I'm working on a mod for a pair of companions and could use a good example to learn from. Are there any companion mods out there that specifically handle two characters and have them interact with each other?
I'm aware of Vilja and her recognition of other companions, but that appears to be a one-sided example - Vilja's dialogs and AI adjust to the presence of other mods, but those mods aren't modified to change the other party. If I'm wrong about that, let me know.
I've seen a number that provide more than one companion, but don't appear to add any interaction between them. No cooperation, no rivalry, they're just both/all there.
You might want to write Emma, Vilja's creator, directly. What you propose I've been given to understand is hard to do, and most modders who create more than one companion mod simply use the standard CM template with no dialog additions.
Or write Sulteric Drums. He's the only modder that I can think of who has two companions with a lot of personality, Viconia and Stoker Wolff. But he's not active in Oblivion modding, any longer, and I suspect he's never investigated this.
Best of luck, in any case. I think it's a
great idea.