While it might not be a plot twist that kept many awake at night, a notable development from The Super Mario Galaxy Movie (a moderate spoiler follows, so proceed with caution if you’re sensitive to story details) is the introduction of Rosalina and her expanded role. It turns out she is Peach’s long-lost sister, a revelation that involved Shigeru Miyamoto himself.
Miyamoto expressed his satisfaction with this new character dynamic in an interview with the Japanese site NDW, as translated by Bing AI. He commented on the potential limitations of extensive character backstories, stating, “As we don’t know what kind of game we will make next with our characters, having too many character backstories would be a limitation. I don’t mind being limited by the game’s structure, but I don’t want to be limited by having created a story, which is why we haven’t wanted to make movies for years.”
Now, it appears Rosalina’s role within the games is set to evolve. She will be recognized as Peach’s sister, both in the film and in future digital adventures. Miyamoto elaborated, “So, before making this movie, I hadn’t decided on the character’s past, but now that I’m making the movie, it has been fun to develop the character in different ways. That is why I want to stick as much as possible to the settings created in the movie in the next games.”
This sibling revelation has sparked varied reactions among fans, with some finding the sudden sisterly bond between the two characters unusual, while others are embracing the new narrative direction. What are your thoughts on this newly established sisterhood?

