If Issei is defeated, Eli acts. She shoots at Relgar and moves two cells up, one cell to the left, and then two more cells up, facing the desert base. She moves this way only if Galmey cannot reach it (even through the mines).
If Issei is still alive, but has low health, Linnea shoots at him with a rifle, supported by Ipheon. If successful, Eli's action, as described above, follows.