Oooh great question! First of all, your wears fake braces! That’s awesome, I’m pretty jealous! I’d say it has to be the twinblocks with herbst. Little bumps either side of the lower lips from the herbst hinges and the struggle to properly close her mouth because of the blocks separating her jaws… It’d be the perfect blend of humiliating and frustrating for her! Add a facebow or two with plenty of straps round her head for the maximum effect?… Keep us posted with what you choose and whether she enjoys them!