, a three-episode OVA prequel to the classic Agent AIKa series, concludes its high-octane introductory arc in Episode 3, titled "Deep Blue Girl." Produced by Studio Fantasia, this episode serves as the climax for a 16-year-old Aika Sumeragi’s first professional foray as a C-class salvager. Episode 3: "Deep Blue Girl" Plot Overview

Aika and Eri locate a hidden, derelict airport submerged at the bottom of the ocean. This site serves as the gateway to the "truth" hinted at by the butterfly insignia on Karen's body.

Upon reaching the underwater base, the team infiltrates a locked laboratory. It is here that Karen’s origin is finally unmasked: she is revealed to be a high-intelligence clone resulting from clandestine biogenetic experiments.