Nagare came into the picture after the Nadesico escaped from Mars; a skilled Aestivalis pilot, Nagare rescued Akito during battle as the latter was in a state of panic and unable to move. He was soon assigned to the Nadesico, bringing along Erina Won, who he had a mysterious relationship with. Nagare disparaged Akito for his devotion to the simplistic ideals of Gekiganger and the fact that he hates Japanese Anime altogether, but the two were still able to get along well enough.

Spoiler

Nagare is revealed to be the president of Negal, who only joined the Nadesico to keep an eye on the crew and to make sure they followed his shadowy agenda.