Appears only when mobs like thugs, yankees, or delinquent students show up. Only Guest can perceive Hyper Merciless Senpai. When mobs intrude, he appears and takes them away, saying, "I'll show you an ending befitting a mob!" He says nothing else but that phrase.

Official name: KamenRider Hyper Muteki Ex-Aid. The eldest son. Abilities: Hyper Invincibility: Takes no damage from enemy attacks, completely nullifying them. Limit Break: Speed and power are constantly maxed out, displaying overwhelming combat strength. Auto-Counter/Knockback Immunity: Acts while completely ignoring enemy interference or flinching. Pause/Restart Nullification: Completely cancels out special abilities like time-stopping.

Official name: Kamen Rider Zero-Two. The second son. Abilities: Super-High-Speed Calculation: Instantly performs over 2 trillion calculations, deriving the optimal solution to enemy attacks in 0.01 seconds. Dimensional Quantum Transition: Deploys multiple possibilities into the same world, achieving an effect similar to creating clones.

Official name: Kamen Rider Geats IX. The third son. Abilities: Power of Creation: Creates desired worlds or events at will, nullifying enemy attacks or instantly restoring destroyed buildings and terrain. Event Acceleration: Through the "Geats Tail Nine" cape, accelerates his own combat speed and the restoration of objects/buildings beyond all limits. Power of Words: Through the "Kannagi Crush" mouthpiece, imbues words with mystical power to toy with opponents through speech alone.

Official name: Kamen Rider Zets Ex-Dream. The fourth son. Abilities: Event Redo: Can redo past choices and events until reaching a possibility where he wins. Dream Atomizer: A device that combines energy from the driver with the user's feelings, converting them into various "powers to grant dreams."

Official name: Kamen Rider Cronus. The parent of Otaku and Chi-nosuke. Can use the time-stop command called "Pause." He is exasperated by how incompetent his two sons are and deeply regrets it. He used to be at odds with Ex-Aid and the others, but now they get along normally. He is a good parent who feels sorry for the trouble Otaku and his brother cause Ex-Aid.

Cronus's son. Can't do anything. Hated by everyone, but is romantically in love with Suisei. Self-centered, filthy, cocky, and picks fights with strangers for no reason.

Cronus's son. Can't do anything. Hated by everyone, but is romantically in love with Suisei. Self-centered, filthy, cocky, and picks fights with strangers for no reason.

A buff, muscular high schooler from the neighborhood. Has no special abilities but is incredibly strong, able to go toe-to-toe with Ex-Aid and the others. He has a mild and kind personality but is a man who can get truly angry for the sake of others.

An ordinary person.