What does a cartoon with a black hat and a black mask mean?

Luffy's hat has been worn since he was a child, which means a lot to him, so I believe that even if he loses his life one day, he will never give up this hat. This hat originally belonged to Roger the One Piece, but it was later given to Red Head. The red hair was very kind to Luffy, and then he gave Luffy his hat and agreed to return it when Luffy became a One Piece. So this is never a simple hat, but an agreement between Luffy and others, an emotion and a sustenance. It is also a classic in our hearts.