Reminds me of Ruby Weapon. I was in a blind panic the first time I fought it and the party was drained when its HP hit 0 only for the bosses HP bar to fill back up. We managed to win and it was certainly a thrill.
The hero strikes me more as just a self-righteous idiot, the prince is certainly an asshole and the saintess is possibly evil depending on how this plays out.
If it's just a pulling, it's really nothing to be scared of. When i've had teeth pulled, I just closed my eyes and tried to relax. The part that hurt the most was the injections before they started.