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.
Legendary Super Saiyan is the strongest form in my opinion. Not Broly but the form. With and endless supply of energy/ki with the right saiyan it would be greater than SSJG or equal to.Goku was 10x smarter than Broly and he was still an idiot, so imagine Vegeta as a LSSJ or Gogeta or Vegito.