A dragon of Earth, Nataku is an androgynous clone with extraordinary psychic abilities. It was created from the genetic material of Tōjyō Kazuki, the deceased granddaughter of the president of Tōjyō Pharmaceuticals, and her father Masaki. Sent by Chairman Tōjyō to retrieve the Shinken, Nataku's mission is to destroy the sword to prevent its involvement in the events of the Promised Day. During the theft of the Shinken, Nataku mortally wounds Kyōgo, the father of Fūma and Kotori, who tried to protect the sword. Haunted by memories of its past life as Kazuki, Nataku follows Fūma without question because Fūma resembles the person Kazuki cared for most—her father.
In Tsubasa Reservoir Chronicle, Nataku is a fighter for the City Hall faction. Unlike in X, he is a mentally developed adult and takes care of Kazuki, an alternate version of X's Kazuki (who replaces Seishirou's role).










