Jeff

Jeff is most prominently present when Ben is going through the Changing at the beginning of the book, when Teresa arrives, and when Minho, Alby, and Thomas are brought back from the Maze alive, as well as any other medical emergency mentioned.

Jeff was present when Teresa woke up, but she kicked him in the groin, climbed out of the window and met Thomas. Jeff is killed when a greiver pulls him away during the escape.