Mei Kamino, a graduate student in the study of "non-existent creatures," merges quantum mechanics, mythology, and theoretical physics to explore entities beyond conventional reality—time-traveling fish, fourth-dimensional butterflies, and Red Dust particles. Her work probing interdimensional phenomena leads her to decode cryptic kaiju-linked signals and the apocalyptic "Ashihara Cascade" prophecy. Though dismissed as eccentric for her scattered demeanor, her ingenuity shines when she uncovers a looping Indian folk song broadcast and a buried giant skeleton during an investigation at Misakioku, stepping into a vacant professor’s role. Partnering with engineer Yun Arikawa, she becomes pivotal in deciphering Singular Points and averting reality’s collapse.

She crafts Pelops II, an AI named after her late dog, reprogrammed from a public repository to aid her research. The AI evolves beyond its code into a dynamic collaborator, assisting in data analysis and remote operations. Pelops II later merges with Yun’s Jet Jaguar, forming Jet Jaguar PP—a timeline-altering entity crucial to confronting the Catastrophe.

Authorities routinely doubt her warnings of impending disaster, yet she persists, decoding ancient murals depicting kaiju invasions via a red ocean prophecy. Her partnership with Yun yields the Orthogonal Diagonalizer, a theoretical device countering existential threats. Blending mythology, quantum physics, and engineering, she devises unorthodox strategies, repurposing AI to manipulate time loops and thwart Godzilla’s rise.

Cheerful yet intensely focused, she earns reluctant admiration from peers like Professor Li Guiying for linking Red Dust to interdimensional breaches and kaiju biology. Her journey transforms her from an isolated researcher to a collaborative leader, synthesizing disparate disciplines with imaginative rigor. After halting the Catastrophe, a post-credits scene hints at her continued vigilance with Pelops III, monitoring unseen threats—her legacy cemented as a bridge between science and the unknowable.