[Ghosts aren't gone in his world; they're just relegated to children, pretend stories, traditional lore, and "people who believe that stuff" to those who don't. Bakugo only believes in them from a very standoffish point, having certainly mocked people for being scared of ghosts, and bragging he was so strong, the ghost of someone he defeated couldn't even come after him. Youkai, monsters, even gods, never factored much into his life of heroes, Quirks, technology, battles, villains, and school.

He scoffs at the clarification.]

You think I pay attention to that old bullshit? I don't read children's fantasy stories.

[Like a lot of Japanese youth, he believes in the general pantheon of his culture, but it's never been personal. Ring the bell at the temple, pray for a good year, don't walk on gravestones, traditional stuff he did because his parents made him when he was younger and now it's just what's done at that time of year. Certainly hasn't bothered listening to tales of godly consorts.

Bakugo's two seconds away from blasting those little lights when they wisely return back to the other man.]

I heard someone say the whole fucking hotel's alive.

[Which is a lot more than just possessing some strange energy.]