Ines haunts the moon as a mysterious woman bearing the physical likeness of Yayoi Okina, a woman deceased on Earth roughly one year earlier. She claims to have awaited Yoshiyuki Otomo upon their meeting, maintaining an unexplained connection to Yayoi.

She holds a direct link to Project Kaguya, the Constans Corporation's clandestine operation involving an ancient alien entity called the Sleeper or Darkness. Identified as one of many clones derived from this entity, Ines shares her appearance and attire with these duplicates. These hostile clones relentlessly hunt both Ines and Yoshiyuki.

Her critical function involves delivering urgent messages to Yoshiyuki. She declares he possesses a unique destiny tied to his cybernetic arm, designating him as the only one capable of halting the Sleeper. She warns that the Sleeper's full awakening poses an imminent existential threat to Earth, conveying this during fleeting encounters before vanishing without warning.

Her existence is phantom-like, marked by sudden appearances and disappearances across the lunar colony. Moments of fragility pierce her demeanor, notably when she shouts at unseen presences. Her origins prior to the lunar events and her ultimate fate following Yoshiyuki's confrontation with the Sleeper remain undisclosed.