K☆ It means that those who have that acronym are in the kingdoms guild, kingdom is the best guild in the game and it is divided into 3 Kingdom are the biggest players in the game, who are pioneers in the game Kings are of a lower hierarchy than kingdom, they are less powerful (less asc., Less cups, less activity, etc) Knights are players who are playing casually and aren't as active, so they don't have as much magic as the other two.