..... You don't even know how whatever it is you do works, do you.

[Athena makes a noise of disgust. God, she has to deal with vomiting monsters too? She doesn't have nightmares about it, but Athena's pretty sure she's still finding gross little chunks in the smaller cracks in her armor from when she fought the Sentinel... that was pretty damn gross.]

That might make sense, except they can also be caught in the same way the monsters of this land are caught. And those balls don't work on humans, so my guess is that it wouldn't work on those ghosts either if they were actual ghosts.