Hwayugi ..in some ways...
> bad boy
definitely a " bad boy", he's a demon and has not much of a conscience
> the one who show interest develop feelings, fallen in love with her first
he's magically forced to love her, so he's indeed the first to be in love
> she have no interest in him and just doesn't care. She could care less and isn't all ''mushy'' in front him and does whatever she wants
as far as she knows, it's only magic that makes him love her and he doesn't really have feelings for her, this keeps her grounded. since she can control him, she's definitely not "all mushy" for him
> strong,cunning,speaks her mind,defend herself
I'd say she definitely ticks those boxes as well. She wants to live and achieve what she wants