What if hwashim is actually kangjin or some sort of his soul is inside hwashim. Since the author doesn't really explain what's Gaia Shadow is. Maybe kangjin went to the black portal to sacrifice himself then his soul get reincarnated inside hwashim. I know it sounds weird but the way the other S-class and the higher up believe he's chaeyeon soo (or someone with the same strength) kinda telling something. When Yeonsoo himself believe he's just C-class.
What if hwashim is actually kangjin or some sort of his soul is inside hwashim. Since the author doesn't really explain what's Gaia Shadow is. Maybe kangjin went to the black portal to sacrifice himself then his soul get reincarnated inside hwashim. I know it sounds weird but the way the other S-class and the higher up believe he's chaeyeon soo (or someone with the same strength) kinda telling something. When Yeonsoo himself believe he's just C-class.