|Spoiler Alert: This page contains spoilers. Read at your own risk.|
The Isshiki (一色) Family is one of the 18 Assistant Houses, bearing the number One (一) in their name.
Airi's signature magic, Lightning; in order for it to be used the user must perceive information through magic that is recognized by the spirit without the intervention of the brain and nervous system, which consists of two parts magic that directly orders the body's movement and spirit. 
- Isshiki Airi's Mother
- Isshiki Airi
- Unlike the Ichihana/Ichihara Family, the Isshiki Family's magic to manipulate the body, specifically the brain and nervous system is used directly upon the user and not others.