@chrona you seem pretty awful. That you can freely use terms like "trigger" so flippantly shows you're quite a sheltered, privileged person.
and you not understanding why the whole NPC thing is a really bad thing is really telling on the latter in particular. It's textbook dehumanization on a large scale, perpetuated on places like 4chan in an absurd manner but in a way that "reaches" the right people. And the more unhinged of those types will actually take it to heart, and consider other people not "real", and thus find an easier justification to kill them, like the incel murderer a bit ago. Stoking the fires of mass killers by giving them excuses leads to that and others like Dylan Roof et al, and the stupid NPC thing is just one example of many forms of dehumanization, as well as allows one to subconsciously disregard actual arguments someone may make. Dehumanization is never a good thing, just look at how people fleeing horrific violence in south america are being portrayed by the likes of fox news or the white house(or were, before the election was over). NPC is another form of that, one of many different types.
@ejala that's real cool. I know my local library carries a fair number of manga series too.