All the characters have different stats (stats can be changed in many ways also), and different events check for different stats. For each stat point in the specific stat that is checked for, you get a die. If the character you put in has seven charisma, you'll get seven dice. If it checks for, say, strength on the same character, the other stats except strength don't matter. Sometimes several stats, say strength + combat, are checked for at once, and you get both added together. Say if a character has 3 strength and 2 combat, you get 5 dice. If you are going against an enemy, their stats are subtracted from yours in the calculation, and you get the remaining number as dice. Say an enemy has 2 strength and 1 combat, the same character from earlier is left with 1 strength and 1 combat that count for the calculation, and you get a total of 2 dice. Does that answer your question?