Often times when an Author tries to write an "Insane" character, they come off as silly, comically Evil or just stupid. Very rarely does someone give a real depiction of a truly menacingly Insane character, where you can see the Madness right from the start. I have to say, well done. https://mangadex.org/title/20393/choujin-koukousei-tachi-wa-isekai-demo-yoyuu-de-ikinuku-you-desu
XD Oh Dear lord. This is why you never anger a Doctor. https://mangakakalot.com/chapter/ch...kai_demo_yoyuu_de_ikinuku_you_desu/chapter_39