Polari is an elderly, blackish-brown Luma who appears in Super Mario Galaxy. Said to be one of the oldest Lumas in existence, Polari serves as Rosalina's most trusted advisor. Having extensive knowledge of the Comet Observatory, Polari serves as a guide of sorts to Mario, showing him a map of all of the galaxies visible from that location.

While Polari's name is never mentioned in-game, and is instead mentioned only in the instruction manual, his name may be derived from "Polaris," also known as the North Star. Polaris was often used by sailors as a guide in navigation, not unlike how Polari advises Rosalina and guides Mario. Conversely, his appearance may be a reference to black dwarfs, which are dead stars.