So far I did the pulls after 1 (or more) bronze in a pull, 3 times in a row. Did not account to much.
Maybe its 3 bronzes In a single pull ? Or 3 bronzes in 3 consecutive pulls (which is almost impossible, like 1 out of XXX).

Yes she does, and its very adorable. Personally I tend to think about her as being blind. Feels much more in setting of her character and does remind of Lilli from Katawa Shoujo VN (even her demeanor and posed calm manner of speech fits that bill), so doesnt really bother me much.