The year is AD 2225. Kouji Aiba and Aoi Housen are serving as astronauts in-training in Liebe Delta which is located on the edge of the Geduld Sea. When saboteurs with unknown intents suddenly strike during a routine dive procedure, the space station plummets into the Geduld, a plasma field that links all the planets like a nervous system and crushes any ship that strays too far into it. With all the adults onboard killed, the young astronauts will have to survive this long journey home in midst of the growing tension amongst each other. Meanwhile the organizers of the sabotage look on and prepare to attack once more.
Kouji Aiba: A diplomatic, average student caught between family conflict and burgeoning romance aboard the Ryvius.
Swaile Brad
Aoi Housen, a flight attendant trainee and childhood friend to Kouji Aiba, acts as a maternal figure to him and his brother.
Carter Alexandra
Airs Blue, Ryvius's teen captain, unleashes his violent side, aided by a unique needle pistol.
Francis Andrew
Easy-going flirt, Ikumi hides a painful past, cherishes life, and protects Kozue.
Switzer Bill
Orphaned leader Juli, intelligent and kind, though lacking self-confidence and charisma.
Sheridan Kelly
Gifted pilot Yuuki Aiba, a lone wolf with superior skills, operates the Ryvius's Vital Guarder mecha.
Morrow Kirby
