No, Guwon does not kill "for no reason"
All his confirmed kills have a just cause to him.
1st kill were the maggots in/near his town
2nd the kid's dad stole medicine, broke the law
3rd Doc pointing a gun at him/trying to kill him when he thinks he didn't do anything wrong
I can see your point that Guwon feels justified in his choices to kill.
I believe he also killed the drs family and mcs dad, but since you suggest they are unconfirmed, we'll leave the reasons for those killings out. (It checks out for his character that he probably did but nvm)
But what was his reason to kill mc before finding out he was useful? He was dying on the floor, a threat to no one. What justification did Guwon have for that?
Urgh, yeah, re- reading the first couple.of.chapters is so sad now.
Sp9ilefs for the latest chapter below I guess
In the first version of Guwon coming up behind someone and killing them, i think mc's mixed it up with how he got injured in the first place. So the figure is just a shape really and talking about robbing him, but then when he's hit, he's wearing the dads clothes from the later chapter...
The bit in the truck after he's given him water and Guwon says ' someone was thirsty' that's probably the water his dad brought to him... got me so sad...
The bit with Guwon saying 'i almost killed you for.no reason' isn't he killing everyone for no reason? Also, how does this zombie thing work... are the people Guwon kills not coming back? Or is he killing so many to make the problem worse on purpose?
Also had a random theory that Guwon might be connected to the first suicide/zombie occurrence.