Fsty the best thing is just try and move quietly around and no sneaking up on her. My 2 aren't even bothered anymore if we walk up behind them. They really are just like the rest of them. It also might help to hold her a little more often. It is hard to reprimand though LOL...I still find myself telling them no when they get into something. They are pretty well behaved though, so I don't have to many problems. Also deaf ferrets are known to be much more vocal, and loud while being vocal. All mine bottle brush the tails when startled and especially when excited! I also noticed that DS hisses alot more during play than the others do as well. He loves when I get down on hands and knees and play with him, he knows he can hiss at me and get away with it...LOL
Good luck with her, she is a doll!