Volume 10

His Brother's Keeper is the tenth volume of the Fire Force manga series, written and illustrated by Atsushi Ōkubo.

Chapters

 * Chapter 79: Before the Fight to the Death
 * Chapter 80: Shō's Abilities
 * Chapter 81: The Elder Brother's Stubborness
 * Chapter 82: The Evangelist's Blessing
 * Chapter 83: Fourth Generation
 * Chapter 84: Smile
 * Chapter 85: Plot Disclosed
 * Chapter 86: Fire Force of "Wisdom"
 * Chapter 87: Medicine and Fire

Reception

 * In its first week of sale in Japan, volume 10 sold an estimated amount of 42,169 copies and during its second week it sold an estimate amount of 27,246 copies, giving an estimated total of 69,415 sold copies as of August 30, 2017.