Rosalina

Rosalina, known as Rosetta (ロゼッタ, Rozetta) in Japan is the adoptive mother of the Luma race and overseer of the Comet Observatory; she was voiced by Mercedes Rose. She first appeared in Super Mario Galaxy for the Wii, and has also appeared in Mario Kart Wii as an unlockable character. In this game, Rosalina wears a silver crown, has platinum blonde hair with a side-fringe, a frilly light blue dress, and carries a wand. When she is driving, a small Luma floats around near her head. She looks exactly the same in Super Mario Galaxy, except she carries a star wand. Rosalina appears in a non-playable role in Super Mario Galaxy 2, and a "cosmic" version of her appears as part of the game's 'Cosmic Guide'. At the end of the game, after Mario saves Princess Peach, Rosalina comes in front of Starship Mario and thanks Mario for saving her lost one and the universe.

In Super Mario Galaxy, the player may optionally view Rosalina's shrouded past in the Comet Observatory's Library through unlocking chapters of Rosalina's storybook, while progressing through the game. The mysterious storybook read by Rosalina herself details how she came to meet the Lumas and build the observatory, as well as her childhood struggle to overcome her mother's, father's, and brother's deaths. In a review, GameSetWatch said that "some players won’t care about or connect with Rosalina’s tale," but that is all right since the game separates the story from the gameplay. They also say they can argue that "Super Mario Galaxy is, at its core, a game about Rosalina – or at least her worldview," as finishing all of the objectives in the game gives the player a secret ending about her.

In Super Smash Flash 2, she's a background character. Around her, there is a floating star. She isn't a Hazard. She appears on stage Galaxy Tours; in the area Comet Observatory, the menu.