Plaid Shirt Woman

This woman had one appearance, on the train near the beginning of the movie. She sat next to Julie on the train, and noticed Stuart when he had dropped his phone and Julie was going back to her seat.

She wears a plaid shirt, and the conductor called her "sir". When she tells Julie about it, she notes that that answered her concerns about said shirt.

She also "has a friend" who would like to do bad things to Stuart Bale.