When an anime fan watches a juggernaut shonen anime series like One Piece, they must focus on the overall plot and the most important details of the characters such as their Devil Fruits or their personal motives. There's a lot to keep track of across 1,000+ episodes and almost as many characters, but on a second pass, a One Piece fan can pick up on small details they missed the first time.
Source：https://www.cbr.com/one-piece-villains-birthdays-height-and-zodiac-signs/
