Luigi

Luigi is a green-clad Italian plumber from the Mario franchise and Mario's younger twin brother. He serves as the deuteragonist of the SMG4 series since the very first season and later shares that role with Meggy Spletzer in later seasons. She is best friends with Shroomy and Fishy Boopkins.

Rather than being a lovable coward sidekick to Mario, here Luigi is often portrayed as a paranoid and easily scared manchild, who is abused and humiliated by his peers. And while he does have awesome and courageous moments, they are normally very rare.