Ah, he doesnt really tell his name in this game ^^;; but here is some ''spoilers'' :
-ıts actually not first time MC would encounter him and you can actually fid this out from coffeedripstudios' old games, he definitely show himself in one certain game ^^
-this is also the reaosn why he doesnt really introduce himself because mc is apparently ''cant remember him'' and Jonas is aware of it so he is waiting for MC to figure it out themselves even tho he actually wants mc to already remember him and openly says it in one of simon's bad ends like: ''I wish you could remember me already''