Some time in the past, Genkaku killed Nagi's wife and this caused Nagi to go insane and massacre 22 Undertakers. Since then, Genkaku has continuously tried to get Nagi to join the Undertakers. The Undertakers played a big part in Scar Chain's mass prison break, as they were Scar Chain's direct enemies.
List of Undertakers
|1st squad leader||2nd squad leader||2nd squad assistant leader||3rd squad leader||Foot Soldiers|
- The foot soldiers of the undertakers are shown to be not only murderous but completely immoral as shown when they attempted to gang rape Shiro and Karako when they were both captured by Azuma.