Kiku Wong (born February 21, 1994)
is a 5-year-old Japanese-American girl. Little Bill would say she is the nicest of his friends, if somewhat eccentric. Kiku is kind to everybody and always fair. In fact, her ability to remember the rules of the games they play has saved many a friendship. Kiku wants to be president when she grows up, so her mediating skills will come in handy. She is voiced by Eunice Cho
It is revealed in "Picture Day" that Kiku doesn't like cheese.
In the episode “Miss. Murray’s Wedding” she was the Flower Girl and Little Bill was the ring bearer.