Rayfa, and she would be the only reason to want to return to SoJ stuff if they venture there in future games or cases. Rayfa and Phoenix was pretty typical tsundere/clouded naive girl banter, but very charming. Her gimmick is pretty neat, and I never got tired of seeing the full dance each time. The singing in the background gave me GITS vibes.
"Evening caress, Always yearning, I must confess, The stars aren't burning"
Copernicus - Candlemass