is a Japanese tokusatsu series that serves as the 36th installment in the Kamen Rider franchise and the seventh entry in the Reiwa era.
Main characters Baku Yorozu is an unlucky lucid dreamer who becomes an agent of CODE, under the alias . Following an incident where he is hit by an unmanned car, Baku has a long precognitive dream that ends with him being killed by Three for insubordination. Afterwards, he wakes up in the real world at the hospital, having retained all of his memories and equipment as he vows to prevent the dark future that befalls him. After the final battle, Baku, unable to return to the real world, creates his own secret organization called in the dream world to continue protecting people's dreams. He eventually returns to the real world in the epilogue.
Utilizing the Capsem in conjunction with the sash-like belt, Baku can transform into Kamen Rider Zeztz . While transformed, he gains superhuman strength. He also wields the , which can be reconfigured into varying forms, such as . Additionally, he can assume a variety of forms and/or their enhanced versions using other Capsems, which are as follows: : An enhanced version of Physicam Impact accessed from the Capsem that grants the use of shapeshifting limbs. : An enhanced version of Physicam Impact accessed from the Capsem that grants a pair of bat wings and the ability to fire blade-like energy projectiles. : An auxiliary form accessed from the Capsem that grants aero- and hydrokinesis. In this form, Baku primarily wields the Breakam Zeztzer in . This form first appears in the film Kamen Rider Gavv: Invaders of the House of Snacks. : An enhanced version of Technolom Stream accessed from the Capsem that equips Baku with a clawed gauntlet, which can either be expanded or fire a grappling hook. : An enhanced version of Technolom Stream accessed from the Capsem that clads Baku in a photokinetic mantle, which grants self-duplication capabilities. : An auxiliary form accessed from the Capsem that grants the ability to restore objects and/or heal other organisms. In this form, Baku primarily wields the Breakam Zeztzer in . : An enhanced version of Esprim Recovery accessed from the Capsem that equips Baku with a pair of forearm-mounted shields, which can combine to generate a force field. : An auxiliary form accessed from the Capsem that grants size-shifting capabilities. In this form, Baku primarily wields the Breakam Zeztzer in . : An enhanced version of Paradigm Wonder accessed from the Capsem that equips Baku with a pair of gyrokinetic gauntlets. : An upgrade form accessed from the Capsem that grants electrokinesis and superhuman speed. In this form, Baku wields the , which can switch between its bow-like and its double-bladed Sword Mode. He can also combine the Inazuma Blaster and the Breakam Zeztzer's to access the former's . However, prolonged use of this form puts Baku at risk of electrical overload. : The evolved form of Inazuma Plasma accessed from the Capsem that increases the running speed of the original form. : An enhanced version of Physicam Impact accessed from the Capsem that fuses Baku with the CODE Zeroider to grant pyrokinesis and superhuman speed. This form appears exclusively in the Hyper Battle DVD special Kamen Rider ZEZTZ: Send 'Em Flying! Giant Robot CODE Zeroider!!. : A special form accessed from an unnamed Capsem that grants the ability to generate spectral colors. This form appears exclusively in the stage show Kamen Rider ZEZTZ: Into the Dream.
Following his encounter with the Catastrophe Gore Nightmare, Baku acquires the UCAV-like Capsem, which allows him to assume one of his two super forms. In these forms, he wields the Gatling gun. : Baku's vermilion-colored super form accessed from the Dualmare Capsem's that grants chaokinesis and the ability to channel any of his preexisting forms' powers. However, if he is hesitant about defeating his opponents for even a moment, the Dualmare Capsem will strain his body and forcefully cancel his transformation. : Baku's gray-colored super form accessed from the Dualmare Capsem's that grants ordokinesis and the ability to separate Nightmares from their human hosts.
Later in the series, Baku acquires an upgraded version of the Zeztz Driver called the , which allows him to assume the following power-up forms: : Baku's final form accessed from the UFO-like Capsem that increases his oneirokinesis to its fullest potential, but overusing this ability will cause his body and mind to strain, and grants the combined powers of his preexisting Capsems (except Dualmare). : The evolved form of Zeztz Exdream accessed from the Capsem in conjunction with an upgraded version of the Zeztz Exdream Driver called the that grants the combined powers of Code Numbers: 0-7. This form appears exclusively in the film Kamen Rider ZEZTZ: Farewell Mission. : An enhanced version of Physicam Impact accessed from the eponymous Capsem that increases the capabilities of the original form. While assuming this form, the Zeztz Exdream Driver becomes the Zeztz Agendream Driver.
Baku Yorozu is portrayed by . As a child, Baku is portrayed by .
Nem is a nationally popular celebrity and the queen of commercials. Once someone sees her, they will definitely have dreams of the young celebrity. She was brought into existence by the Phantom Gore Nightmare before her mother The Lady put her up for adoption to keep CODE from taking her away. As a child, Nem lived in several children's care facilities until , the CEO of her talent agency, adopted her. Four years prior to the series, she was involved in a car accident that put her into a comatose state before The Lady kidnapped her. In Baku's premonition, she is awakened from her comatose state by the young agent before CODE captures her for experimentation. She eventually awakens from her comatose state as Baku takes her into his custody. In an effort to destroy the Oblivion Gore Nightmare, Nem erases herself from existence, only to be rescued by her friends. After the final battle, she resumes her celebrity career in the real world while spending quality time with a dream entity of her mother in the dream world.
Nem is portrayed by . As a child, Nem is portrayed by .
Nox is a mysterious man who was an agent of CODE, under the alias . His true identity is , a detective of the Tokyo Metropolitan Police Department and a member of its Mysterious Case Division before resigning and disappearing a year prior to the series, discarding his original name and identity in the process. In Baku's premonition, he is the leading force behind the Nightmare attacks until Kamen Rider Zeztz kills him. He was temporarily brainwashed by Three into serving CODE once again until Kamen Rider Zeztz uses the Shock Capsem to undo the mind control. When Zero is killed by the Catastrophe Gore Nightmare, Nox ultimately carries out the former's last mission to destroy CODE and expose information regarding the organization's conspiracy and the Nightmares' involvement since ancient times. After the final battle, he returns to the Mysterious Case Division.
Throughout the series, Nox has assumed the following forms as he wields the , which can switch between its longsword-like and its rifle-like , in battle: : Nox's Kamen Rider-esque warrior form accessed from the Capsem in conjunction with the sash-like belt that grants nihilikinesis. : Nox's Rider form accessed from the Capsem in conjunction with the sash-like belt that grants umbrakinesis. Additionally, he can assume a variety of forms known as Shadows using other Capsems. : An auxiliary form accessed from the Capsem that equips Nox with a right forearm-mounted cannon. : An auxiliary form accessed from the Capsem that equips Nox with a right forearm-mounted blade. : Nox's final form accessed from the eponymous two-in-one Capsem, which is created from the Shadow Capsem, that grants photo- and umbrakinesis and the ability to cast illusions.
Nox is portrayed by .
Sieg is a terrorist from a criminal family who was sentenced to 1000 years in prison for assassinating people in their dreams, including his father , and an agent of CODE, under the alias , before meeting and absorbing the Punish Gore Nightmare. He is ultimately defeated by Kamen Rider Zeztz Exdream, though he can reappear as a dream entity if dreamers think about him. After the Code: Somnia Capsem is stolen, he is initially accused of said theft by Baku, who uses the Dualmare Capsem to separate him and the Punish Gore Nightmare. With Nem's encouragement, Sieg destroys the Punish Gore Nightmare to atone for his past crimes. After the final battle, he spends all his time waiting for his allies in the real world to remember him in their dreams.
Utilizing the Capsem in conjunction with the sword, which can switch between its one-piece and its two-piece , Sieg can transform into . While transformed, he can gain either hemokinesis when fused with the Punish Gore Nightmare or pyrokinesis when separated from the latter.
Sieg is portrayed by . As a child, Sieg is portrayed by .
Recurring characters Tetsuya Fujimi is a detective of the Tokyo Metropolitan Police Department, with the rank of Police Inspector, and the chief of its which investigates mysterious unsolved cases known as .
Tetsuya Fujimi is portrayed by .
Nasuka Nagumo is an elite rookie detective of the Tokyo Metropolitan Police Department, with the rank of Police Inspector, and a member of its Mysterious Case Division.
Nasuka Nagumo is portrayed by .
Minami Yorozu is Baku's adoptive younger sister and a talent manager who lives with him. Her true identity is an agent of CODE, under the alias , assigned to work undercover as Baku's sister. After defeating Lord Thirteen, she starts the entertainment agency that Nem is affiliated with.
During the events of the web-exclusive series Kamen Rider ZEZTZ: Series of Sister's Substory: Agent Minami, Minami transforms into the following Kamen Rider-esque warriors: : A special form accessed from the CODE Capsem in conjunction with the Knight Invoker that grants similar capabilities as Nox Knight. While transformed, Minami wields the Breakam Buster. : A special form accessed from the CODE Capsem in conjunction with the Lord Invoker that grants similar capabilities as the other Lords. While transformed, Minami primarily wields the Breakam Breaker in Shoot Mode.
Minami Yorozu is portrayed by .
CODE The , abbreviated as , is a clandestine organization who fights against the Nightmares. Each member has an assigned alias. The cram school Baku and Kureha attended as children served as a front for CODE's agent training center, and the students in said school's special class which Nox was in charge of in the past were unknowingly trained to be agents through the process.
Similarly to Baku, certain CODE members utilize spherical devices in conjunction with the sash-like belt to transform into Kamen Rider-esque warriors known as . While transformed, they each carry a , which like the Breakam Zeztzer can be reconfigured into varying forms.
Zero is the mysterious commander of CODE who uses the drone, which can switch between its humanoid and its motorcycle-like , as his avatar. He frequently speaks in English and freely switches between it and Japanese when conversing with others. In Baku's premonition, he acts as a mentor to the young agent until Kamen Rider Nox defeats him and steals the CODE Zeroider's memory unit. When Baku eventually awakens from his premonition, the young agent becomes distrustful of Zero for his treatment of CODE's agents. Baku later learns that Zero is his real father.