Here is Luigi, of the "Super Mario" and "Luigi's Mansion" series of games.

Luigi is the loyal brother of Mario. Of the two brothers, Luigi is a bit cowardly at times, but despite this, he can manage to pull through in desperate situations.
Luigi's career started off when he and his brother Mario started a plumbing business, and they made this business in Brooklyn, New York. On one fateful day, the two brothers went in a pipe which led them from Brooklyn to the Mushroom Kingdom.

...and so begins the tale of the Super Mario Brothers.

One day, Luigi got a mysterious letter in the mail that said he won a contest that he didn't even enter. Strange, right? Well it turns out that the prize from the contest, which was a mansion, was haunted. This was the work of King Boo and his ghostly minions. Luigi has rescued his brother not once, but twice from these ghosts.