Kenji Fujikido  

Ichirou Morita, Ninja Slayer, 藤木戸 健二 / ニンジャスレイヤー

After losing his wife and child in a ninja battle, salaryman Kenji Fujikido is possessed by the soul of a mysterious ninja known as Naraku Ninja. As their desires for vengeance and massacring ninjas align, they create Ninja Slayer, a fearsome killing machine that resembles the Grim Reaper. The more their minds and bodies become one, the stronger Ninja Slayers karate becomes. If Kenji fully surrenders to Naraku, his karate will become almost unbeatable.