I'l copy/paste the question and the answer i got. Dont know if there's a better way to write it here.
Here is the question i asked:
"Rules Question:
Hi. First of all, congratulations and thanks for this awesome game. In my group we have a question and couldn't find an answer in neither the rules nor the forum: When you activate a character that already has one or more of its associated dice in the pool (lets say, a just readied Bala-Tik or someone readied by Leadership), do you roll the dice in the pool too? Some of us think that this would be a reroll, not a roll, and should remain in the pool. Others think that, since the rules instruct you to roll ALL associated dice, those should be rolled too. Thanks!"
And here's the answer:
"Willy,
Thanks for the question. Whenever you activate a character, you roll any of its dice that are on that character. Dice in the pool remain in the pool and are unaffected. Before activating a character like Bala-Tik again, you could spend his dice in your pool so that he could roll more of them.
May the force be with you,
-Lukas"
But what about the blank's? You cannot resolve blank sides, so are they stuck in the pool?