I’m kinda excited to see which pathogen it turns out to be and what flammable substance it turns out to generate.
Really hope it doesn’t turn out to be something which would not, realistically combust in said circumstances, as I have seen in a few other stories. That would be another let down.

There being no classification above S class means there will be a big power disparity between people of S class.

Wrong country, wrong boss.

Choose your targets wisely. Not all objects referred to by a common noun are the same.

Remember, demons can say, “My parents were killed by humans” as an excuse to kill human children.