btw "Douman" was probably a reference to the "real life" Ashiya Doman, who you might know as the rival of abe no seimei. This dude one of the most powerful onmyoji (though most people would agree that abe no seimei was better than him lol). Anyway, if this guy is getting name dropped maybe abe no seimei/his reincarnation would appear soon as well? Maybe even as an antagonist?