Foil
Character Role Analysis
Toswiah/Evie and Cameron/Anna
These sisters are super different, which is exactly how Cameron/Anna likes it since she doesn't want her little sister acting like her all the time. Toswiah/Evie tells us that Cameron/Anna is brave, while she herself isn't; Cameron/Anna is outgoing and popular, while Toswiah/Evie sticks pretty close to Lulu; Cameron/Anna is outspoken, while Toswiah/Evie is more reflective; Cameron/Anna handles the crisis by searching for a way out (Simon's Rock College), while Toswiah/Evie deals with it by closely examining every detail of what's happened.
In other words, the girls' differences help us see them each more clearly.