*Cree Lincoln is the older sister of Abigail Lincoln. She is the leader of the Teen Ninjas in service of Father. Cree was formerly a KND operative under the codename of Numbuh 11 in Sector V before she turned 13, at which point she escaped decommissioning and defected to the side of evil. It was from Cree that Numbuh 5 learned many of her fighting skills and abilities, but the two are now arch-enemies.

Cree was the mastermind behind such plans as crashing the Kids Next Door Moonbase into the sun (a plan she gave up after hearing from Chad that he had already tried it in Operation: E.N.D.), and giving all children the chicken pox while the other teens watched it from the safety of the Pep Rally at her school in Operation: M.A.U.R.I.C.E..

Cree was once a very loyal operative to the KND, and very caring toward her sister. After becoming a teenager, she abandoned all her feelings toward her organization and became one of their worst enemies. She has only slight care for her sister, but is still Abby's greatest enemy. Cree has a crush on Maurice like many other female operatives.*