For Kawakaze's "call" scenes, you need her affection to be 60/60. Once affection is maxed out, and you have candy in your possession, you can call her for a scene in your apartment. The second dreamworld scene for Kawakaze requires you to have also brought Yamakaze into the dreamworld by giving her a blue mushroom before you enter.
Similarly, for 2B, you need to have her affection maxed out at 60/60 and then proceed to pay $200 for the call scene.
If their affection is not rising above 30 in your game, double check to make sure you have the most recent build. In the older versions of 0.8.3, there was a bug where affection for the both of them was not rising irregardless of how much you gifted to them.
Currently, there are no options for changing the outfits for any of the female characters. Well, aside from taking them off during scenes.....