Princess Rosalina is a very beautiful magical princess who makes her debut appearance in the game Super Mario Galaxy. Rosalina first appears in the Gateway Galaxy, and she is also the adopted mother of the Lumas. Rosalina commands the Comet Observatory. She is a very powerful figure, as her duty is to watch over and protect the cosmos as well as the Lumas.
Rosalina's back-story is chronicled in her storybook told by her in the Comet Observatory's Library in Super Mario Galaxy. Nine chapters are unlocked throughout the game, and the last chapter is unlocked by completing the whole game. During the story, Rosalina mentions her home planet as "a blue planet"; Earth is also known by this name. She has been a playable character since Mario Kart Wii and was classified as a Cruiser Weight or Heavy Weight character due to her tall height. She has the same biker suit along with Peach and Daisy while riding a bike in Mario Kart Wii and Mario Kart 8. She also appeared in Super Smash Bros. 4 as a playable character where one of her Lumas appears to aid her. She is voiced by Laura Faye Smith.