Mikuru Sakuta is a Young Rich 18 year old girl from the series (Blind of the Carboniferous) who suffers a rare disease that cannot eveolve anymore but cannot even be cured while the disease is permanently inside of her. She is known to be one oh Kouta's friends which she didn't meet for 3 years due to moving away, and met again when Mikuru was found with her eyes bleeding near the grass wearing a blindfold, She wears it almost all the time because the symptom for the disease as the eyes contact light, her eyes will be in extreme pain after lots hours of light contact as painful as a Sting of a bark scorpion and in rare cases, it will be bleeding, She regenerates her blood while being blindfolded, She isn't as sad if she goes blind, She also ages 50% than the normal which means she can be