Bu uses pheramones to punish Genma making herself look like Nodoka to blow him then turning to ukyo in front of nodoka or kasumi
Bu uses pheramones to keep happi at bay while trying to seduce akane, akane unlocking happis technique.
Happi wants akane to take a tuft of Bu's pubes for a magic to control her. The tail hair is what he wants but when focused while shape changed the tail folds up to the pubes. The the hairs, it might be possible to suymmon the star jewel, a magic ball of power which holds part of her magic, including the power to return to a big fox form.
Possibly releases the spirit as a danger who then Ranma and co can tag team.