Number 5

Number Five is the only Garde member who has not joined up the any other Garde. It is unknown which gender they are or what their Legacies are. It is hinted in "I Am Number Four" that a girl named Sofia is Number Five as she made the news when she lifted a huge piece of concrete off of a man in Argentina. She disappeared shortly after. This leads us to believe that she really is a member of the Garde, hiding from the Mogadorians.

WHERE IS NUMBER FIVE?
Number Five is one of the Ten childeren who escaped from Lorien alive. Her whereabouts are unknown. But, in the middle of the Rise of Nine, she looked to be somewhere near Jamaca. Shortly after, it looked like she was flying across the Atlantic Ocean.