The spirit bodies that were controlled by Tang Zhen were the innocent citizens who were killed by the ghouls. They were formed due to the abnormal fluctuations of spirit Qi.
Because they died too miserably, their hearts would be filled with anger and unwillingness, and their resentment would continue to grow.
They would automatically become hungry ghosts and confuse the minds of ordinary people, making them enter the nest of ghouls.
She was clearly the victim, yet she jumped out to harm others. It made people feel angry and hateful.
This was also a very helpless thing. Spirit bodies were formed by obsession, which meant that they were one-track minded and could not distinguish right from wrong.
Everything he did was based on his instincts.
Only a very small number of spirit bodies would be lucky enough to retain a trace of spiritual intelligence and then have the learning ability of an infant.