Something else I'm wondering about in regards to Grifter. What exactly happens when a Daemonite hops into a human body? Is it simply a soul/mind transfer, or something else? We see this blue mist or ghost leave the bodies they were inhabiting when one dies. In some cases, it's more like they took a person's skin, and fit it over their regular bodies. The cop in issue 2, the one the military has video footage of impersonating a soldier.
The first method seems more careful, since it wouldn't seem to leave any evidence the deceased was anything other than a normal human, but the second seems to make them more powerful. At least, those Daemonites have kicked Cole around more than the one on the airplane was able to.
Maybe it's a progressive thing. They transfer their essence into a human, but gradually they form a body inside the person. Sort of the reverse of how a pearl is formed, where the oyster gradually coats the grit and builds up this shiny coating so it doesn't irritate them.
Which raises the question of how far they got with Cole. He can hear them and he's at least occasionally showing greater-than-human reflexes (catching an arrow fired at him). Whatever the Daemonites were transferring into him, it doesn't seem to have a consciousness of its own. That doesn't mean there couldn't be something forming inside him as things progress.
This is the frustrating thing about Grifter. There are all these conceptual things, world-building I guess, that I find really intriguing. Yet I didn't stick with the book because the characters failed to engage me.