i cant help but think of sohyoon of that first antagonist in dod and practice monster as t...

OMG STAPHT LOL. Hoyoon is probably similar in nature though he's definitely more sensitive and has a bigger sense of empathy after character development than Cheongryeo. For Jiwon, I suppose maybe a twisted/jaded version of that MC. In addition, just like how the ML of that story cannot get a read on the MC (leading to lots of misunderstandings), Hoyoon also has a tough time understanding Jiwon's thoughts and seeing past his diamond defenses.