You may be able to pair this chick up with another gentle bird that could be her life companion, but I would not keep a blind chicken in a flock with multiple birds.
Your other chicks may continue to me nice or they may, as they sexually mature, start pecking her, and it could go bad quickly because she can't escape or read other birds body language. Chickens convey many messages by posturing, and body language, and a blind bird cannot see them or react to...
I've dealt with older birds going blind, but never a blind chick. I would plan to keep her confined, maybe next to the flock, but not with the flock so it doesn't get pecked. Generally after about 8 weeks I would watch how it goes.