This match up is retarded. You have to pick and choose your spots to try and j.B, so no going ham in this one until you actually have an advantageous position. Mitsuru's 2B will fuck your face. You've got to out footsie the character that has some of the best normals in the game. If she's pressuring with low pokes on your wakeup, you can throw a Furious Action out to stop her, but then please keep any eye out for throws because that only works once or twice (with most opponents actually). And for the love of god don't charge your Furious Action when using it as a reversal.
You need to familiarize yourself with how Mitsuru works so you know what's coming. The A Version of her "dash punch" move thing is either Equal or Plus on block. But it doesn't matter because all of Mitsuru's normals are faster than yours. If you like guessing, have fun. Mitsuru can go low, high, or throw. Just gotta be patient and look for an opportunity to get some space and try to bait/punish. Breaking a throw is excellent for that.
That's all I remember for now.