(Ahaha you know, I doubt that Prompto had even registered that Noctis was the prince) poor Noctis thinking Prompto ran off because he was mad at him for secret-keeping. :-(

But good for carbuncle for leaving that bruise bread crumb. YOUR BOY IS IN TROUBLE, NOCTIS! GET YOUR DADDY TO HELP YOU! (tho, honestly, I think Regis just might want to hunt Prompto down for breaking his bb's heart haha)