Edit | Respond

Among the KA list Karino, Mukouda and Mitani were listed at the top (in that order). Mitani said he vaguely remembered Karino drew this, and other sakubuta said it was indeed Karino.

https://twitter.com/clarinht/status/1129336683701260288

Genga (sadly there's no name credited):
https://twitter.com/lovetomino/status/1128894083601031168