There are several explanations that imply and/or may tell that Iris is special, so here are them:
- She is the only princess in the series who doesn't have an "a" in her name.
- Her magical princess outfit is slightly different from the other girls' magical princess outfits. Instead of her signature colour (pink) being below, there is instead white at the top.
- She is the only princess to have 2 symbols (a heart and a four-pointed star).
- Iris is the only one to get a Shanila power-up, unlike the other princesses.
- Her lips are also different than the other main princesses.
- Iris was raised on Earth instead of her own kingdom/planet.
So, what are your suggestions? Let me know in the comments below. :/