Only two characters - typically one male and one female.

They really sound like radio DJs, upbeat, uplifting, great energy.

I am usually so dismayed by the length of the podcast I get that I don’t bother to explore it further. So I have never assigned a particular persona to the characters. I will let you know if I ever do so 

cryotosensei

NotebookLM Workshop

When you create podcasts, are you able to assign roles to multiple characters or speakers, so it is more conversational? I've definitely heard a few like this lately. 