Super Mario Galaxy/Characters

Mario
Mario is the greatest hero in the entire Mushroom Kingdom, a plumber who's traded in his wrenches for travel to the far-flung corners of the universe. In his latest adventure, Mario must chase his nemesis, Bowser, across the cosmos to rescue the fair Princess Peach. While soaring through the heavens, Mario encounters all the fantastical wonders of space, from strange comets to imaginative planets. He must also wrestle with one of the greatest forces in the universe: gravity. If Mario can use gravity to his advantage, he might stand a chance against the tricks and traps Bowser has left in his wake.

Luigi
Luigi is the person that takes Mario's place when you beat the game with 120 stars. Luigi is basically like Mario except he can jump higher and it is harder to get him to stop when he is running.

Bowser
Bowser is the great fire-breathing villain of the Mushroom Kingdom, a dastardly creature bent on capturing Princess Peach and taking control of the kingdom for his own nefarious means. He commands a vast army of Goombas, Koopas, and other nasties that do his bidding without question. Mario always manages to save Princess Peach from Bowser and stop his schemes, but the brute never learns. Perhaps if Mario finally corners Bowser in the heart of the cosmos, he can pound a little sense into the scoundrel.

Princess Peach
Princess Peach, benevolent ruler of the Mushroom Kingdom, has been friends with Mario for years. In her times of need, Peach can always rely on Mario for help. When Bowser kidnaps Princess Peach and steals her across the galaxies, she is separated from he trusted Luma. Hopefully, the Luma will help Mario rescue fer from Bowser before the fiend can hatch whatever grand plot he's cooking up aboard his incredible fleet of airships.

Rosalina
This Keeper of the Comet Observatory floats through the cosmos with curious star creatures, called Lumas. Her past is shrouded in mystery.

Polari
This elderly Luma is Rosalina's most trusted advisor. He knows all about the observatory, and if you speak to him, he will show you a map.