cac loài quỷ cấp cao có thể sử dụng thao túng thông tin để che dấu đi thông tin về tồn tại của mình, khiến cho tất cả mọi người không biết về thông tin hay lí lịch của họ.

[......It may have been that they couldn't take any action. What about that demon that Kaito-san said he encountered?]

[As we had expected, "he wasn't able to catch the demon's name.". It must have been the Information Concealment Magic that the upper-level demons often used, if you think about the fact that this demon had "forcibly canceled" the Recognition Inhibition Magic that was supposed to be applied to Miyama-sama, it's easy to predict that he must be a high-ranking demon. Moreover, this too......]

https://www.foxaholic.com/novel/i-was-caught-up-in-a-hero-summoning-but-that-world-is-at-peace/7/