OOOH THIS IS SUCH A FUN QUESTION lemme think about this. i’m gonna go with the simplest answers that fit in my head
jiwoong - vampire
hanbin - warlock or cat shifter
matthew - gumiho or werewolf
taerae - this one is hard for me but i’d say maybe siren or merman
gunwook - aasimar (allow me to get a little d&d in here lol) or dragonborn