I've done something similar for learning about a controversial topic. I ask it to act as if it is called Bob is a well informed supporter of one side (like Ukraine) and then act as if it is something named Alice who is a well informed supporter of another side (Russia) and they have to debate each other over a few prompts with a moderator named 'Sue'

Then after a few rounds of the debate where Sue asks a bunch of questions, I ask it to go to the judges - Mark, Phil, Sarah (and I add a few personalities to each of them... Sometimes I pretend they are famous moral philosophers) and then I have them each come up with a rubric and decide who is the winner.

Really fun, and helps me understand different sides of issues.