Little Gui watched the Netherworld Officers withdraw and relaxed a little, then whispered with a laugh beside the Seven-Star Fish:
"Did you see that? This lady's deathly pale, and her eyes keep wandering... is she human or a ghost?"
"I know how to tell. Try touching her," Stelle said.
"Huh? How would that tell us?" Little Gui looked at Stelle in confusion.
March 7th could not help casting a puzzled look their way, either.
Stelle recalled her experience subduing the Horrific Maze with Jiang Yu. "If you can touch it, it's human. If you can't, it's a ghost. But Little Fish said you don't need to fear anything you can touch, because you can beat it up. You have even less reason to fear anything you can't touch, because it can't affect you at all."
"What if it affects you mentally?" March 7th asked.
"Then beat it up!" Stelle answered at once.
"But I still can't touch it just because it's affecting me mentally!" March 7th continued.
"If it's already affecting you, why wouldn't you be able to touch it?" Stelle countered, then brought out Jiang Yu's theory. "When it can affect you, you must also be able to affect it.
"It's like the two sides of the same sheet of paper. When you can see each other but can't interfere with each other, you must be two parallel lines. When you can see each other and interfere with each other, you've already become the same line."
When Stelle finished, March 7th and Little Gui still looked rather bewildered. Clearly, they understood, but not entirely.
At that point, Jiang Yu spoke.
"You know about ghosts making people walk in circles, right?"
Both of them nodded.
"Good. For example, in some of those stories, people keep going around on the same