[quote=@BCTheEntity]
Because if that's the case, I could go the magitech harpy route to some extent with a bit of backstory tweaking, most notably the reason why there is demon-corrupted Machinatech around with the capacity to make somebody insane.
[/quote]

We're fine with this route but under a few conditions. If you go the magitech harpy route, it makes the most sense for them to be fighting for the Machina; but no demon-corrupted tech. Likewise, if you want demon tech then your character can fight for the Demons but no aspects of harpies at all.

[quote=@BCTheEntity]
I don't see how those three concepts are necessarily in conflict with one another, KoL.
[/quote]

We are not accepting composite characters that have type advantages of all three Factions, regardless if they are not in conflict with each other. This would be less of an issue if you wanted your character to gradually get tech and powers from all Factions via IC trophies and accomplishments much like [@The 42nd Gecko]'s Miyu did. But as it is now, you cannot start off with having all three.