one of the best fantasy fictions ever written. the story might seem draggy at first, but it all comes together in the last arc. the ending is worth it.
"Even if you kept going because you wanted to live on, that still counts as determination. Moreover, you were never gonna die in the first place as it was just an illusion"
"4 days 3 hours 22 minutes, and 41 seconds. That's how long you've been going down the rope. Even as a remnant soul I was shocked by your sheer determination"
But to truly be characterized as a villain, an individual must sign a pact with a demon. That was a pledge to devote their lives to the demons, in which the demon in return grants them part of their power.