He has the same eyes colour like zombie he killed in chapter 3 Whatever
Omgs! Maybe the reason why he doesn’t feel human or zombie is because he was a man made creation! It could explain why there is so much he doesn’t know!! But that’s just a theory (a Yaoi theory)
They seem afraid of him so he probably killed someone in front of them or smth also, for some reason I keep thinking he isn’t entirely human idk why.
On another note, they are so cute together he better keep being a green flag man