Hellbus said: Looks like Koishi cut off Satori's third eye as well as her own, but I have no idea why. Pixiv description doesn't shed any light on it.
I'm guessing Koishi did it cause her eye is closed and she might think she doesn't need it anymore so. -slice- Then figures that she's so happy since her eye was closed living the life that she lives that maybe Satori might be happy to. -slice- Now they can live the same life Koishy lives but when Satori wakes up will she see it like this... or will she see it as her sister just mutilated her, trying to make her the same.