DeGrey's ghost is decent against dragon Midori to waste some time as it can whiff punish any over aggressive move, but not much else.
Setsuki's projectile isn't that good against Midori from my experience as his airB beats it. That said, my Setsuki's mediocre at best, so maybe there's some tech that helps with that and I just don't know.
Finally, Rook I find doesn't beat human Midori that much as, as I've said somewhere else already, Midori can react with C to most things Rook does to get in. And if he doesn't get in or takes too much time to do so and Midori builds his Super, Rook is going to have an incredibly bad time.