Rosalina is a recurring character in the Mario franchise. She is the guardian of the cosmos: she lives on the comet observatory with the Lumas, little star-like creatures who consider her as their adoptive mother, and is responsible for protecting the universe.
She first appeared in Super Mario Galaxy. Later, she is found in many other games in the Mario universe.
Calm and reserved by nature, Rosalina is a lonely character who helps Mario save Peach from Bowser's clutches by allowing him to use the Comet Observatory.