This is less of a question on what she can do, and more of one on who she is. I mean, I wonder due to some hints of her backstory (From what Zer0 said, met a Salubri as well as what she's willing to say in TFN).
But my question is basically: Who is Silvia Black and what is her Backstory? Only if it's willing to be answered, if not then please feel free to delete this topic. D: