NOTE: You do not have to make every line energetic, Luigi will not just be saying one liners but instead will be holding conversations.  Luigi shares some of his brother's traits like being good However, Luigi is more quiet, shy, fearful, goofy, and naïve. It's no secret that Luigi has been in Mario's shadow his whole life, so for him, this is a different story. Yes, he wants to save the princess but he also wants to prove to himself and everybody, especially his brother, that he can pull his own weight.