Kuki Sanban a.k.a. Numbuh 3 is a happy-go-lucky, 10-year-old 4th-grade Japanese-American girl who is in charge of Diversionary Tactics and is the Medical Specialist of Sector V. She also takes care of the hamsters that power the treehouse. She is the youngest operative, and one of the two female members (alongside Numbuh 5) and the only Asian-American in her sector. She loves Rainbow Monkeys, which she collects, fantasizes about, and has extensive knowledge about.