Unfortunately, White Knight was mysteriously able to get her to confess, and locked her in a cage to prevent Rex's dissection from being stopped. Later, Dr. Fell was fired by Providence following his attempt to dissect Rex and was soon replaced by Dr. Holiday. Holiday is the polar opposite of Agent Six, as she is much more in-tune with her emotions. Although she can be short-tempered and stubborn at times, she is a deeply caring person. Her stubbornness can also lead to determination. Holiday is also not afraid to speak her mind in front of her superiors, especially when she believes she has a better solution to a problem. She is also a very empathetic person. She's frequently expressed concern over the fact that Providence sees Rex only as a weapon, and not as a sixteen-year-old teenager. She repeatedly tries to convince Six to try to relate with Rex, as she understands what he goes through with his amnesia and the pressure put on him by Providence. Rex frequently flirts with Holiday despite the fact that she is much older than him. While she is widely aware of his crush on her, she mostly ignores him. Later, Rex realizes this fact and stops. Six, on the advice of Rex, later asked her out on a date, which she gladly accepted. Following Six's memory loss, Holiday was a little unnerved by his more aggressive romantic overtures (such as the pick-up lines), though it is confirmed in further episodes that her feelings toward him have remained the same. This is evident in the season three episode, 'Ben 10/Generator Rex : Heroes United,' when she kneels beside Six, who is in a comatose state, and kisses the glass of the chamber he is in.  Holiday also exhibits adequate fighting ability and a strong capability with Providence weapons, evident when she dove in front of gunfire aimed at Rex and Six while fighting E.V.O.s in Abysus. In the episode 'Payback,' Six handed Holiday a Providence gun, to defend herself against the Pack and Van Kleiss. In the Petting Zoo, Holiday is cornered by Skalamander, but being resourceful, she unleashes her sister, Beverly, who chases Skalamander away. Noah Nixon is a human and Rex's best friend. In the beginning it was revealed that he is an agent sent by White Knight to befriend Rex and subtly influence his decisions to make him more compliant. Noah eventually revealed to Rex his status as a covert agent and they became friends on open terms.