Mr. Yan
Okay though I really not like Jing Zhen because of how he wronged his family but dude if he has something which can like alte someone's memories their appearance and everything so much under him, then it is only right for him to do anything to hide it lest it brings harm to more people after falling in the wrong hands. But it also wouldn't change the fact that we have to first save one life than saving all because ony by saving the individuals can we save the world and if we can not even save one person then how are we capable of saving billions of them