|Spoiler Alert: This page contains spoilers. Read at your own risk.|
|Full Name||William McCloud|
|Ability Name||Ozone Circle|
|Novel||Volume 20, Chapter 1 (First Appearance)|
Appearance and Personality
William has silver hair, with a slick clean cut. His bearing is very polite. 
William is 60 years old. He was leading research to strengthen naturally born magicians and to construct adjusted body magicians in a research facility at Darwin Base in his past. 
Ozone Circle (オゾンサークル) quickly uses high concentrations of ozone gas to paralyze opponents through acute intoxication from the magic.