He was an active industrial spy, but rode on the chance of the catastrophic earthquake and entered the salvaging business, setting up K2 Corporation, a Salvaging operation. He is Rion's father. He prefers to hold onto the old ways (cheapest price for the best service) and principles of doing business, which does little good to the business. His past with Aika goes far back.   (Source: Wikipedia)

A catastrophic earthquake has left Tokyo, and most of the Earth for that matter, under the sea. Aika is a salvager who retrieves various remains from the watery ruins. When Aika accepts the dangerous mission of locating and obtaining the mysterious Lagu, she discovers that she's not the only one after it.

[Twitter](https://twitter.com/AkioOtsuka) | [Profile (Mausu)](https://mausu.net/talent/otsuka-akio.html) | [Wiki (jp)](https://ja.wikipedia.org/wiki/大塚明夫)

Son of voice actor [Chikao Ootsuka](https://anilist.co/staff/95974/). In 2005, he married fellow voice actress [Youko Soumi](https://anilist.co/staff/95912/), but they divorced in 2009.

__Non-Anime Roles:__

- [Heismay Noctule](https://anilist.co/character/355708/Heismay-Noctule) - Metaphor: ReFantazio (VG)
- Koichi Adachi - Yakuza: Like a Dragon (VG)
- [Ryouma Hoshi](https://anilist.co/character/131655/Ryouma-Hoshi) - Danganronpa V3 (VG)

Aika is a smart and athletic high school girl. She is so competent that she successfully passes the salvagers license test, obtaining a C-class license. Yet, she is young and hotheaded, so much so that Gota still treats her as a child. Due to this personality, no one is willing to hire her for salvaging jobs. 
Since she had taken the trouble to get her license, she decides to post an ad in her school to attract clients. She manages to get the attention of Erika, a daughter of a rich family and the leader of the treasure hunting club. She asks Aika to salvage something from the sea and Aika delightfully accepts the request. 
However, upon seeing the state-of-the-art submarine loaded onto Erika's private cruiser and discovering their destination, Aika realizes the terrible nature of her assignment. This results in a clash with a group of high school girls in the southern islands. 
Who is the mysterious girl named Karen? So begins Aika's newest challenge! 
(Source: AnimeNfo)

Gerald Michael Charlebois is an American voice actor who has voiced in many anime titles. However, one of his best-known roles was a live-action voice-over, that being the voice of Prince Olympius in Power Rangers: Lightspeed Rescue despite being age 71. Formerly, Charlebois was a live-action film and television actor in his heyday, but has since been well-known for his voice-acting roles. Charlebois also was a regular in Roger Corman's movies.

**Full Name:** Gerhard Georg Jilka

[Synchronkartei](https://www.synchronkartei.de/sprecher/1304/2)

Aika's story continues, she is now 19 years-old, 3 years older than in R-16 and 7 younger than in Agent AIKa. Strange phenomena have been occuring at a girls academy. Slowly but persistently the most cute and beautiful girls are joining an internal club, but instead of a sing-in they just get abducted by a strange being that takes control over them by some indecent means. 
By coincidence Aika was flying-by on her plane when one of this abductions occurred and she was attacked to prevent her from comming closer, but instead of repelling her, she is intrigued about the attack's origin and then the opportunity shows up when her late partners from R-16 decide to investigate those abductions. The story remains full of action and panty flashing that are a must in Aika's series.
 
(Source: Anime News Network)

A bonus ep about Aika and company moving to a new office.

Gouzou Aida