Children of the Whales manga volume 13 features story and art by Abi Umeda.

Orca has captured Ouni and Lykos, and seems to have no further interest in Amonlogia or the Mud Whale. But the chaos he left behind continues to reverberate as Rochalizo is forced to make a critical choice and Suou must face the true burden of leadership. Meanwhile, the eyes of the mysterious emperor have turned toward this far-flung battle on the sands, and his attention does not bode well for anyone.