Pretty much everything in the Cthulhu Mythos is Bad News for humans. Alien beings who, at best, finds us beneath their notice. The ones that might take an interest are even worse.
Basically they're not exactly what you'd call "benevolent" and not something you'd want to casually call upon. Having one as a guardian spirit raises questions that I'm wondering if the author will answer.
That's some interesting information! Thank you so much!
I have faith in author-san. Cause thus far, we've met mostly bad-turned-well-meaning, evil-turned-okay bad guys, except for those alien shitheads in Banga arc and Saint Germain. I hope it would be explained too. Or at least, like the case of the cursed trunk, it got tamed and used for good.
Speaking of which, I finally googled the geezer and
oh damn! Always appreciate pop culture references in this manga 🙏