OH
I think chn would dress like one of the gag comedian kind of outfits? he would also willingly agree to whatever silly thing if you convince him it'll be hilarious (even if it's a bit of cringe and at his expense). like!! dressing as the mushroom monster from maplestory or an npc from some game or the lettuce guy from atla.

for hoon? hmmm either he lost a bet to wear something shameful (in his opinion) or he's dressing basic??? like a typical general murderer or a guy with a shovel. zombie baseball guy. or he cosplays instead.

IF we're going couple Halloween outfits... it'll probably be chn's idea... and it'll be something ridiculous like catdog cartoon or the a witch and their animal familiar (hoon is the familiar animal). something like that. a pair but like not a cheesy romantic pair. just something they can be a pair of together. OR COSPLAYING A PAIR TOGETHER but like. the side character ship because who wants to be what everyone else is definitely going to be!