Members of a class of medieval Japanese mercenary agents who were trained in the Martial arts and hired for covert operations such as assassination and sabotage. Technically, they are practitioners of ninjitsu as a specific discipline, although the term is now used for almost any dark-dressed katana wielders.
In 2014, a group of ninjas served as a backup for Lamia during her assassination attempt on Jacob Stone in a bar in Oklahoma. When Lamia got stopped by Eve, the Ninjas quickly entered the bar. They wore masks and wielded knives while they tried to reach Eve and Jacob. One used a whip to disarm Eve who drew a gun on them. In the ensuing melee, Eve and Jacob used chairs and bottles to fend off the ninjas. The ninjas were unable to overcome Eve and Jacob who knocked them down and then escaped.