Okay, for the sake of a story, I can suspend my disbelief in sentient submarines and ships. I can accept “mental models” of these vessels that look like adolescent girls. I can even believe that stuffed bears eat carrots. But I cannot believe that any military would store vital materials on Iwo Jima . “Sulphur Island” is the tip of a rapidly-inflating volcanic resurgent dome, and it’s rising out of the sea at an average rate of about eight inches a year, rendering any harbor or dock temporary. Soon, geologically speaking, magma is going to meet seawater, catastrophically. The creators of Arpeggio of Blue Steel need to do better research.