Whitney is the Morrison's second-in-command and a main character of the Enemy series. She befriends Maxie and is in charge of the younger kids. However, it is later revealed that she has more control than Blue does.
Whitney is described as having a no nonsense attitude such as when she was negotiating with the Waitrose kids and Jester. However it is revealed that she is rather protective of those she cares about such as Blue and later Maxie. She takes charge of the little kids and is revealed to have more control over the Morrisons than Blue does, showing her leadership skills.
Her protective nature is shown one more during The End when she prevents Paddie from participating in the final battle.
During The End; Man U (a lieutenant in Saint George's army) kills Whitney by throwing a sharpened metal bar into her back. She dies either immediately or very soon after being impaled.