Responses
As far as theories go, if Guwon isn't human, my guess would be that these were the parts of him that got cut off but somehow reattached like Frankenstein for example.
But it could also be a stylistic choice.
My main support for this theory was the SPAKLZ calendar where Teach had that exact tattoo on his finger, it was right at the cliffhanger chapter where he was about to cut it off, that's why.
But we'll see!
Ohhh that's really interesting:o
Speaking of theories... do any of yall have some for his tattooed arm and neck? Im not even sure if it is indeed a tattoo cus i see no one with tattoos in this manhwa