Rosalina

"Rosalina is a youthful-looking woman whose appearance highly resembles Princess Peach. She has platinum blonde hair, styled into a bang that covers the majority of the right side of her face. She is also noticeably taller than Peach, and most Mario characters in general. Rosalina's attire consists of a turquoise empire waist dress, with tapering sleeves and a low neckline that exposes her shoulders. Her earrings and brooch display star-shaped motifs, and she wields a wand which also sports a star-shaped motif on its tip.

Rosalina debuted in Super Mario Galaxy, where she is a major non-playable character. She commandeers the Comet Observatory, which visits her home planet once every century, and functions as a home for both herself and the Lumas. Her backstory is detailed in a storybook, which she reads to the Lumas at various points during the game. The storybook reveals that Rosalina first journeyed into outer space to help a lost Luma find his mother, which eventually led to the duo building the Comet Observatory together, Rosalina coping with the **** of her own mother, and subsequently forming a new familial relationship with the Lumas as their adoptive mother."

-Via SmashWiki