What are the character traits Dan has in the 39 clues?

Dan Cahill is depicted as intelligent, resourceful, determined, and a natural leader in "The 39 Clues" series. He is known for his problem-solving skills and his willingness to take risks to uncover the truth about his family's history and the clues hidden within. Additionally, Dan is shown to be caring and protective of his sister, Amy, and exhibits a strong sense of loyalty to his family.