Luigi is Mario's thinner, younger, and taller brother. He often helps out in protecting the Mushroom Kingdom from Bowser and other villains, he is normally a secondary hero, a second player, and a deuteragonist, but he has also been the main character of his own game in Luigi's Mansion and it's sequel Luigi's Mansion: Dark Moon where he rescues Mario from King Boo. He also had a little known role in the PC game Mario is Missing which is the first official game that he was the star of. Luigi also has his own rival Waluigi and his own love interest, Princess Daisy since Mario Tennis for the Nintendo 64.