Yep! Although in case further filtration rules out a largish fraction of these demons they should maybe check a few more cities if Fëanáro's up for it.

He is so so up for pretending to be a demon! It is almost as good as really being a demon!

It's very cute. All the would-be adopters think he's very cute. (But they think he's a very cute demon.)

And eventually they have thirty people!

That seems like a good starting population! To Space! While they fly somewhere they won't be noticed vanishing he chatters about what his backup wish should be. 

Cam is happy to evaluate suggestions relative to the current information about what things are and are not experimental and what things are and are not likely to be within a reasonable risk tolerance.

Ability to put the contents of books in his eidetic memory just by touching them? Ability to conjure just written works, if he can't be a demon in full? Has anyone tried for mind-control powers that'd work on a Vala and sworn only to use them on future Melkors...

"The book thing's almost certainly safe. Conjuring written works - you might wind up with an adjacency limit but that's probably safe to try. Luster Findekáno has some mind control powers but we don't know if they'd work on Valar."

"Maybe we should find a nice Vala and ask if they'll let us try. I think my backup wish will be for books."

"And you're pretty sure you're not going to regret wishing to be a demon in twenty years or whatever?"

"Do you regret being a demon?"

"No, but I didn't knowingly use up a scarce resource on becoming one."

"It's not that scarce, there are lots and lots of people and even if there turn out to be a lot of things only Fëanáros can wish for, we can just fork more space Fëanáros."

"Your, personal wish is still scarce. You get one."

"Sure but anything actually important other people'd be willing to wish for and of unimportant things me being a demon is the best."

"Which makes sense if you think you will still think it was best forever."

"I think we will keep finding new magic and it'd be silly to wait until we've found all of it - might be infinite - before I decide what's best."

"Sure. That's not the only reason your opinion might change, though."

"Why else?"

"Maybe demons start seeming boring after a while. Maybe it turns out you really don't like terraforming planets, but there's all these planets to terraform and you're a demon so...."

"If I didn't want to terraform planets I'd stop. If I stopped terraforming planets because I didn't want to no one'd be worse off than if I'd never been a demon in the first place."

"Yeah, I guess that works if you aren't the type to feel obliged to terraform planets."

"I feel obliged to make up for having been born and having existed but saving lots and lots of lives doesn't actually change that feeling, only doing something irreplaceable that no one else could've done just as well changes that feeling. And separate from that I don't feel obliged to do things."

"...make up for having been born?"

"Boots says it's silly and if I were a Bell I could just stop feeling it. But I'm not a Bell."

"We're pretty good at customizing how our brains work. It's a thing. Don't know how to teach anybody else though."