I Actually Love How Kōyō's Right Eye Is Specifically Covered And Not Her Left Because The Right Eye

I actually love how Kōyō's right eye is specifically covered and not her left because the right eye is mostly believed to be "good" or to represent "Heaven." While the left eye is to represent the "devil" or "hell." This is again connected to connected to Kōyō's beliefs on the world itself. When we see the panel of when Kōyō was much younger, she had both eyes visible, but in present timeline and overall after the death of the older man she attempted to escape with, her right eye is covered. This is actually to show how Kōyō can't see anything but darkness now. She has covered the good part of herself and has accepted the darkness and cruelty of the mafia. She had both eyes present when she was younger because she had the chance of being in the light. But now, that chance is gone, and she is stuck in the dark, refusing to come out. We can also see that she almost always has her right hand covered, again, symbolising how she has become the darkness in a way. The right hand is considered holy, and the fact that she often covers it is such an interesting detail.

This also greatly reforms there whole "siblings -in -everything but- not -blood" as currently chuuya is walking the same path as kōyō did once just in a different way, chuuya's path started out different from kōyō but I can see him covering his right eye again if he becomes the next pm boss . The same path different shoes.

Similarly chuuya also is sporting a similar hair style by covering his right eye or the "good" , "heavenly" because he refuses to believe in the good of the people after the deaths of the flags of his friends 

This also makes chuuya seem more similar to verlaine as he is literally having the same hairstyle as him , showing his possible sway to his older brothers words and actions