Carley is a friend of Drake and Josh who is seen throughout the series as someone they know for a long time already. Carley is one of the few people who knows that Drake and Josh are step-brothers and that they live with their parents, Audrey and Walter Nichols, as well as their little sister, Megan.
Carly is a close friend of Drake, Josh and Megan, despite the fact that she is several years older than them, due to her maturity. She is intelligent and kind, and is always willing to help her friends. She is also a talented singer and guitarist. Carly has a great sense of humor, and she is often the one who comes up with the most creative ideas.