Inari

is the son of Tsunami, the grandson of Tazuna, and was the adopted son of Kaiza before his death.

Background
Inari's father died before he got to know him, but he came to see Kaiza as a father figure. Kaiza took a fatherly role in Inari's life and even became close to Tsunami. When Gatō put Kaiza to death, Inari changed. He became a sad and angry boy, with little hope or optimism. He blamed Kaiza for what had happened, believing that he, in dying, had broken his promise to protect the land.

Land of Waves arc
Inari's outlook is changed after he meets Naruto Uzumaki, who also had a horrible past, but learned to deal with it. Naruto's unwillingness to quit and concern for others helped Inari to realize the power of will over fate, and that no risk is too great to protect something precious. He therefore grabbed his crossbow and rallied the townspeople, who proceeded to rise up against Gatō's men. He also attempted to save his mother from the thugs, who would have killed him, had it not been for Naruto. Along with Naruto and Kakashi Hatake, they were able to drive away Gatō's thugs.

Five Kage Summit arc
Tazuna and Inari (now in his pre-teens and has since become his grandfather's apprentice), have both come to Konoha, having been hired as carpenters to help with the rebuilding of the village. Inari was happy to see Naruto and Sakura again, commenting on Sakura's appearance, calling her beautiful.

Inari and his grandfather also ask after about Sasuke, wanting to say hello to him too. Both of them having not yet been made aware of Sasuke's defection 2-3 years prior, and did not realize that it is a very touchy subject for both Naruto and Sakura. Seeing Sakura's reactions, Naruto covers for it by telling Inari and Tazuna (without important details), that he and Sasuke had simply had a fight and that Sasuke was not in the village currently, but that he would soon be bringing Sasuke back. Satisfied, Inari and Tazuna later left to get back to work.

Trivia

 * Inari is the Japanese kami (god) of fertility, rice, agriculture, foxes, industry, and worldly success in the Religion of Shinto. Inari is represented as male, female, or androgynous. It is sometimes conceived of as a collective of three or five individual kami. It is a popular figure in both Shinto and Buddhist beliefs in Japan. Inari's foxes, or kitsune, are pure white and act as her messengers.
 * Inari makes brief cameos in the Hidden Leaf Village Grand Sports Festival! and in Naruto episode 161 of the anime.