Mm, I could kinda hit some of 'em sometimes. [IT'S COMPLICATED, but he'll try to explain, at least--]

Haruji made this body for me with his powers, so it's not really human. It's kinda magic too, see? But it's still more solid than I would be if I was still a spirit, so I can't always touch other spirits the way I used to.

[ie who even knows how tkrb mechanics work.]

It's definitely really hard for humans to fight things like that if they don't have any priests or whatever on their side, though.