Noun
gray ghost (plural gray ghosts)
Alternative form of grey ghost
The inspiration for Gray Ghost came from two significant events in my life, fly fishing on Andros Island in the Bahamas, and the passing of my mentor and fellow detective, Koti Fakava. Source: Internet
We have Simon Trent / Gray Ghost pop in. And he is not just a cameo; he's kind of an important part to the story, and he comes back throughout the book. Source: Internet