It's true, one should stick their leg out in a dip. It's a pose that highlights the lines of the body in a dynamic fashion. Also Ginia has seen Hibiki dance enough to know a leg kick is inevitable. It's the hallmark of every performance, live or in CG motion capture.

When in the company of a Preek god, do as the Preeks do and raise a leg?

Ginia is also wearing a short dress and not interested in flashing everyone. So while raises a leg in an elegant fashion, she keeps her thighs pressed tightly together and doesn't raise her leg as high as she could so her dress doesn't slide back too far.