I don't know which side Vida would go for. She would probably resist both sides and have to be forced to join one. Her main goal right now and to try and live has normally as possible. If either side came up to her and started talking about powers she would have two reactions. 1. She doesn't handle strangers/adults every well or stressful situations. So she would bolt. 2. She would deny it, even after it was proven she had powers, and try to run away. 

For her to decide which side one would have to a tempt to befriend her or like I said before, force her to join.