Luigi

The younger brother of Mario.

El Hermano De Bing
Mario's often overshadowed brother who only gets attention because he's related to the Mario.

Season 6
Unlike his brother, Luigi is cold and calculating in his approach, and rejects The Three Kings' ways, looking to join the faction of BANS Army instead. Although some say he might have secret motives...

Episode 9

Joins TFR Underground in hopes of reaching the higher ranks of the army.

Trivia

 * The L on his cap stands for "Legendary"