Lily's gauge was full. She didn't want to use it, yet. She would if she had to. Because Lily knew she could do this, she was doing so well, and the Red Avatar had more health taken from it then Lily herself. She could see that it was trying to bring it's gun up, but Lily moved in smoothly, staying close and preventing that, using her swords and slashing the red's hadns every time it tried to bring the gun up. The thing was stupid, not even trying to move away from her. 

Wanting to end this, Lily went for a neck shot, putting all her force behind the slash