Inspired by a quote from the Frozen artbook, I wanted to make a list of the fairy tales I know that feature sisters and stepsisters with good relationships.
And a couple of honourable mentions:
- Kisa the Cat (content note for mutilation). In Lang’s version the main characters aren’t sisters, but it appears that they are in this Icelandic version (although I’ve only been able to read it with google translate). The story bears some resemblance to Biancabella and the Snake. ETA: I’ve found several more Icelandic versions that are easier to Google Translate; they’re all about sisters.
- Fairer than a Fairy (Four and Twenty Fairy Tales page 183). The two princesses aren’t sisters but they become great friends, and do become family by the end.