system
A chat on 4chan
human
Lack of empathy. Emotionally retarded. Never sentimental. Morally weak. Rule follower instead of morality follower.

NPC means having no soul or having a dormant soul. Similar to the replicants in 'Do Androids Dream of Electric Sheep?' In order to tell if one was a replicant they were asked emotion inducing questions and observed the physical reactions of the subject. This is because the replicants knew what they should answer, but you needed to observe them in order to tell if they genuinely had an emotional response or not.
gpt
>Rule follower instead of morality follower.
This is a big one.