Blame!, Volume 7 — Tsutomu Nihei

Dhomochevsky and his ghostly companion Ico are unusual Safeguards: they are programmed to protect all the humans on their floor, not just those with pure Net Terminal Genes. But will they be able to protect Killy and Cibo from the Silicon Creatures who have infiltrated their level...and who seek a human genetic sample just like the one Cibo has obtained? "Action packed, bloody, and cerebral to the core, it's stunningly drawn and impossible to put down." -Dave Halverson, Play Magazine