Note: when I played HOD for the first time and didn't know nothing about its story, I honestly thought that Maxim was a woman. I kind of get that Juste was a man, but still his is the most feminine Belmont out of her designs.
And, yes, some of her early characters in Castlevania are feminine. However it's stopped some time around LOI. After that game none of her Castlevania male designs looked particularly feminine. I'd say, they even become looking more masculine with each new installment.