It looks more like the ghost of some child's lost ball to me...

[Nope, she doesn't see what Hajime sees in the ghost that makes her think it's a he.]

[She grumbles.] I hope not. Lezard's already been messing with the skeletons when I warned him not to. [Yes, skeletons. He'd made them multiply in hopes of building an army of minions. A fact that she's somewhat grumpy about. It's made the idea of kicking him out of bed and forcing him to sleep on the couch again tempting.]