KIEN
As I finished the book, at first, I thought Mai was the main character. But when Kien came into the story, he became the main character of the story. As the story went on, much of the story focused on Kien and also many characters depended on Kien. When Kien, grandpa, Mai, and Loc depended on Kien to survive in the sea. I think if there wasn't Kien, the story should be less fun and Kien was brave in this story.