From hobsonphile, astrogirl2, and labingi, mutated a little (like labingi, I couldn't see why the questions should be screened).
- Make a list of 15 characters first, and keep it to yourself for the moment. (That way people won't fit the questions to the characters.)
- Ask people to post questions in the comments. For example:
"4, 6, 9 and 10 are starting a band together, what is their name and what kind of music do they play? Also, who's the lead singer, and what instruments do the others play?"
- When there are enough questions, round them up and answer them using the 15 characters you selected beforehand, and then post them.