I’m now officially on Team Ursula, and I’m stunned that you and every right-thinking person isn’t with me.
First, I see no good reason to hold a fictional world where people live and speak underwater to arcane bits of American jurisprudence, so the whole “she’s a minor” point is trivial. More importantly, though, Ariel’s world clearly views minors differently since she gets to marry a grown man.
Then there’s your consternation about selling a body part. Indeed there are interesting discussions to be had regarding the sale of kidneys, assisted suicide, or, in this case, selling one’s voice, but it’s certainly not obvious that these acts are “immoral” and should be deemed illegal. But even if they were, we are back to a mere technicality taking down Ursula.
In Ursula’s defense, however, is a concept so robust most people – from legal scholars to the woefully uneducated – would uphold: your word is your bond. Thus, the hysterical, unethical reaction by Ariel and her companions (culminating in murder) is condemnable. Of sound mind Ariel signed a deal – she should have to live with the results instead of getting a bailout from her dad and future husband (future statutory raper, I should say).
Anyway, you are the man and I have learned much from you. I look forward to your next episode.