Halloween // costume ideas?? couple (m+f) and third wheel (f)

one of our friends is hosting a costume party and everyone has to be in a duo or a trio. we have literally zero ideas and needs help. most ideas i get from the internet do not work cuz i have short hair for a girl (like my hair doesn't pass my ears). we really want it to be funny and niche cuz the party is full of people we kinda don't like but we have to go for our friend so the weirder the better so people dont talk to us.....