Kobayashi's killing another 6th. Calling it now.
but it's also using the trope of showing that the peoples on the side of darkness aren't truly evil.
...the katakana spelling of his name is "nairu", so it's "Nile", not "Nil"
Alright, I think his name got a bit screwed up in translation. I'm pretty sure it's supposed to be 'Nil/Null' but the German pronunciation of the word got screwed up. In German, 'nil' is 'null' but it sounds a bit like 'nairu' when pronouncing it.
I could be entirely wrong though.