Ritcher and Sonia animish as somebody said, because it is just perfect for 2d.
Otherwise, Maria from the PCE game, because the last time, I have seen a girl character run around in a fancy dress is like "Princess toadstool", and that is a long time ago. i Mean seriously, that is so Project A-ko Blue/Grey Side, where B-ko is running around, kicking ass in an evening ball gown, or even the one scene in "Dominion Tank" where one of the cat sisters, pulled a tommy from her skirt, and the other from her blouse. Everybody else just looks like an Alucard clone, or Simon clone, not including the Genesis Bloodlines.
Maria in Symphony, is kinda bland, or boring. It is just her being a Ninja, but dressed up like a girlish Ritchet/Simon. In fact, you can't even tell the difference between her and Sonia, because she has load of new summons. Maria is just Sonia, in the Saturn/PSX game. Does she even have her Ninja sprite anymore?