Dragged into Drag: Hikari when she enrolled into her ballet class at the tender age of three, because one of the new male students (Rintaro) chose to take all his lessons in drag. She quickly got used to it. Kassarin, who exclusively wore unisex clothes her entire life and went to a non-uniform junior high school (her grade school didn't use a uniform either), enrolled at Kingyo as a girl but got the boys' uniform without even requesting one as her reputation as a skirt-hater was already well-known among the staff for some reason and they just felt like catering to her fashion tastes.
Kassarin: I thought this series was called "Pretty Cure Classics"? Shinichi: Yeah, so? Kassarin: Why are we delving into more modern materials? Shinichi: How is it best expressed? "Too much of a good thing can be bad for you?" Ah, what the hell? What I'm trying to say is, sure, we like to do the classics, and that makes up the bulk of our repertoire, but every now and then I get in the mood to do something more, um... Kassarin: Modern. Shinichi: Yeah, modern! But I do see your point, Miss Otonashi.
Leotard of Power: Rintaro does this quite a bit. Cure Wood also does this, but since his leotard is made of satin (which is inflexible) the only way to change into or out of it is by transforming. Cure Charisse, on the other hand, wears a Unitard of Power.
Meganekko: Both Rintaro and a biological girl, Hikari, count as this, and Hikari is a semi-Bifauxnen example. Both also retain their glasses as Cures. Also, Hochu (who otherwise almost never wears glasses) inexplicably wears glasses as Cure Wood.
Of Corsets Sexy: Part of Cure Hepburn's costume. It doesn't show much skin, but a small portion of her midriff shows below that corset.