The Case Study of Vanitas : Episode 5

Well that was an impressive and impactful flashback episode. Getting some real good background on the events of the past. Also a good look at how people are being corrupted. But I do have a question, does Naenia need to visit everyone to corrupt them in this method, showing them a past and convincing them to freely give up their true name. Or are their multiple Naenia’s going around doing this. Or various types of corruption, like some get corrupted by a more natural disease like corruption and others are forced by Naenia.