Hey Conan. It's about time for me to make some new backgrounds. I think I showed you before what I did with Riho and Kanon--these will probably be pretty similar, but for Meimi and (other) Kanon. Would you like one to use here, or just stick with the current one for the time being?
OK, I finally got around to this. I made enough for the wikis I admin + 1, but I didn't have specific ones in mind for each--so I'll let you pick one, and then decide where to put the others.
Here are the images. This time since they've both been in H!P about 5 years and I had 5 images to make, I more or less picked a picture of each from each year.
When you upload one of these in Theme Designer, I recommend unchecking Tile and checking Fix. It's not perfect since it matters on things like people's resolutions and other settings, but ideally this makes enough of Zukki show on the left side of the content area and enough of Meimei on the right.