Understandable, but considering the "seductive pose" of a Mermaid (There IS a Mermaid as well, in the game!) the knee-bend is usually required if they're sitting up or leaning, for the sake of balance. Otherwise, they're usually best when they're splayed out on a smooth surface, such as a moss-covered rock. But I might be going into "Siren" territory. Both are very similar at times.Edit: Got the Mermaid:All characters have 5 "forms"; you're seeing their final forms, when they're fully leveled. Rank N, or 1 Star, means there's no porn scene with them. Hence her design being the way it is.