User blog comment:KurosakiHisana/Siren Academy - Yay or Nay?/@comment-24857097-20141115223140

For starters, Beacon is one of those college-level combat academies. I think that if you revise the stories to where that Siren Academy was high-school level rather than college-level, then you would probably have a chance of salvaging whatever is left. There are many fanon-created high-school level academies and they're accepted since they're like real life high schools.

You mentioned a fifth kingdom. Since we don't have ANY information regarding this fifth kingdom, it's an automatic rejection because the point of getting the RP Seal of Approval, you gotta stick with canon information to keep it canon-friendly.