Responses
If the title serves me right, I think he's from hell. Sisyphus was a king in Greek mythology who tried to cheat death and got sent to hell, his punishment was rolling a massive rock up a hill (probably why 1 he's super jacked 2 really loves the hilltop and lives there) but the rock would roll down and he'd have to start again. He could be something like an undead and have forgotten anything that isn't the boulder and the hill, Sisyphus was a terrible dude in the myths he's in and he also escapes death multiple times.
what kind of creature is guwon? cause he sure is not human. he doesn't seems like he was born from a human or had human memories