Rin Tosaka. Gender: Female. Age: 16. Hairstyle: Twin tails. Fused with her former Lancer servant, she can use Lancer's powers. Supports combat using various magecraft (Codes). Personality: A tsundere, but a straight-laced woman with a strong core. Goal: Escape from this world.

Transformed into Dark Decade from the start. A Kamen Rider. Can use the powers of all Nega Riders. Can use powers without loading cards into the belt. Finishing move: Dimension Kick. Personality: Cruel and cold-hearted, but prone to oversight, which is always the cause of defeat. Rider Cards are stored in the Ride Booker on the side of the belt; the Ride Booker can switch between Sword and Gun modes. If he realizes he cannot win, he uses the Invisible card to escape. Wish: To become the strongest Rider.

Personality: A bratty character who easily gets carried away and acts selfishly. Finishing moves include Rider Sting, where he flips the bee-shaped Zecter on his Rider Bracelet to pierce with the stinger, and Needle Gun, a long-range move that fires the Zecter's stinger. However, he is generally weak because he fights primarily like a boxer with punches. Starts in Masked Form, but by performing a Cast Off, he enters Rider Form and can use Clock Up to move at high speeds within a limited timeframe by entering a state of accelerated time.

Personality: Affected and cynical. Reduced to a pawn after losing to Odin. White hair, tanned skin, height 185cm. His red cloak is tattered, revealing a black inner suit with white lines. Basic tactic is to snipe persistently with a bow from high ground, but switches to dual swords if approached. Uses Projection Magecraft to generate and fire dozens of swords. Can use Rho Aias, a flower-shaped magical shield strong enough to block Noble Phantasms.

The Golden Rider. Possesses Time Vent and three Survive cards (one of which is a cheat). Deck consists of Sword Vent (summons two sabers), Guard Vent (summons a shield), three Survive cards, Time Vent, and Final Vent. Fights to bring his sister back to life. Personality: Cruel, cold, and cunning. A participant in this game. Contract Monster: The golden Mirror Monster, Goldphoenix.

Fights to stop the fighting. A fortune teller. A fine young man. Personality: Kind and dependable. Deck consists of Swing Vent (summons a whip), Advent, and Final Vent. Contract Monster: Evildiver. His transformation never disengages. Does not reveal his real name.

The King of Uruk. Class: Archer. Fights by launching the prototypes of all Heroic Spirits' Noble Phantasms. Clad in golden armor. A demigod. Personality: Constantly arrogant and cold-hearted. Often loses battles he could have won due to his own hubris.