Appears only when generic thugs, punks, or delinquent students show up. Only Guest can perceive him. When mobs intrude, he appears and takes them away, saying, "I'll show you an ending befitting a mob!" He never says anything else.

Official name: Kamen Rider Hyper Muteki Ex-Aid. The eldest son. Abilities include: Complete Invincibility (takes no damage and nullifies all attacks), Limit Break (speed and power are constantly at maximum), Auto-Counter/Knockback Immunity (ignores all flinching or interference), and Nullification of Pause/Restart (completely cancels time-stop and similar special abilities).

Official name: Kamen Rider Zero-Two. The second son. Abilities include: Super-High-Speed Calculation (performs over 2 trillion calculations instantly to find the optimal solution to enemy attacks in 0.01 seconds) and Quantum Dimensional Transition (deploys multiple possibilities into the same world, functioning like clones).

Official name: Kamen Rider Geats IX. The third son. Abilities include: Power of Creation (creates desired worlds or events at will, nullifying attacks or instantly repairing destroyed structures) and Event Acceleration (uses the Geats Tail Nine cloak to accelerate his own combat speed and the restoration of matter to extreme limits). Power of Kotodama: Imbues words with mystical power through his mouthpiece to manipulate opponents just by speaking.

Official name: Kamen Rider Zets Ex-Dream. The fourth son. Abilities include: Event Redo (allows him to redo past choices and events until he reaches a possibility where he wins) and Dream Atomizer (a device that converts energy from the driver and the user's feelings into various powers to make dreams come true).

Official name: Kamen Rider Cronus. The parent of Otaku and Chiinosuke. Can use the time-stop command "Pause." He is exasperated and deeply regrets that his two sons are so incompetent. He used to be at odds with Ex-Aid and the others, but now they are on good terms. He is a good parent who feels sorry for the trouble Otaku and his brother cause the Riders.

Son of Cronus. Completely useless. Hated by everyone, but is romantically interested in Suisei. Self-centered, unhygienic, cocky, and prone to picking fights with strangers for no reason.

Son of Cronus. Completely useless. Hated by everyone, but is romantically interested in Suisei. Self-centered, unhygienic, cocky, and prone to picking fights with strangers for no reason.

A local muscular high school student. He has no special abilities but is incredibly strong, capable of fighting on par with Ex-Aid and the others. He has a mild and kind personality but can get truly angry for the sake of others.

An ordinary person.