From the artist’s Twitter, he writes:
 
女の子になった時に相談しにいったらラリティはめっちゃ親身になってくれるはず  
If I were to consult her about what to do if I turn into a girl, I have a feeling Rarity would take incredibly good care of me.
 
Rarity’s dialogue:
 
“Oh, my goodness! You’ve turned into a girl!  
Yes, I understand. Of course you’re nervous.
 
But, now that I’m here, it’ll be all right. Just leave this to Rarity!
 
First, your hairstyle. Right now, it’s not…bad, but perhaps we can comb it a bit more.
 
Do you have a dress yet? Right, right. I’m sure I can find something to suit you in my boutique!
 
Getting used to using makeup can be fun, too. Let’s go out and buy you a beginner’s set.
 
Wait, have you ever been to a spa? In that case, let’s start with a strategy session in the sauna!
 
Don’t worry! I’ll surely make you into a fabulous lady!”