This image's style is so bizarre, I feel like there's some kind of appropriate tag for it, even though I've only seen a few others like it before (though not on Danbooru). o.o; Any ideas... ?
It's clearly related to post #10671 but I don't know the artist, and though they're very closely related, I don't really think a parent child relationship are appropriate, since they don't have any progression from one to the other.
Then again, I'm not that familiar with the application of parent and child posts.
If we knew who the artist was, I feel that would be enough of a link between the images. Although I agree that linking it through a comment is probably the best way.
As for the tag, aesthetic tags (cute, creepy, artistic etc.) are really troublesome I guess. Perhaps we need to make a few pools that are public for this kinda purpose. "Public pool of creepy images" or something.