Okay… This sounds weird, right?
In Frozen, Elsa and Anna ARE sisters. But Elsa and Rapunzel from Tangled are the only Disney princesses who have powers. So are Elsa and Rapunzel actually sisters? The answer is yes.
The theory is that Elsa and Rapunzel are twins. That creepy Mother Gothel stole Rapunzel for her hair, and Elsa’s and Rapunzel’s parents were scared. They didn’t want anyone to steal Elsa, so they sent her to the neighboring kingdom of Arendelle. Elsa grew up thinking that Anna was her sister, but her sister is really Rapunzel. Just think about it.
Also, Elsa and Rapunzel have kind of the same story. They discover a new power at the end of the story that can heal.
So, Elsa and Anna are NOT sisters.