Connections to a deity, how would that work?

This may seem strange, but I am curious. Let us say, there is a deity. And said deity is, in essence, the lord of all the realms of the world. Mostly.

And there was a creature, of sorts, that has a connection to said deity from before their ascension.

Would a priest of said deity worship the creature Becuase of their connection? Would… would the creature be classed as a holy figure because of that?

No, this has nothing to do with my lost memories pertaining to the Phoenix Queen…

I am asking because I am purely curious.