Aschen has a dual personality so try and trigger her Fun Mode before offering to tie her and the experience will be far more pleasant for both parties. Regardless of what mode she's in, heavy restraints and ones that hug her curves will work and look the best on her. Despite being an android, she does have a few weak spots: namely her butt and the back of her neck. Keep that in mind when gagging her as stroking her hair at the same time as brushing the back of her neck will give the best results except if a gag gets in the way in the back. So long as she continues having fun, there isn't a need to worry about revenge.