wrong. Honestly, the conclusion was much later than I expected, I thought it was going to end with the first half of the decisive battle. I'm half-surprised she didn't get a scolding for meddling in human affairs before she actually did, but that's part of the joke I suppose. Kind of made me facepalm that he was done-in the same way Shion did in the beginning. I guess that gag couldn't be left out. That, and the author probably couldn't resist putting it in again.
Naked knee socks fetish would save the world? Who would have known?