User blog comment:SingMeloetta/Theory:Where is Elza From?/@comment-3487190-20170618154425

Uhm well... I see this is a very detailing research from the story. But still remember to think in BANDAI's view, they must avoid to actually mention any known royalties or celebrities from the real world. It's pretty different from that Kirara just grew in a different country since there are thousands of immigrant families in the real life. Elza is a heiress that'd become a queen of a certain kingdom, but she cannot be the queen of Belgian or England cause that'd be BANDAI trying to find troubles for themselves.

A similiar example is like BANDAI/TOEI's Pretty Cure the Happiness Charge series, it introduces Blue Sky Kingdom where the main character comes from and it exists on Earth but this is a canon different from the real world and we know it doesn't exist.

I would say this can be a good research about Elza's character design and references. But it won't be used as a prediction of the story.