"un" is a type of mushi that lives in the ear and eats the sound, causing deafness. "yami manako", or "eye-darkness", is a mushi that inhabits your eyes and engulfs the light, causing blindness."fuda no umi" stands for mushi, inhabiting books and scrolls. "leasure skin" is for pleasure. "daily skin" is for daily needs. "cosplay skin" is a self-note. "dust collectors" are for everything else.