Hell Yeah, Campanion!

These are all my personal headcanons imo

Big D (Goldstar) is part bobcat, although not comparable by size but maybe by personality. Still trying to decide if he has all his nine lives, lost some, or never received any. I think in a warrior cats au, the Arcanum is its own clan, and various other hunter groups and supernatural clans are other clans. I think Goldstar would have taken his sons and made his own clan (still working on a name) after the incident.

I think Heavyclaw (Door) would probably be best fit for deputy, but I think it would be infinitely funnier if Deer (horse) was the deputy instead (more 40K accurate w Horus being warmaster).

Kitten was formerly a kitty pet but when his owners died, he was left to his own devices in the forest, and would run into SquirrelFlash (Markus) and join the original arcanum clan, before inevitably leaving with SquirrelFlash. He still wears rhe collar and clothes of his old owners, for unknown purposes.