Summary SCREENRANT VIDEO OF THE DAY SCROLL TO CONTINUE WITH CONTENT Warning: This article contains spoilers for episodes 1-3 of The Walking Dead: The Ones Who Live.
Thorne may be Rick's ally, but the bigger picture that she refers to means she won't let anyone get in the way of her goals. Thorne's motivation behind nearly shooting Michonne simply came from her commitment to her mission. She hadn't fully trusted her from the start, having her knife at the ready while briefing Michonne in case anything went wrong. Unlike Okafor, Thorne isn't willing to take the chance on someone she doesn't fully trust, and shooting Michonne during the chaos of her mission would have been a simple way to get rid of her.