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The youngest daughter and child of the Kagestu estate. She knows the secret behind the death of her father and attempts to help resolve the problem.
Mai Kagestu is the youngest child of the Kagestu estate, the daughter of Tobei Kagestu and the younger sister of Futa and Tsukiko Kagestu. At the beginning of the episode, she is introduced as the one who stayed with her father in his mansion before he passed on. As Futa, Naruto, and Shino discuss how Shino will substitue for Futa during the funeral, she presents dinner to the group which turns out to be poisoned, Mai mentioning that the back door was not locked and that anyone could have gotten in.
During the funeral, as the relatives attempt to make Naruto laugh due to Shino being poisoned with laughter, Mai shys away to meet an old woman in the woods, Shino eavsdropping as the old woman tells Mai to put the laughing poison into everyones tea if no one has laughed by the end of the ceremony. It turns out that the old woman is her father Tobei and that she led on everyone else to believe he was dead in order to bring the family back together happily, not squabbling over money and inheritance. Her and her father's plan turn out to be a success as everyone makes amends with one another.