For years, he acted as a true Abnegation, always ready to serve others when need be. Unbeknownst to his family at the time, Caleb is deeply inquisitive inside and fond of reading books; he is characteristically an Erudite.
This secret persona is ultimately revealed on the day of his Choosing Ceremony, where he chooses Erudite as his faction. Before the Choosing Ceremon, Caleb subtly hints to his sister, Beatrice, that she has the option to transfer if she is having the same conflicting feelings as him. On the day of choosing, he and Beatrice chose to abandon their family for different factions. He then becomes an Erudite.
Later, he is visited by Tris at the Erudite compound who was instructed by their mother to investigate the simulation serum that Jeanine has been designing. He defends Erudite, but is disappointed that Natalie visited Tris and not him, where in Tris reveals the Abnegation have been banned from the Erudite compound and Caleb is shocked.
Caleb leaves Erudite initiation after discovering the Erudite's plans with the serum. He is later seen in the room where the surviving Abnegation members were hiding, their father and Susan Black being amongst them. He and Andrew lecture Tris for shooting Peter. He is told by Tris to stay below with Peter while she and Andrew climb to the top of the Pire to protect him. They later escape together aboard the Dauntless train.
He arrives at the Amity compound with the others aboard the Dauntless train. When the Erudite and Dauntless arrive, he is among those who successfully escape and meet the factionless group on the train. They are brought to the Factionless sector of the city before he goes to the Abnegation with Susan. After the attack of the Dauntless traitors on Candor, he arrives at the Candor compound with Marcus. Tris later teases him with Susan, who he has apparently been flirting with during the Abnegation years. He later leaves again, supposedly for the Abnegation.
When Tris surrenders herself to the Erudite for testing to protect the Dauntless, it is revealed that he has been working for Erudite all along and has leaked information to Jeanine about Tris's aptitude test results. When Evelyn's group and Marcus' group invade the Erudite headquarters, separately, Caleb catches Marcus' group in the control room and tries to stop them, but is knocked out by Marcus. Tris reluctantly left the scene, continuing the mission.
In Allegiant, Caleb is trialed for siding with the Erudite and is put up for execution. Tobias comes into Caleb's cell on the night that they go outside the fence, fooling him into thinking that his execution has been moved to that night. Caleb is shocked and hits Tobias in the legs with a chair, slowing him down and starting a chase. That night, they (Caleb, Tobias, Tris, Christina and others) go outside the fence, and Caleb is one of the people who witnessed Tori's death. Caleb and the others then meet Zoe and Amar, Tobias' initation instructor who supposedly died, outside the fence and they take them into what was known as the O'Hare Airport. Caleb, Tris and others then learn about the Factions and that Divergent people are known as normal people, who pose a threat to the function of the factional society of Chicago. They also meet David.
Main article: Susan Black
Caleb and Susan was seem to talk to each other often. When you first meet Susan in Divergent, she and Caleb are exchanging flirtly looks with each other.
Beatrice 'Tris' PriorEdit
Main article: Tris Prior
Tris is Caleb's younger sister. They are a few months apart in age, so they took their apptitude tests in the same year. At the choosing ceremony, both Caleb and Tris choose a differnet faction from Abnegation, Caleb choosing Erudite and Tris choosing Dauntless.
Physical AppearanceEditCaleb Prior has dark hair, a hooked nose with green eyes. He has dimpled cheeks. Tris says that if he wasn't Abnegation, the girls at school would like him. It is mentioned that when he was younger his features did not fit him, but as he grew older Caleb grew into his features.
- He is the only Prior family member left alive.