Prospero had stopped laughing by now and picked himself up off the ground, "With the sort of insight you've been showing I'm a little surprised you haven't figured it out yet. But since I did promise and I got fun out of the deal I'll be as direct as possible, 'kay?" after taking a moment to dust himself off and summon up some dignity and seriousness, he turned back to the assembled 11th generation candidates "My name is Prospero Merlin and I'm your Mist Guardian! It's nice to meet you! As for why I set all of this up, well like you just said, I was testing you." 

As he continued to explain himself, for at least a second Prospero's light-hearted tone faded away and his eyes glittered cold and hard beneath his mask. "See, I have important goals of my own in the underworld that the various Famiglie call home and I can't afford to serve under the sort of Boss who would only get in my way, or ally myself with the Vongola Family if it chose someone like that as a candidate to lead it. Getting others involved was regrettable but necessary if I wanted to see a real reaction from you and test your limits, nothing more, nothing less." 

Prospero brightened up immediately afterwards, the change noticeable even underneath his mask "But the good news is you passed with flying colors and nobody was ever in any real danger from the very beginning! The rest of the audience just filtered away 'cause of hypnosis and a few other tricks while disguised by an illusion. By now they're safe and sound and probably talking about how amazing it is that I could teleport them all out of the show or something. But I don't really know why it didn't work on those two..." He indicated Michael and Artemis with a frown before turning back to Naoto "Now, any other questions from you or the others? I don't usually do Q&A sessions after my shows, so consider yourselves lucky!"