In Order to Stay as Myself - S1.E25

All but a few of the crew have been evacuated to the Lift Ship which contains the Vital Guarder. The Ryvius, now powerless and dead in space, is boarded by enemy troops, who are quite surprised to find that there are only children aboard. Ikumi Oze seems to snap under the burden of command. Kouji Aiba and Aoi Hosen must take one last, desperate gamble to save them all.