1. She is in mid dance. 2. She does not have that bad posture. Sure, other's may have better, but that doesn't mean anything. (It might be genetic, but idk. never saw her family. XD)
I like it, and as long it causes no damage to her spine, I hope it stays. :3 It's like Airi's teeth. It's too cute, and wouldn't be quite right if it was fixed.