Masahiko Kutani encountered infant Himiko Himejima as she materialized within a luminous sphere at his archaeological dig—a phenomenon only he witnessed. He became her guardian, forging a sibling bond where his protective nature balanced her playful mischief, though stress could unravel her into a fearful or imperious demeanor.

During adolescence, their exploration of ruins triggered Himiko’s pendant, hurling them into Yamatai—a kingdom gripped by Kune’s three-year occupation after a disrupted queen ritual. Masahiko instantly prioritized Himiko’s safety, confronting threats with fierce courage yet occasional recklessness if she seemed endangered.

In Yamatai, Masahiko uncovered the Bokka, a mystic force tied to Himiko’s pendant. Alongside her and the queen candidates—Imari, Shino, Seika, Fujina, Kouran, and Tadami—he resisted Kune’s governor-general Shikara, battling to reclaim the kingdom.

His unwavering bond with Himiko anchored every action, fueling his adaptation to Yamatai’s perils and his commitment to its liberation.