For rose i have a few things.
1 is i always loved her second ultra in SF4, so i got a commission from Alvin Lee done and i think he drew her perfectly. Instead of sculpting her hair like in the game and SF4, i would go this route in her hair like Alvin drew.
As for the pose, when she is activating her Ultra two you get some nice frames. I think with her having her hands out would be awesome. A bonus would be clear blue resin calls in her hands.
If thats not a option then maybe something like this where she's still a bit sexy but doing her soul powa!