User blog comment:12th Supernova/Chapter 803: Oh look it's Buggy/@comment-10543621-20151012102018

I really don't think the Ninja is even a Ninja. Kinemon has called people Ninjas and Kunoichi several times just cause they have strange powers. He's called Robin Kunoichi as well hasn't he? And I'm sure there were others?

If anything, this guy is probably just someone with an ability. Who knows, going by his name, maybe it's Enel.