“My mama!” —Luma Super Mario Galaxy. Lumas are a star-like characters in Super Mario Galaxy and Super Mario Galaxy 2. Lumas aid Mario in his quest across the universe, and can transform into various forms. Lumas are shaped like stars, yet they have a rain drop-like shape. Many Lumas call Rosalina "Mama" and live on the Comet Observatory with her. Many different types of Lumas exist; perhaps the most generic form of Luma is the yellow Luma. Other types exist as well, such as red Lumas and Green Luma. Each type of Luma has a different ability. A Luma appears in Mario Kart Wii if you play as Rosalina.