However, that is 49 blocks, and maybe you don't want to make that many. Six rows by six, or 36 squares, with three inch sashes and a three inch sashed border would give you more than enough for your queen size comforter, 93 X 93.
5.) Whether or not the character(s) are good to play as is irrelevant. I have come to the assumption that the strongest characters are Super Sayain 4 Goku, Vegeta, and Gogeta, Omega, Nuova, and Eis Shenron, Super Saiyan God Goku, Whis, Beerus, and Super 17.
Dragons, are the weakest, breathing fire which does little damage to a well skilled character. The blood dragon is stronger, so be prepared to use your healing power when fighting one, and then the frost dragon is the strongest. Not only does its icy breath drain your health the quickest, it also drains your stamina.