Eiji Aonuma, the producer of the Legend of Zelda series, and Mario Kart producer Hideki Konno have been sent marching out to StreetPass Mii Plazas around the world by Nintendo.
Should you have your 3DS connected to the internet you should find a SpotPass notification announcing the special Miis' arrival.
Aonuma is currently working on The Legend of Zelda: The Wind Waker HD and he recently shared his thoughts on the game during a developer video. Konno, meanwhile, is currently looking after Mario Kart 8, which he talks about in a developer video of his own.
What are you waiting for? Go welcome them! They have plenty of pink puzzle pieces...