Clearly after becoming a castaway Earhart learned to fight and became a ninja. She managed to get of the Island, and when she returned she became a bad-ass vigi

Clearly after becoming a castaway Earhart learned to fight and became a ninja. She managed to get of the Island, and when she returned she became a bad-ass vigilante. She didn't tell anyone she came back because that would have made it more likely that her secret identity would be discovered.