The prompt affects that a lot. If I input my writing and ask an LLM to “evaluate,” it will tell me how astute and intriguing my ideas are (often to the point of hyperbole). If I ask instead for it to “critique” me, I’ll get a much less complimentary response about the same content.
There is limited prompt control. You can provide podcast production notes for the AI to play off of, and they tend to honor it. I don’t know that they’d so completely change their personalities to suit it though.