she can be implanted with her left ear. But I think she can be implanted her right deaf ear too since she heard sounds with her left ear. The only way to find out is go to a doctor. if she is losing her hearing over time, it will probably get worst so I wouldn't be afraid to implant it. In fact, severe loss is just as bad as profound in my opinion.
and I highly suggest that you two take Sign Language class together. You'll be glad you did.
