A damn shame there’s so little on this guy. Wish more can be found. Sucks that some artists just completely wipe all of their existed from online.
@MokouInferno There are some other artworks that can be found archived under the artist's Deviantart domain in Web Archive, 66 hits to be exact, although not all URLs are images, and in turn not all posts that are images work (the image was somehow not saved, but the page and commentary were)
This is an example of an URL from that list that works (the image was saved) While this is a hit where the image is not there, but the page and commentary were saved
Now, it seems only a small part of this artist's works survive, yet not all may be 'worth' for Danbooru's modern standards as I see it (this would be one archived example)
If you are curious, I originally found this picture from a 3rd party reposter in Twitter
Also did a quick search in Google with "michiharuruko" (include the quotation marks) and found 1 hit in Sankaku Complex and some other results from Reddit. Not much, but the thread can be pulled if anyone is willing to spend some time and save more stuff
It seems the artist wiped out even before AI was a thing, as I have seen snapshots in Web Archive from November 2020 and those were already 404 error
No idea about the name or copyright of the two characters in the poster between Minoriko and Sakuya & Remilia's posters. Tried to find the socials of the illustrator of the 东方LiveParty poster, 白野威 but had no luck.