Emerald is a green cat owned by Kryslie Winchester. She is an everyday cat that does ordinary things. But she has a secret, a secret that should never be revealed. She lives a secret agent for the French O.W.C.A. System. She then later is transferred to Danville , then became one of Dr.Doofenshmirtz' nemisis. She and Perry are partners. Has a trained skill of Kung-Fu , and Street Fighting styles.