Since I'm old and jaded its been a very long time since I actually screamed and pumped my fist in the air at something that's happening in a book.
Firefight broke that years long standing truth with a single short sentance:
"Megan had arrived."
That single sentance is a culmination of so much in the Steelheart universe.
She is the one that David's father knew would come.
She is the one the Faithfull are waiting for.
And she pulled a "Big damnation hero" entrance.