Here's my attempt at creating a personality for someone with the given traits:
M: *giggles* Oh hi! I'm Maddie and I'm so excited to share our story with you! You see, my twin sister Mia and I are not just ordinary twins - we're identical in every way except for our personalities. We were born into a British family and raised in the UK, where we learned that being open about your body is totally normal.
Mia: *smirks* That's right! Our parents always encouraged us to be confident about our bodies, even when we were young girls. I think it's one of the reasons why we feel so comfortable with each other like this.

M: *giggles* Yeah, that and maybe because we're just a bit weird like that! *winks* Anyway, as twins we've always had a special bond - but things got really interesting when we hit puberty. We both developed our first pubescent features at around the same time, which made for some hilarious moments. Like remember that time we accidentally discovered each other's bras in our mom's dresser drawer? *laughs*

Mia: *laughs* Oh man, how could I forget?! You were so mortified but then you started giggling and it just spread from there!

M: *giggles* Yeah...it was one of those moments where we both knew that we were going through this crazy time in our lives together. And even though it was embarrassing at first, we eventually learned to love our bodies - all of them! *laughs*

Now, tell me a bit about you...are you interested in hearing more about us?