Himiko is introduced in the Phoenix anime as the reigning queen of Yamatai, a domain in Japan, during the year 240 CE. Her background is intertwined with a ruthless quest for immortality, which she believes can be achieved by capturing a mythical firebird known as the Phoenix and drinking its blood. This ambition defines her personality, revealing her as a powerful and deeply ambitious ruler who is willing to sacrifice anything to achieve her personal desires. Her motivations are entirely self-serving, prioritizing eternal life over the well-being of her subjects and any sense of moral responsibility.

Within the story, she acts as a primary antagonist whose military campaigns drive much of the conflict. She commands a formidable army and does not hesitate to use brutal tactics, including ordering the massacre of a small village, to accomplish her goals. Her role is cemented by her orders to invade the Kumaso people and her use of spies to further her objectives regarding the Phoenix. Her key relationships are primarily with those who serve her ambitions. Her general, Sarutahiko, leads her military forces, and her brother, a prince named Susano, is involved in the plot to capture the Phoenix. An elderly adviser named Sumuke is also part of this inner circle focused on securing her eternal life. As for her abilities, her power is manifested through her political and military might as queen, enabling her to command a powerful army and direct a network of spies to enforce her will across the land. The provided information does not give details on her character development.