Zzzap can see ghosts

St. George glanced over at the window. “What about you?” he asked Zzzap. “Can you tell who they were?”
The gleaming wraith hung just outside, shedding his excess heat to the open air. He shook his head. "I can see little wisps and glimpses of them," he said, "like I’m seeing something out of the corner of my eye, but Max is the only one I’ve ever seen clearly.”

Excerpt From?Ex-Communication, pg 237
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546