I like to think as! Mob would just wear anything that’s comfortable just like his canon self, something plain and cheap. although in my hc’s he wears whatever reigen or ritsu suggest to him. He wears a white dress shirt with a tie because ritsu said it was more presentable, he wears a long black trench coat because Reigen said one time that he looked cool in it etc etc. we’ve already seen how he is with clothes (specifically that shirt he wore when shopping with teru lol) he has horrible fashion sense, so I’d like to think he would wear some ugly ass shirts or pants he found in his closet and have absolutely no shame walking out in them. Reigen would have to immediately take him shopping so they can at least find some decent looking clothes for him that aren’t for work. I like the turtle necks and trench coats people draw him in 😋 it suits him so well, although I do wish we can see more color variations in his clothes. I might draw him in different colored outfits one day… ✍️