Board Thread:Off Topic/@comment-24993958-20151106142232/@comment-25396609-20151116031114

Let me see...

This character generally shows up as an author's wish fulfillment to be evil.

If I wanted to be evil i would just go out and murder someone.

Alternatively, in fanfiction, it might show up because the author favors the villain and wants a vicarious relationship with them.

About as nope as it gets

It might be a consequence of Evil Is Cool, taken to the logical extreme.

Not even remotely

Or, perhaps, the author just has a distaste for some (or all) of the protagonists and created the character to facilitate a Hate Fic, Fix Fic, or Revenge Fic.

Once again, nope. He's a divergence point from the canon

Either way, the same author favoritism and plot bias are now working for the forces of evil. It may also come about as an attempt to create a Magnificent Bastard or similar style of villain, only to go too far and become one of these.

A tiny bit of that last one, admittedly.