Discovered as an infant by Masahiko Kutani at an archaeological site with only a bronze pendant, Himiko Himejima was adopted by a prominent archaeologist. He named her "Himiko," meaning "Child of the Sun," after the pendant’s flame-like reflection visible under specific light. Raised in contemporary Japan, she matured into an ordinary high school student known for her spirited personality and fondness for teasing her childhood friend Masahiko. Her routine existence fractured when an incident at that same archaeological site awakened her pendant’s dormant power, catapulting both her and Masahiko back through time to the ancient kingdom of Yamatai. This transition occurred three years after her infant self had been sent forward, meaning fifteen years passed for Himiko while only three elapsed in Yamatai.

Thrust into a Yamatai occupied by the Kune empire, Himiko confronted the abrupt loss of modern comforts, confusion over her displacement, and skepticism toward those proclaiming her a divinely sent savior tied to the sacred Bokka flame. Frustration and resistance defined her early reactions. Masahiko pledged to secure their return, their bond evolving from sibling-like familiarity to include unspoken romantic undercurrents. Himiko later uncovered her true origins: she is the biological daughter of Enki and Iyo, the original guardians of the Bokka flame, who used its power years earlier to send her infant self into the future during the Kune invasion.

This revelation reshaped Himiko’s connection to the Bokka. Her pendant became a conduit for its power, which she gradually awakened and mastered throughout the conflict against Kune. Manifestations included protective shields, offensive weapons like swords, explosive forces, long-distance vision, and communication abilities. Her journey involved reconciling her modern identity with her ancient heritage, shifting from reluctance toward tentative acceptance of her role linked to the Bokka and Yamatai’s destiny.