I personally find the blindness to be poor RP. As far as game mechanics are concerned, it's obvious that the character has no significant handicaps. This isn't some stupid anime/manga where all of the best swordsmen are obviously blind.
And as the saying goes, game mechanics trump RP...
And what's next, a master swordsman who RPs as being armless? Paraplegic?
As the saying goes there is no mechanic to determine blindness. Also, the RP behind it represented a blind person in a sword fight rather well. There was no parrying, there was no blocking, only a blind woman charging and swinging a sword utilizing a set of techniques, and landing a lucky blow.
There is no game mechanic to have a non-regnant king, but that didn't stop you. There's no game mechanic for marriage, that hasn't stopped anyone, including you.
