Anna attends NAZKA Academy as one of five students investigating the school's unexplained phenomena, including alien abductions and infiltrations by hostile Reptilians. She collaborates with friends Ray, Tyler, Halle, and Eisuke to uncover the truth behind these events and avert Earth's impending crisis.

Following the discovery that Halle's sister was abducted and implanted with a chip by Grey aliens, Anna participates in exposing the extraterrestrial presence within their school and society. She assists Professor Suguru Yoake in employing a specialized device to contact benevolent aliens, resulting in an interplanetary voyage aboard a UFO piloted by an Ummo alien. This journey transports the group to multiple planets, where they encounter cosmic truths and revelations about their past lives.

Throughout these events, Anna experiences personal growth, learning to embrace her introverted nature and value authenticity over societal conformity. Her realization forms part of a collective thematic journey where each group member achieves distinct personal insights upon returning to Earth.

Anna remains engaged in subsequent missions alongside her friends to counter the Reptilian threat in later events.