Kalamari Outpost 2: The Sage Codex.. Kalamari Outpost, #2

Deep within the military autonomous zone of Kalamari Outpost, a storm is brewing. While nuclear armaments are illicitly funneled into the region in defiance of international treaties, a much more personal conflict erupts at the Soft Brain Cafe. Pika Oyama, the sheltered and relentlessly kind daughter of the formidable General Akashi Oyama, has struck up an unlikely friendship with two of the world's most dangerous girls, the "zombie" demolitions expert Zizi and the feared cannibalistic war criminal Joo Mi Paik, known as the Incubus Thousand Calamity.
When a bitter cafe owner recognizes Joo Mi Paik and exposes her dark past, a spark of vengeance ignites a city-wide manhunt. Pika, refusing to abandon her new companions, finds herself at the center of a violent uprising. As thousands of vengeful citizens swarm their position, the trio must rely on Zizi's tactical mind and Joo Mi Paik's lethal instincts to survive. From the shadows, the mysterious Wolf Starscope watches as a silent guardian whose intervention leaves a lake of blood in its wake.
But as the dust settles, a new path emerges.