Board Thread:General Discussion/@comment-27023843-20160702213248/@comment-27089028-20161224140225

I'd like to think Chara is neutral and pacified inside of Frisk at the start and if you go on a Pacifist Route he becomes positively influenced by this and is more or less your helpful narrator. If you go Genocide, it will only serve to confirm Chara's 'kill or be killed' philosophy and will become influenced negatively thus he will go off the deep end big time.