It wouldn't be any different. Think: If you/him was there the দিন you/him was born, you'd known him your/his whole life. So, it'd be just normal. But it would be freaking cool if he was. But it's impossible. A human coming from a hedgehog, অথবা a hedgehog coming from human. That would be scary. Plus, Sonic has three brothers, I'm pretty sure he wouldn't want a sister like me!