>>41116365Maybe I'm misunderstanding you, but I'm not sure what you're getting at.
In terms of game development, you shouldn't model what can't be seen. For example, Sonia has no arms in that image because they're always covered by her coat. They can never be seen, so they're not modeled, even though she's canonically supposed to have arms. Similarly, even though Hatterene is supposed to have legs (in lore), they can't be seen ingame due to that dress thing, so there's no practical reason to waste time modelling them.That's why I'm confused about OP's image.
I guess it may be like the other anon said, and it was made that way so the legs were available in case they ever needed to be shown in the future. Or maybe an earlier design had the legs visible, but it got changed and the legs were never deleted.