She found him on her first day on the island, and tried to speak to him, but he did not see her. He was a strange boy, and spoke to the dead, and his language was not her language. But he was the only other person there.
The princess found some food, and brought it to him. Soon he saw her, and they began to learn each other's languages.
It was very good, because soon more people began to come to the island, and the girl had to help them, and learn from them, and welcome them, although their ways were strange to her.
The secret of how to turn poison into beer, for one thing. Well, she was shown how, but she learned something more about the trick than people knew before. But there was something more important than that.
She was the one who realized that the island she'd washed up on had a history more brilliant and amazing than anyone had realized for hundreds and hundreds of years.