Only appearance: Operation: S.C.I.E.N.C.E. Numbuh 21 is the leader of Sector K and was on the big 2x4 Technology Fair with Numbuh 23 and Numbuh 22 (Numbuh 20 had been grounded). She has blonde hair and wears an orange shirt.
Only appearance: Operation: S.C.I.E.N.C.E. Numbuh 21 is the leader of Sector K and was on the big 2x4 Technology Fair with Numbuh 23 and Numbuh 22 (Numbuh 20 had been grounded). She has blonde hair and wears an orange shirt.