Here is a closeup so you can see which one is Magnus. (The guy to the right with the makeshift cogwheel pin made out of bikeparts.)
Also: What does Magnus Holm do at Rain? He makes the levels, heads playtesting and does some diverse writing and game design.
He is also a pirate, a gentleman and a mad steampunk doctor… That is to say: He is a Cosplayer. With swagger.