This is some concept art for the 'Heads you lose' side-story in the Project Future comic. From left to right we have, Erich, Gert and finally Bren.
I'm not honestly sure whether Erich should be taller than the others, but that's the way the line-art was delivered, and I didn't have time to ask since Merlin is 10 hours ahead of me.

Lines by Merlin, colours by me.