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.
In the fifteenth movie, Whis is seen training Goku and Vegeta for the fight against the resurrected Freeza; effortlessly defending himself against the two. The original author, Akira Toriyama, stated that Whis is currently the most powerful character in the Dragon Ball universe.