I only remember hearing about the two gods Castiel mentioned and the Banshin, the gods of the Banzoku, which I don't think have been named yet. As far as I know, the only the only details about The Twelve that have been revealed are the names of Llymlaen and Nymeia, and all we know about the Banzoku are that they might be tied to the elements. The one they've shown so far sure looks like he could be Ifrit.
I have a feeling the worshipers of The Twelve will be split into different cults for different gods, but will all consider themselves connected in some way. Sort of like how quite a few real-world polytheistic religions have worked. Each cult has it's own unique faith, but most worshipers regardless of cult ties share a few core beliefs. I could see it being more organized than that though, perhaps with a central organization to which all the members of the different cults also belonged.
That it looks like there won't be one god who's responsible for all of creation is is definitely a good sign. Since I doubt they'll be able to cover every aspect of mortal life with just twelve gods, that leaves us a lot of room to make up our own. As long as you don't write it so that your character's beliefs are to be taken as the canon truth, you're fine, even if SE later writes something that contradicts your lore.
I have a feeling the worshipers of The Twelve will be split into different cults for different gods, but will all consider themselves connected in some way. Sort of like how quite a few real-world polytheistic religions have worked. Each cult has it's own unique faith, but most worshipers regardless of cult ties share a few core beliefs. I could see it being more organized than that though, perhaps with a central organization to which all the members of the different cults also belonged.
That it looks like there won't be one god who's responsible for all of creation is is definitely a good sign. Since I doubt they'll be able to cover every aspect of mortal life with just twelve gods, that leaves us a lot of room to make up our own. As long as you don't write it so that your character's beliefs are to be taken as the canon truth, you're fine, even if SE later writes something that contradicts your lore.