Children of Leviathan

is a Japanese light novel series written by Yasumi Atarashi, with illustrations by Shirai Eiri. The series began publication on May 10, 2022 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Leviathan, a mysterious giant creature that suddenly appeared off the Pacific coast and took many lives and dominated the seas around the world-commonly known as Rev. In order to counter the monsters that are hard to beat with conventional weapons, human beings created a humanoid weapon 《Gideon》 that puts a child on an aircraft consisting of the corpse of Rev. A high school student, Zenba Ashito, who worked as a local private Gideon passenger, and his childhood friend, Erin Miyazono. One day, the UN army elite Fuori Yua appears as a battle instructor under the two of them. At the beginning due to the difference in circumstances, The three people who collided and passed each other eventually built a solid relationship of trust through rigorous training and missions. And, in the battle between death and the side-by-side Rev, Ashito reached the time of awakening. Robot Juvenile over the sea and loss.