Tequila_Mockingbird says:
[I do like the concept, but my concern is how that character would function with the group. Since the remainder of the PCs are full, in-control demons, I'm not sure why a mortal would be involved with their agendas and politics (unless we're talking thralls, of course). But I'm certainly open to any ideas or suggestions.
Yea, I had identified the same issue, and there are a few things that can help it work naturally...
1. the host is an amateur Occultist (they got possessed while trying to "just" summon a demon) and so could reasonably WANT that window into the demons' world,
2. it would simply be a part of the "deal", the mortal doesn't get access to the sweet demon powers if they don't give too,
3. the mortal isn't in full control, just most, but so sometimes the demon is able steer,
4. aren't we playing the "good guy-demons" (such as they can be) and so aligning with more humanistic goals anyway (save the city?),
5. it's an arc, the demon is gaining full control, and I'm a player choosing to play with the group, I understand that's why I'm here, I'm not gonna pull a "It's what my (mortal) character would do..." at the expense of the campaign I signed up for
I think there are still big questions about how such a demon/situation would be received by the greater demon community, and so possibly the group, but I thought that was part of the interesting thing to play out - unless that answer is, other demons/the group saying "You can't be here.", but if they observe 5. just as I do, and look for the reasons why it works too, I think it could be interesting, entertaining, dramatic, and fun, all at the same time.