*Marina*
*Shantae*
Wooo! I'm looking forward to seeing custom models of these two. I've never seen a good model of Marina (too obscure I guess?) and the models of Shantae I've seen are either low-poly or too high-quality for games.
My suggestions for Shantae:
-The jewel on her headband is too high up. It is supposed to be centered on the band rather than connected at the bottom.
-Her hair looks great from that first shot, but I bet it doesn't look so great from most other angles. The big challenge with stylized hair like this is finding a shape that looks good from all angles. Case in point: that second image of her makes it look like she only has short hair on her head.
-Her ponytail needs to be bigger and bushier. Right now, its skinniness doesn't make it look very strong.
-Her breasts are protruding out of her chest too much for their shape. The gap you can see under them makes them seem like rigid protuberances. Unfortunately, I have no suggestions on how to improve them.
-The texture on her body is nice so far, but I think some of the muscle-defining shading is too strong. The lines on her back, combined with the size of the shoulders, make those parts of the torso seem unnaturally bulky.
-Don't forget her floaty armband things, which are strangely missing from her original GB sprites but appear in the artwork and later games.
My suggestions for Marina:
-I know her arms are skinny, but I don't think they are that skinny. They are at least as thick as her neck.
-I think you'll have a hard time working with her hands if her thumb is located where it is. In fact, it looks like she can hardly move it at all.
-Don't forget about the round bump things on her shoulders.
Good luck in finishing these!