brown hair and vivid green eyes, residing on a paradise where kids eat candy for meals and watch cartoons all day. She and Numbuh 1 have a great time in Operation: U.T.O.P.I.A. before the latter finds the loophole in Chester's world, revealing her as an avatar simulation of Chester, her head transformed into Chester's before attacking him. But Nigel activates his J.E.T.A.B.O.O.T.S. and flies away from Katie and her illusions.