Claire Whitacre is in Caste 4, she is 19. She has the power of enhanced speed, but the power wasn't deemed necessarily useful so she is stuck being a foot soldier as a 4. By being in the military she has developed a sarcastic humor and is known for not being too serious. Around important officials, though, her whole persona changes and she can become a person with perfect etiquette in just seconds. She thinks with her heart and always wants to help people.