Luigi is the second and the younger of the two Mario brothers. He is the lover of Princess Daisy. Along with his brother, the two have been through many adventures to save the Mushroom Kingdom and it's many other lands. Both he and his brother share one common trait: they both use power-ups like Stars, Mega Mushrooms, Penguin Suits, Fire Flowers, Ice Flowers, Propeller Mushrooms, and many others. He is also the main protagonist of Luigi's Mansion and it's sequel Luigi's Mansion: Dark Moon.
- He is the adopted uncle of Lilo and Nani Pelekai.