Volume 12

Knight vs. Devil is the twelfth volume of the Fire Force manga series, written and illustrated by Atsushi Ōkubo.

Summary
Shinra has experienced another Adolla Link, but this time it has allowed a mysterious girl known as the “First Pillar” to take over his mind. He claims to have given up on being a hero and now wants nothing but revenge. Can Arthur bring Shinra back to his senses, or will the Knight King have to slay his old rival?