[quote=@Damiann47]
I'm assuming that alongside whatever nation/company we're making we also need a character to play, makes enough sense that way. Also do I need to list landholdings like a nation?
[/quote]

No, Companies do not have landholdings, but if you ask the person first, you can (maybe), list where your companies HQ is.

[quote=@rush99999]
And what about singular characters and rebel groups. I'm gonna be a company as well, but I'm curious about the other things.
[/quote]

Rebel groups play like nations, but on a smaller scale.
With Singular Characters you just go through what they are currently doing.