Zaira

 Zaira Fortuna
 Zaira is a young lady suffering from subcapsular cataract. She's Shirois cousin. Fortuna is her second name.

 She spent most of her life in a small village, where everyone knew everyone, so when her parents suddenly decided to move to a city, she wasn't sure she'll be able to do it. She sticked to Shiroi, but Shiroi never was too nice towards her younger, almost blind cousine. Shiroi is a free soul and taking care of dependent Zaira was more of a chore. At school she found friends, who helped her and she didn't have to worry she's too much of a problem. Letty and Kana soon became her best friends.