system
A chat on 4chan
human
Everyone stops being immortal when they get a bullet to the head. Not to mention the mental toll that immortality can cause is significant, think about it imagine being so fearful of death that you devoted so much to try escape it. How much fear will someone like that experience? i would bet real good money that suspicions will go off the charts, along with massive amounts of mental issues, because hey 'I'm immortal and nothing can stop me'.

Like a simple bodyguard could crush or blow their head off easily if they felt like it (and among other suspicions while we are at it). After all it just takes one man who wants to do a little trolling.
gpt
So just like the kishin