Untitled Jenny Game
- Jack- The main protagonist of the series. He was an eleven-year-old boy who liked playing video games, until he got The Game.
- Pilot Gary- A glitch character in The Game. He was programmed to be a boss, but it turned out he wasn't so bad after all. He is no longer a glitch character in Game Over.
- Jenny- The sister of Jack, who also likes playing video games. She is Jack's guide.
- Jerry- In the first game, Jerry appeared as an invisible man who was the main antagonist of the game. He is turned into a normal human in the second game, and is an ally of Jack.
- Screach- Screach is the final boss of the first game, and wants revenge on Jack and Jenny. It is unconfirmed if she will appear in any future games.
- Errol- Errol is the Glitch King, the ruler of Glitch Town. He was first in The Legend of Zelda series.
- Hurricane's Eye- A duplicate of Jack, who seems friendly at first but turns out to be Jack's worst enemy.
- Ashura- Ashura is the Glitch Princess. She is an ally of Jack and his friends.
- Bagu- Bagu is Errol's friend. He is also a member of the WHATEVER, a force of "lifeguards." He suspects that his boss is evil, and is trying to find out.
- Wechnia- A friend of Ashura, and a police officer of Glitch Town.
- Terry the Koopa- An exclusive character in the Nintendo Silver version of the first game.