Agent U

Agent U (Agent Ultimate)is the very first agent tobe recruited by the O.W.C.A. He is now retired but came back as the super agent when he helped Perry the platypus destroy Dr. Doofenshmirtz's "Absorbing-inator" and accidentally absorbed Agent P's age and became young. However, Perry went out and the age stillis inside Agent U but Perry now has own age. The former owner of Agent U is Lawrence Flynn-Fletcher.