Twelve beasts and blood servants (十二眷獣と血の従者たち Jū ni kenju to chi no jūsha-tachi) is the twenty-first volume of the Strike the Blood series.
- Chapter One: Dawn of Beginning
- Chapter Two: Black Beast-Vassals
- Chapter Three: Girls Talk
- Chapter Four: Recollections
- Chapter Five: Blood Red
The volume was adapted into episodes 10-12 of Strike the Blood IV.