"So the powers I've seen you exhibit are ghostly in nature?" Wangji is struggling a little process that. It means he could be dead? But he said 'part ghost' so perhaps his parentage is just..?
"I am relieved you did not suffer from the effects of being stuck in a vacuum cleaner."

Everyone here is special, this must be just one of them.

"Hm. Then I will keep you informed if I suffer any adverse effects. Lead the way."