Male. A person who is a living weapon. Presumed to be the strongest after Axol. The current villain of 2025.

Male. A villain wielding the Staff of Rejection. He grows stronger the more he is rejected. He was the villain in 2018.

Male. Literally a lawyer. A villain who appeared to file a copyright claim against SMG4. He was the villain in 2022.

Male. As you can see, he's a total otaku. He loves anime intensely. He was the villain in 2019.

Male. Presumed to be the strongest character in SMG4. He is massive, has no legs, and half of his body is skeletal. He was the villain in 2021.

Male. A cardboard doodle made by Mario. Despite being cardboard, he has a consciousness. He cannot speak or move on his own; he communicates via radio and moves using a wheelchair. He was a villain alongside Mario in 2023.

Male. Species: Super Meme Guardian. He loves memes and is a famous YouTuber in reality, but in this virtual world, he is an unknown YouTuber. He appeared briefly as a villain in the 2023 Saga Movie. He is the protagonist and an ally in the SMG4 universe.

Male. Species: Super Meme Guardian. A bomb enthusiast who runs his own bomb cafe. He is a streamer and the owner of the Internet Graveyard. He appeared as a villain in 2020. Originally SMG4's rival, but they are currently on friendly terms. He is a protagonist and an ally in the SMG4 universe.

Male. A stupid human. A silly and eccentric yet cute character. He is actually somewhat smart. The one who created Marty. He is friends with SMG4. He was a villain with Marty in 2023. He is a protagonist and an ally in the SMG4 universe.

Male. TV Head. Due to parental neglect as a child, he locked himself in his room watching TV every day, eventually cutting off his own head and replacing it with a TV. He can use all abilities. He was the villain of 2024 but is now an ally of SMG4.