*She first appeared in "Operation: C.O.U.C.H.", where she is featured as the anchorwoman for the KND Nightly News. After her colleague made a bad joke about the Common Cold, she introduced the list of kids turning 13 that day. It was implied that Numbuh 2 might have a crush on her.

In "Operation: H.O.L.I.D.A.Y.", she attended the Kids Next Door Senior Command Super Relaxing Retreat and Ice Cream Social, along with every other sector leader. It is there when she learns that she and Nigel were maternal cousins. Numbuh 10 also befriends Lizzie after she flew to Jamaica because of a misunderstanding (Lizzie believed that Nigel was cheating on her with 10). They end up talking about a number of embarrassing facts about Numbuh 1, much to his chagrin. In Operation: H.O.L.I.D.A.Y., she wears a red top, a blue sarong with white flower designs, white flip flops with red straps, and white pearl earrings and wears her orange hair long.

She is also seen in the audience in Operation: I.T., cheering on the newly appointed supreme leader Father, after he pledged to help them eradicate broccoli. She sat next to Numbuh 16, and close to Numbuh 83, Numbuh 84, Numbuh 168, and Numbuh 888.

In Operation: T.R.E.A.T.Y., she was present on the KND Gihugeacarrier for the signing of the Kid-Teen Treaty. When the teens betrayed the kids and started playing incredibly loud music, all of the KND operatives present was immobilized, including Numbuh 10. After Numbuh 1 and Chad stopped stopped the loud music, Numbuh 10 presumably joined in the fight against the teens until the Gihugeacarrier blew up.*