Girls can be black belt The character is not trans

Mmm nope

Black Belts are male exclusive and Beauties are female exclusive ;)

“In the Kalos Battle Maison, Beauty Nova is implied to be transgender. She mentions that she recently remade her life completely, and that she was reborn as a Beauty after being a Black Belt (a male-only Trainer class) half a year ago. When the language is set to Japanese, she credits this transformation to medical science.[2]

• Before battle: “I’ve recently remade my life completely! I’ve been reborn as a Beauty at last!”
• If victorious: “If you want to make your dreams reality, then you have to be completely dedicated!”
• If defeated: “Yes, a mere half year ago I was a Black Belt! Quite the transformation, wouldn’t you say?”“
  

(go to trivia)