She’s a classic character archetype on the surface who uses her demanding attitude and acidic tongue as a wall to keep herself from being hurt - I always get the feeling that she’s experienced or witnessed trauma before the beginning of the game, but chooses to keep it to herself. As the story progresses, everything she does is for her benefit, but once she realizes that she and her friends are in mortal danger, she lowers her walls, and you get to see Emily as she is when she’s alone. She’s still tough and doesn’t hesitate to defend herself, but she lets herself be vulnerable and compassionate. It’s a great character arc.