Cia is from Five Lakes colony, and she is teamed up with Tomas who is also from five lakes. Instead of bringing things that remind her of home and nice outfits, she wore comfy clothes and brought a pocket knife and transcript communicator. She has saved Tomas's life twice, doesn't want to kill anyone, and trusted Will when she shouldn't have. She hurt her arm from a monster attacking her. Cia is very smart because she passed the testing and recorded herself talking about the test so she won't forget after her memory is wiped. At the beginning of the story, she thought of herself as a smart girl who is kind and trusting. At the end, she doesn't quite know who she is anymore.
Tomas is a candidate from the Five Lakes colony, and is in love with Cia. Cia says that he is handsome and has he grey eyes. He was suspicious with Will from the start of phase 4. He saved Cia when she was about to fall into contaminated water off of a bridge. He got hurt from an oasis explosion, and also got shot in the abdomen by Will. He killed Zandri and didn't tell Cia and took her identification. He changed during the book because at the beginning of the book, he thought that Will was a nice and funny person, but as the book went on he became or and more suspicious of him.
Will is a testing candidate from Madison colony. He has a twin named Gill who was sent home after the first test. When his brother and him met Cia and Tomas, they were both very nice and funny. Once Will's brother was sent home, he decided that he would win for what ever it took. He told Cia and Tomas that he would help them, and Cia said yes ans trusted him while Tomas was suspicious. At the end of on of the test, he betrayed them and shot Tomas to try and kill him and ran off.
Ryme is a tall girl from Dixon Colony with long blond hair, and broad shoulders. When Cia first met her she seemed nice and shy but really she wanted to tried to kill Cia with corn cakes that she poisoned. After one of the test, she was extremely rude to Cia and they got in a fight. Later during dinner, she hung herself due to the pressure of the test, and her fight with Cia. She changed because at the beginning she thought that the testing would be easy for her, and Cia would be an easy target. Later, she realizes that the testing is extremely hard and Cia is smarter than she seems.
Zandri is a beautiful, artistic girl from Five Lakes Colony. At the beginning of the book, she is a confident person and was flirting with Tomas on the train. She made it to the fourth phase of the testing and then when Cia left Will and Tomas alone without her, Tomas killed her and took her identification bracelet.
Zeen is Cia older brother, who is very very smart. He is tall and has blond hair. He wanted to go to the university, but sadly didn't make it to the testing. He went from being mad and frustrated when he found out that Cia made it into the testing, but became proud of her achievements at the end of the book.