User blog comment:B214/Volume 21 info & spoilers/@comment-95.90.224.210-20160602194640/@comment-1359322-20160603003921

First, Ise is not a Dragon Prince and Dragons don't really have much of a status between them, yes they have classes like Heavenly Dragon and Dragon King but that's all. The classes holds almost zero authority to other Dragons.

Second, that's the fun part of Ise's character, his dream to get a harem and his Oppai Dragon nickname. At least it's way better than Rito and much different from Ichigo or Naruto.

Third, Ise's not dumb, he's just bad at studying. Being bad at study doesn't make a person dumb or stupid, Ise is actually a capable thinker.