We’ll be hearing a lot about the outgoing Michael Phelps and his heir apparent, Ryan Lochte, this month. But it’s teammate Missy Franklin who could take home the most hardware. At six foot one and 165 pounds, with a six-four wingspan and size 13(!) shoes, she’s the Platonic ideal of a swimmer—built to dominate, as she did at the 2011 world championships (three golds, one silver, one bronze). In London, look for her to clean up in the 200-meter backstroke and 100- and 200-meter freestyle, and possibly to win as many as seven medals. And then look for her to do it again four years from now. Because the scariest thing about Franklin is that she’s only 17 years old.