That must have been very frightening... [He shudders as if he isn't transparent right now.] I see! That makes perfect sense. I had no idea you could see ghosts, Asahina-san! I'm very grateful, everyone else has run away in fear a few mere lines in!

As long as you don't perform any rituals, I wouldn't think the ghosts could do anything...but if you can see them we should be more careful.