Op here. Thanks for the tip but i don't think it will work. Every Mabatake artwork i have, i got it from his Pixiv and painstakingly from Twitter. Mabatake has the habit of not mentioning who the characters are, so i had to look at replies, translations and other posts for their origin. (Myanimelist helped with that)
I think this one is easy, i know i've seen him before in a game.