Ah, I see. I'm thinking of-- creatures, would probably be the best word, who are typically only visible to people with a strong spiritual ability. [So they can't really know either way whether this is an ayakashi-- or any sort of spirit in the way Natori thinks of when he uses the word-- or if it's something that only appears for the person who turns around. Not without Vangeance testing it, but it'd be reckless to have them both marked for turning around just to investigate a minor point.] ...But still, it's a spell based on some sort of spiritual power, so even if you wouldn't be able to see them it still should have...

[Oh, of course. He's forgetting the obvious way to narrow it down. He wiggles around within their little arbor cage until he's showing the back of his neck to Vangeance, shoving the ends of his hair up to ensure the ayakashi that lives on his skin isn't covered by anything. It looks like the shadow of a gecko, solid black and flat against the nape of his neck like a tattoo, except that when it's revealed it skitters to the right towards his collarbone with a quiet slithering sound.] See anything?

[It's only visible to people with that same spiritual sense-- like, I'm guessing Vangeance can see it, basically follow the same rules we'd follow for Stands]