Rai is a gal who likes things tight, but she won't allow just anyone to tie her without proving himself by surviving one of her training sessions first. Once that's done, use plenty of rope and tie her to a pole or chair to give her the tightness she wants. Use microfoam tape or a latex OTM for her gag. She refuses to disclose her weak spot as she sees doing so as a sign of her own personal weakness. Fortunately, her legs and hips are both nice to look at and touch, so rub away once she's fully secured. She won't mind too much so long as her tie is tight enough.
