"Don't fly off the handle, oneesan." It's not teasing; the Sayu he'd call "little sister" is gone forever, and this one, for all her maturity and control, looks roughly as if she might wet herself. "We've been here six years, and we've never been overrun yet. There weren't many of them in Siberia to begin with."

Of course, there's the sea, and the ones frozen in the swamps, but mostly the peninsula is clean.