Dancers do, in fact, have skills. Just go to any wiki and check that class, or check out the Songstress Dressphere from FFX-2. That dressphere has both Dancer and Bard skills.
Most of its dances inflict statuses on enemies, though some give positive effects to allies.
No offense, but your cahracter is pretty useless. This RPG is party oriented, so you can socialize, but it is also about going on a quest and saving the world. Having a party member who can do nothing and is just a hindrance would not be a very good idea.
Sorry, but as it is, if I were Ysa, I wouldn't accept that character...