Kawaki (カワキ, Kawaki) is a child raised by Kara to be the future vessel for Isshiki Ōtsutsuki and the key to the fulfilment of their greatest wish. After being brought to Konohagakure by Team 7, he is taken in by Naruto Uzumaki who raises him as his own, during which he develops a brotherly bond with Boruto Uzumaki to solve the mystery of the Kāma. Later, after passing a necessary test, Kawaki was accepted as a Konoha genin.

As a child, he lived alone with his abusive drunken father, Kokatsu. In the anime, he was forced to chop wood for a living in order to buy alcohol for Kokatsu. One day, a goldfish merchant invited him to a goldfish show that he was holding the next day after Kawaki had shown interest in the goldfish. Later, his father noticed the invitation in his pocket and punished Kawaki for interacting with strangers by forbidding him dinner. The next day, Kawaki was beaten by two boys until the goldfish merchant saved him and offered him a job by helping him sell goldfish in other villages. Kawaki hurried home after noticing the crack in the glass of his father’s alcohol. Giving nothing but broken glass, Kawaki was locked in a room by Kokatsu.