Amy kept the director protected while fighting off the mob of zombies and superpowered humans. The battle was a tough one for her because she lacked the energy to do anything and she couldn't make much use of her physical prowess either.
She wished her brother was here at the moment to fight them, to kill them. She could do all the defending, she just needed someone to pull the trigger.
If not her brother, her dad could come to help too. Alas, she couldn't communicate with them at the moment. Even if she could, it would take a while for them to appear.
By that, it would all be over.
The main issue here was that she was keeping the Life Nova contained. She didn't know what his powers were so if he went out, he could create a lot of trouble.
Amy simply flicked away the plasma bullets, not even giving it a second glance. Not a single thing any of them could do there could hurt her.