idk
to protect herself? im not sure she chose to be a villainess cuz they tend to be on the losing side. But in the manga, it show how she was painted as the villainess by her half sister (she was going it on purpose as shown) and lost to her and put into brothel. realizing what really happened, she wanted revenge? in anywise when she went back in time, she wanted to be a perfect villainess with no flaws. but I see it as her masking who she is to protect herself. not really being a villainess, she's acting like she's the pure lady then anything. like her sister disguised herself as.#－.－)
Ok, this makes sense. Thanks for the explanation (*つ▽`)っ♡
your welcomeee (=・ω・=)
Why does pur pretty lady wanna be a villainess? I forgor