Mushi Sanban, also known as Numbuh 469,470

Mushi Sanban A.K.A. Numbuh 469,470, is a five year old Kindergardener, who is the younger sister of Numbuh 3 and daughter of Kani and Genki Sanban. Like her sister, Mushi is very childish and overly happy, but beneath her outward personality is a very sinister and conniving personality, despite her age. She also looks like the younger version of her sister, albeit with a different hairstyle.She first appeared in Operation: S.P.A.C.E., in which her sister brings her along on a deep-space resupply mission, much to the chargin of the other members of Sector V. When Cree makes a surprise attack on her sister while the other operatives are away, Mushi makes a heartfelt speech which convinces the two sisters to stop fighting, only for Abby to eject Cree into the garbage chute immediately afterward. She turns 6 and becomes Numbuh 469,470 in the season 9 episode: Operation: D.E.C.O.M.M.I.S.O.N.E.D. (Departing Eradication Can Overwhelm Most Members Indicating Short Sacrifices In Order-to Negate Eternal Destruction).