SuperMemeGuardian4 (SMG4), formerly known as SuperMarioGlitchy4 (or Glitchy until WOTFI 2021), is the titular protagonist of the SMG4 series alongside Mario. As Mario’s guardian, closest ally, and occasional rival, SMG4 acts as the voice of reason amid the chaos. He’s the unofficial leader of their gang and was once SMG3’s nemesis. Passionate and protective of his work, he often finds himself frustrated by the absurdity around him. Despite this, he and Mario are the heart of a growing group of friends who take on wild adventures and major threats. He wears a blue cap and shirt, white overalls and gloves, and brown boots, and has black hair and blue pie eyes.

Mario is the main protagonist of the SMG4 series alongside SMG4, and the most prominent character overall. He’s a chaotic, idiotic, and overly confident plumber who constantly gets into bizarre adventures with the SMG4 Gang, often alongside Luigi, Meggy, or SMG4 himself. Known for being a spaghetti-loving goofball, Mario thinks he’s cool and popular—somewhat true, thanks to his fan club—but in reality, he’s an attention-seeking menace with a long history of absurd, often inappropriate behavior (mostly played for laughs and now toned down). Despite his flaws, Mario is protective of his friends and central to the group’s dynamic. He was once SMG3’s rival and is the avatar of his universe—meaning if he dies, his universe goes with him. Physically, he’s short, very fat, and wears a red cap, red shirt, blue overalls, white gloves, and brown shoes. He has blue eyes, a black mustache, and brown hair, and is shorter than Luigi.

Meggy is a competitive and athletic member of the SMG4 Gang, known for her bravery, determination, and level-headed nature. Originally an Inkling from Inkopolis obsessed with winning Splatfest, she bonded with Mario after escaping a paint can and competing alongside him. After moving to the Mushroom Kingdom in SMG4: Meggy Moves In, she became one of the group’s most capable and grounded members, playing a key role in the Anime Arc. At the arc’s end, Meggy was transformed into a human after the Ink Zuccer 2000 drained her ink. Now taller with ginger hair, freckles, and red-brown eyes, she retains her original gear with updated designs. As a human, she’s no longer vulnerable to water but also can’t turn into a squid. Meggy is smart, spunky, and caring, though she can be trigger-happy and overly competitive, especially about Splatfest. She graduated from Omnia Academy with a law degree and never gives up on her goals, even if she sometimes pushes herself too far.

Fishy Boopkins is one of the three tritagonists of the SMG4 series, alongside Bob Bobowski and SMG3. A goofy, cheerful sea creature and proud otaku, Boopkins is one of the last of his kind. He’s a huge anime fan (especially waifu pillows) and often tags along on adventures with the SMG4 Gang, especially his best friend Bob. Although once a major character, Boopkins’ screen time decreased significantly starting in Season 11 due to a shift in focus to newer characters. He now appears mostly in ads and openings, but remains a fan-favorite for his light-hearted nature and quirky humor.

Bob Bobowski is one of the three tritagonists of the SMG4 series, alongside Fishy Boopkins and SMG3. A lazy, idiotic Garo and member of SMG4’s Gang, Bob is best known for his trashy humor, selfish attitude, and chaotic behavior. Though he started off as arrogant and fame-hungry—especially during The Rapper Bob Arc, where he betrayed his friends to become a rap star—he eventually redeemed himself with help from Waluigi and rejoined the gang. Despite his antics, Bob has become a lovable wildcard, often bringing comic relief to the group. In the Remastered64 series, he keeps his original Garo model for continuity, though his speech is now clearer and subtitled for easier understanding.

SuperMemeGuardian3 (SMG3), formerly SuperMarioGlitchy3, is one of the three tritagonists of the SMG4 series alongside Bob and Fishy Boopkins. Originally a major antagonist in both the Classic and early Modern eras, he became a key ally during the Genesis Arc, helping fight Niles/SMG0. SMG3 was originally meant to care for dead memes in the Internet Graveyard before Niles’ interference. In SMG4: REVELATIONS, he sacrificed Terrance to help save the universe, later adopting a pet Eggdog. After a period of limited appearances, SMG3 returned to prominence in episodes like MARIO BALLIN?!?! and SMG4: Are You Ok?, eventually rejoining the main cast and stepping up while SMG4 was focused on his “perfect video.” He wears a purple shirt and cap, black overalls with gold buttons, has red pie eyes, black hair, and a beard.

Tari is a major character in the SMG4 series. She’s a shy, kind-hearted gamer with a love for video games, rubber ducks, and cats. Though timid and non-confrontational, she has incredible gaming skills and is surprisingly proficient with weapons due to her cybernetic left arm. Despite being clumsy, accident-prone, and not very athletic, her arm gives her bursts of superhuman strength and quick reflexes, especially in games. Tari is polite, often apologizing unnecessarily, and tends to avoid conflict—but when push comes to shove, her inner strength and skills shine through.