Jay Honestly, I don't remember exactly what I said about Misono. To me, flat is like Rion. The ass cheeks are loose and kinda falling inward. Misono doesn't have a round ass, for sure, but her ass isn't loose. And if she could go back to her body shape when she debuted (with at least -10kg), the shape would also be a little better.
About Alice, here is her ass, standing. Shape of a fat ass, nothing is toned so it's making an angle before dropping.

Jay I don't see her ass in that pic. And she is kinda thick. Thick legs, thick trunk, so of course her ass will be big.