The Initiate.

A Divergent fanfic from Four's younger sister 'Sonia Eaton' POV.
It is the aptitude test, Sonia is one of many 16 year olds taking the test to see where she belongs. She will eventually learn she isn't like most people and that she must keep it to herself. Her world around her slowly crumbling as she realises that people like her are being hunted and killed, she also has to contend with her older brother who abandoned her and the feelings she has for the boy who is from a rival faction but can she trust him? In a world that fears her kind.
(The Divergent series and some of the characters in this story belongs to Veronica Roth. I own no rights)