Well, regardless if whether he can or not (and Gallagher isn't actually much good at attacking with the Force, I should remind people- that is NOT the Acolyte's schtick), that's getting into a fight. It's going to take more than 'fight her' to get out of this one.
Your objective is to get all of you onto that train and out. You need a sensible and comprehensive plan to do that ASAP. Aquila is going to attack so forget about talking your way through.