We don't know yet. Beside, one get a black flag when a person psychologically abuses their partner.
So as long as the guy doesn't rape their partner he's a green flag?? He's literally a murderer be so fr. Some of yall don't even know how the real world works do you?? Yall be calling characters who has not sa'ed their partner green flags like girl that is literally the bare minimum.
Thats why I say we don’t know yet. Yeah Guwon is a murderer but his IQ is low, he doesn’t know better expect the current world he’s living because he grew up in this terrible environment(as far we know). Of course no one question him because they thought this is just the world they’re living in now and no one bother to teach him because they either scare of him or believe his strength is necessary to survive
But I guess you forgot that Guwon seen to have mind similar to that of a child. And children can quickly learn their surroundings, be it good or bad.
This isnt real world. That's the whole point. Literally almost no character in any thriller or psychological bl u watch is a real-world good person. The system of "green, yellow, red" flag are determined on how they treat their partners. Not how they treat the ppl around them. The whole "hes nice to only me thing" would make u an orange flag in real-world terms.
The true definition of black flag