SMG4

SuperMemeGuardian4 (formerly known as SuperMarioGlitchy4), colloquially known as SMG4 or Four, is the main character and one of the two protagonists (alongside Mario) of the series of the same name. He is Mario's guardian and closest ally (rival in the 'War of the Fat Italians' series), the de facto leader of his gang, and the former nemesis of SMG3. Passionate and protective of his work, he acts as the sane man who is often annoyed or surprised by Mario's idiocy and the world's madness.

Mario Mario (also known as Mario Gaywalker and Mario the Sexy Plumber) is one of the two main protagonists along with SMG4. He is based on the eponymous character from Nintendo's Super Mario franchise. Mario is often portrayed as a goofy, morbidly obese spaghetti addict. While he thinks he is popular, he is actually an attention-seeker.

SuperMemeGuardian3, colloquially known as SMG3 or Three, is a former antagonist turned main character. He was the main antagonist during the classic era and is SMG4's former evil double and archenemy, originally discovered trying to copy SMG4's videos.

Meggy Spletzer is one of the two deuteragonists of the SMG4 series and the lead protagonist of her own spin-off series, Sunset Paradise. She is a highly competitive athlete in SMG4's gang and a Splatfest champion who protects her friends and herself from danger.

Tari is one of the three tetratagonists of the SMG4 series. She is a major character who has appeared in numerous story arcs and films, including the Waluigi Arc, the Rapper Bob Arc, and the Genesis Arc.

Luigi Mario (also known as Luigi Luigi or simply Luigi) is one of the two deuteragonists (alongside Meggy Spletzer) of the SMG4 series. He is a cowardly Italian plumber dressed in green, Mario’s twin brother and sidekick, a kind-hearted citizen of the Mushroom Kingdom, and a loyal member of the SMG4 gang. He has lived through many adventures over the years and is usually there to deal with Mario’s antics. Luigi is often a paranoid and easily frightened man-child (especially of Boos), who is frequently humiliated by his peers. He used to be the subject of teasing and bullying.