Maina, a priestess of the Houtua—an insectoid humanoid tribe evolved from humans stranded on Earth—shares her sacred duties with her twin sister, Miana, safeguarding survivors of the fallen United Earth Forces. Her striking blue hair, vivid green eyes, and intricate tribal markings accentuate a petite frame of 150 centimeters, clad in traditional garb: a blue top, dark red skirt, and sturdy sandals.

Marked by a sharp intensity contrasting her sister’s demeanor, Maina distrusts outsiders, preemptively ambushing intruders with lethal precision. Her arrows, laced with self-replicating nanometal capable of consuming organic matter, pierce even the armored hides of Servum. Beyond combat, her telepathic gifts bridge vast distances, while flickers of foresight allow her to alert allies like Haruo Sakaki to impending dangers.

After rescuing Haruo from debris and treating his wounds with herbal powder, their bond deepens despite initial friction. Mistaken for Miana, she later asserts her identity, seeking to "connect life" with him through a union that blossoms into romance, marriage, and pregnancy. Amid battles against Godzilla Earth and Exif manipulations, she forges tactical pacts, aiding Martin Lazzari in shielding Haruo and channeling Mothra’s dormant egg to repel Ghidorah’s psychic onslaught.

Haunted by Haruo’s recklessness yet unyielding against cosmic threats, she endures his sacrificial demise to halt nanometal corruption, thereafter raising their child alone. In later years, she presides over rituals deifying Haruo, her legacy entwined with Houtua lore—their evolution shaped by Earth’s radioactivity and whispered ties to Mothra’s ancient symbiosis.