1) Make a list of fifteen characters first, and keep it to yourself for the moment.
2) Ask your f-list to post questions in the comments. For example: "One, nine, and fifteen are chosen by a prophecy to save the world from four. Do they succeed?", "Under what circumstances might five and fourteen fall in love?", "Which character on the list would you most want on your side in a zombie invasion?"
3) After your f-list has stopped asking questions, round them up and answer them using the fifteen characters you selected beforehand, then post them.
I've written a list of characters, to make it interesting each is from a different fandom I've written for, and all of them are characters I've actually written about to the extent of giving them dialogue or describing their actions.
Want to ask questions about them? Here's the list of fandoms fanfiction.net thinks I've written for, it's actually a lot more but I'll limit myself to this subset:
[list of fandoms]Buffy: The Vampire Slayer, Angel, Sandman, West Wing, Stargate: SG-1, Buffy X-overs, Harry Potter, Batman, StarTrek: Deep Space Nine, Pirates of the Caribbean, X-overs, Marvel, Men In Black, Lois and Clark, Highlander, CSI: Miami, Doctor Who, Book X-overs, Superman, Torchwood, Misc. Movies, Babylon 5, NCIS, Bones, Batman Begins/Dark Knight, Young Wizards, Wallace and Gromit, Terminator: Sarah Connor Chronicles, Hancock, Avengers, Supergirl, Ghostbusters, CSI, Wildstorm Heroes, Misc. Comics, Misc. Books, Misc. Tv Shows, Superman, Dogma, Vertigo, Green Lantern, Lord of the Rings, Mission: Impossible, Terminator, St. Trinian's, Thunderbirds, Smallville, Janet Evanovich, X-Men, Wonderfalls, Captain Scarlet, CSI: New York, MI-5/Spooks, CHIPs, Veronica Mars, Constantine, Perry Mason, Watchmen, Dead Like Me, TV X-overs, Doom, Dexter, Movie X-overs, Scooby Doo, James Bond, Sarah Jane Adventures, Battlestar Galactica: 2003, Austin Powers, Discworld, Good Omens, Space 1999, True Blood, Zombie Survival Guide, Twilight, Supergirl, Castle, and Avengers.
I'll do the answers tomorrow or as soon as I have enough prompts to make it worthwhile.
Note - to avoid gender and other biases I've used the randomiser at random.org to randomise the list.
OK - now closed - posting the answers momentarily