User blog comment:RoyallyBella/Official Season 6 discussion blog/@comment-5989752-20131108235434/@comment-27111026-20131110110317

@Brit: Ah-hem! Brit, we're from Earth, too! What's wrong with being from Earth? Iginio and Nick had forgotten about Earth and Earth fairies, and Tir Nan Og, and Roxy, and I have enough with it!

@Harmi: IKR? I thought she's from somewhere else, but another proper explanation is because the creators want to save the time creating another realm/planet like how they did with the characters...