Aga Serene lives on the planet Limbos and is constantly at odds with Nabu. Aga aspires to be recruited into the Serien foundation so that he may venture outside of Limbos.

Set hundreds of years after the original, Yamato 2520 chronicles the adventures of the eighteenth starship to bear the name, and its battle against the Seiren Federation. <br><br>
On a planet harshly ruled by the Serien Federation, a group of earth teenagers discover the ancient hulk of the Earth Federation Battleship Yamato. By stealing it's data disk the teens are able to use the Serien's own automated ship yards to construct a new Yamato. <br><br>
(Source: Wikipedia) 

Husband of voice actress [Junko Sakuma](https://anilist.co/staff/111433).