|Age||Over 100 years|
|Species||Half Human, half Yokai|
|Debut|| Chapter 24 (Manga)|
Episode 9 (Live-action)
"A" (「A」) is one of antagonists appears in Jigoku Sensei Nube series. He is a legendary serial killer who killed at least 40 children in 30 years.
Originally "A" is a barber, but during someday a kids plays fire in his shop which caused a fire incident, that his skin body was heavily damaged. This causes "A" hate children and starts killing them even since.
Jigoku Sensei NubeEdit
Jigoku Sensei Nube NeoEdit
"A" reappears in Chapter 18 of the sequel Jigoku Sensei Nube Neo.