Abigail Lincoln

"Well, this girl is the last KND member I'm meeting now, and that's Abigail Lincoln. Named after Abraham Lincoln... and Lincoln Loud. Call her 'Lil' Abby,' I bet she would tried to our best to not only to protect kids like her... but also the friendly adults that they trust the KND... like me... if I were there."

--Su Ji-Hoon, Operation: D.O.O.M.S.D.A.Y.

Abigail "Abby" (Gilligan) Lincoln aka Numbuh 5 is the intelligent, relaxed girl second-in-command/spy in Sector V. She became a KND operative three years before the show started as shown in a Kids Next Door episode, "Operation: M.A.U.R.I.C.E.." She was trained by her older sister, Cree (Numbuh 11), and joined her sister, Numbuhs 8a and 8b, and Numbuh 9 in Sector V.

After Cree betrayed and was defected from the KND, Numbuh 5 became the leader of Sector V, until she allowed Numbuh 1 to take over after she found and hacked his grades for his KND Entrance Exam. She is the oldest member of Sector V. Numbuh 5 later became Supreme Leader after Numbuh 362 retired.

In When the Cold Breeze Blows Away, she is a spy and co-leader of the Kids Next Door.