Agent Aika

Agent Aika

Plot

Tokyo has sunk into the ocean, along with most of the world, during a large-scale land subsidence. Aika Sumeragi is a salvager who works for a small company run by a father and daughter tandem. Alas, the company isn't exactly successful, and money is needed desperately. Thus, Aika accepts the very dangerous job of acquiring an artifact called Lagu for a hefty sum. The boss' daughter Aida Rion joins Aika on this particular mission, and the two set off.

Later on, Aika and Rion are captured by Rudolf Hagen — an effeminate but over-sexed man who wants Lagu and Aika (and just about every pretty girl) for himself. Hagen commands a huge battleship manned exclusively by droves of cute girls in mini-skirts (an example of what is often called "fan service"). Alongside Hagen is his obsessive sister Neena, who is jealous of Aika, as well as another salvager named Gust, who's also after Lagu and has a crush on Aika as well. When Aika's special bustierre is activated, she becomes a "superwoman" who can take on whole armies by herself.

• Aika Sumeragi (皇藍華), 26
  

She is considered to be one of the best in the business. She was raised as a test subject by her scientist parents who died in the catastrophic earthquake. She was protected by the bustier made by her parents and thus survived. She was then picked up by Aida Gozo, who raised her, and later on she works in Gozo's office as a Salvager.

Aika possesses a unique battle suit made out of 'ultranate' (or more accurately just "alternate metal" from the katakana オルタネートメタル), shaped into a golden bustier that transforms her into a dark-skinned and blue-haired woman with supernatural strength and resilience. But she dislikes the perfection attained by the transformation and tries not to rely on it. Although not used in the anime, in this form she is called Shivie Aika.

She is constantly fighting with Gust, who either tries to steal her bounty or hits on her. Aika will do anything to get the job done, even if it means sacrificing her morals.