The Watanabe family is a family from the. Kimi's father, Hiro, is a member of it, as well as their extended family. The Watanabe name is the last name of:
Kimi Finster (1991): Hiro's and Kira's daughter, Wanda's step-daughter, and Kiki's Half-Sister. She became Chas Finster's adoptive daughter, and Chuckie's sister.
Kira Finster: Hiro's ex-wife, and Kimi's mother. She married Chas after her divorce with Hiro, and adopted her husband's son, Chuckie.
Hiro Watanabe: Hiro is Kimi's and Kiki's father, Kira's ex-husband, and the husband of Wanda.
Wanda Yoshida-Watanabe: Wanda is Hiro's second wife, the mother of Kiki, and Kimi's step-mother.
Kiki Watanabe: Kimi's Half-Sister, and Hiro's and Wanda's daughter.