Luigi

Luigi is the secondary main protagonist of the series and Mario's younger brother. He debuted in The Adventure Begins!.

Appearance
Compared to Mario, Luigi is slimmer and taller. His face is noticeably thinner, his eyes are slightly more bluish, and his hair is the same style as Mario's, but more of an auburn or dark maroon. Luigi's mustache is dark brown, sometimes black, and smooth, unlike Mario's ragged mustache.

Luigi also wears clothes similar to Mario, but his shirt and cap are green instead of red. Layered over the shirt is blue overalls, which are a darker blue than Mario's. He also has brown work shoes, again darker than Mario's, with tan bottoms that reach above his ankles. However, Luigi has the same color of blue overalls and brown shoes as Mario.

Personality
Luigi is portrayed as timid and a bit of a coward. He is also extremely worrisome and is considerably self-conscious. However, he overcomes his fears and acts like a hero when necessary, such as when someone he knows is in danger or needs help. Unlike Mario, Luigi is normally knid and forgiving.

Abilities
Luigi's abilities are usually exactly the same as Mario's.

Fireballs
Just like Mario, if Luigi swallows a fire flower, he can emit green fireballs from the palms of his hands.

Spinning Tornado
When Luigi holds his hands out and spins really fast, he can turn into miniature tornado for about 30 seconds.

Mario
Luigi is usually on good terms with his brother and often acts as his sidekick on rescue missions. Though, Mario sometimes looks down upon his brother.

Daisy
When Daisy first visited the Mushroom Kingdom, Luigi had a huge crush on her. The two are very close friends and Daisy seems to be unaware that Luigi has a crush on her.

Yoshi
Yoshi is Luigi's best friend. They hangout a lot and even booked a hotel room together.

Luigi first met Yoshi when he was a baby who just hatched out of an egg. The first person Yoshi saw when he hatched was Luigi, so he often calls him Mama Luigi.

Toad
Toad is one of Luigi's good friends. They often hangout a lot, though Luigi is usually very unaccepting of Toad's perverted ways.

Waluigi
Waluigi is Luigi's main rival. They often argue and always play against each other.