Himiko once led the Hachiryokaku before abandoning her post to ally with Garan, commander of the Garan Army, under undisclosed circumstances. As the older sister of Aira, current Hachiryokaku leader, she shares an unbroken telepathic bond with her sibling despite their rival factions.

Her striking features include short black hair, pale pink irises, and crimson lips. She dons purple tights rising to her chest, a black jacket, a violet collar, and a top hat. A skilled psychic, she exchanges silent thoughts with allies and enemies alike, including Garan and Aira, and wields razor-thin wires with lethal precision.

On Machine Island, Himiko witnesses Mazinkaiser SKL’s awakening and confers with Garan about looming threats. Later, she infiltrates the mind of Ryo Magami, an SKL pilot, extracting fragments of his traumatic history. When she shares these discoveries with Garan, the revelations trigger Magami’s violent outburst. After Mazinkaiser SKL seemingly falls, Kiba, head of the Kiba Army, confronts her, demanding the Iron Kaiser’s whereabouts. She divulges the location but is executed by Kiba moments later.

Garan and Aira simultaneously sense her death. While Aira grieves, Himiko transmits a final telepathic cipher to her sister, disclosing a strategy to halt the Iron Kaiser—a testament to her enduring agency beyond mortal limits.

Her design echoes the Slum Queen from *Violence Jack*, reflecting the series’ homage to other Go Nagai creations. The name “Himiko” invokes the enigmatic shaman-queen of ancient Yamatai, layering her narrative with mythic resonance.