Devil Rebirth

Devil Rebirth (デビルリバース), also known as Devil Reborn or Devil Incarnate, is the largest character in the series and is at least four times taller than Kenshiro. Sometime before the main story, he was a merciless killer who slaughtered seven hundred people. He was sentenced to suffer thirteen executions for his crimes, but he miraculously survived all of them. Seemingly invincible, he was sentenced to two hundred years imprisonment deep within Billne Prison, a compound which houses the world's deadliest and rotten criminals.

Sometime during his years of imprisonment, Jackal possessed a photograph of Devil's mother and showed it to him. A surprisingly loyal son for his mother's memory, Devil has since felt attached to Jackal as his "older brother". At his brother's behest, he fights Kenshiro. His monstrous physique and might were threatening, but they failed to protect him from Kenshiro's attacks. Defeated and devastated, he cried for his brother to help him and held onto him in panic. He and Jackal perished together in his brother's lit dynamite.

Fighting Style
Rankan Nioh-ken is a forbidden five thousand year old martial art from Ancient India. The user is granted unfathomable strength and speed. They seem to have the power to manipulate energy to their will.