Due to his status as a Gate, Sou Fueki kidnapped Haruto and several others like him and subjected them to the Sabbath ritual in a failed attempt to revive his deceased daughter, Koyomi.
Motivated by a desire to provide hope to people who have fallen into despair and now finding mundane life boring, Haruto takes up residence in the antiques shop Omokagedō to gain more Wizard Rings (ウィザードリング, Wizādo Ringu) to bolster his powers and christens himself a Kamen Rider, though he finds solace in his love of doughnuts and frequents the Donut Shop Hungry to satiate this desire.
Despite placing the Philosopher's Stone in her body, he succeeded in half-resurrecting her and entrusts Haruto with protecting her and giving her periodic infusions of magical energy to maintain her state of being.
Initially possessing no memory of what happened to her, she resents her half-dead state and wishes she was properly dead, though Haruto slowly convinces Koyomi to have hope in him, be more accepting of her circumstances, and work towards the future.
Koyomi eventually learns the truth of what happened to her before Sora Takigawa rips the Philosopher's Stone out of her body, killing her once more.
After defeating Takigawa, Haruto takes the Philosopher's Stone and travels the world in the hopes of hiding it and preventing it being misused any further, eventually finding an ideal place in the form of his own Underworld's Koyomi.
In the Kamen Rider Wizard tie-in novel, Haruto and Rinko have a daughter and name her Koyomi in memory of their deceased friend.
Shunpei Nara (奈良 瞬平, Nara Shunpei) is a clumsy young man who has been fascinated with magic ever since he read the picture book The Forest Wizard (森の魔法使い, Mori no Mahōtsukai), even going so far as to quote the wizard's magic phrase "Chichin Pui Pui" (ちちんぷいぷい) and attempt to become Haruto's apprentice.
Kosuke Nito (仁藤 攻介, Nitō Kōsuke) is a young, optimistic archaeologist from the Fukui Prefecture who believes that pinches and chances are two sides of the same coin, possesses a gigantic appetite, and a tendency to put mayonnaise on everything he eats.
While on an expedition as a student archaeologist, he found the Beast Driver (ビーストドライバー, Bīsuto Doraibā) belt and broke a seal holding a horde of Ghouls at bay.
Despite this, Kosuke maintains the pact so he can learn more about Phantoms and his newfound powers under the belief that he will never make an important discovery like Beast Chimera again.
Similarly to Haruto, Kosuke possesses his own series of rings that allow him to access different right shoulder-mounted Mantles (マント, Manto), which grant different animal-inspired powers.
When Kosuke found the Beast Driver, Chimera formed a pact with the human to spare his life in return for being provided an abundance of magical energy, such as that of other Phantoms', to feed on.
After he kills the Phantom, Medusa, for threatening his plans, Fueki's multiple aliases are exposed and he reveals his true intentions to everyone involved before forcing Haruto, Mayu, Yuzuru, and Masahiro to become his second Sabbath's power source and using all of Tokyo as a sacrificial site.
[33][34][23] Utilizing the Change (チェンジ, Chenji) Ring in conjunction with the White Wizard Driver (白い魔法使いドライバー, Shiroi Mahōtsukai Doraibā) belt, Fueki can transform into Kamen Rider Wiseman.
[35] While transformed, he possesses his own set of Magic Rings, which allow him to perform enhanced versions of Haruto's spells, and wields the flute-like Hamel Cane (ハーメルケイン, Hāmeru Kein) spear.
The Phantoms (ファントム, Fantomu) are mythical creature-themed monsters born from Gates, humans with magical potential who experience true hopelessness.
During their final battle, the wizard sends Phoenix hurtling into the sun, which traps the Phantom in an endless loop of dying and resurrection that consumes his mana before he can fully regenerate.
In battle, Phoenix wields the Catastrophe (カタストロフ, Katasutorofu) broadsword, can control hellfire, and revive from any attack that would be fatal to other Phantoms with more power than he previously possessed.
Sora Takigawa (滝川 空, Takigawa Sora), initially credited as a "youth" (青年, seinen), is a hairdresser turned serial killer who murdered and scalped an unknown number of his former clients due to their resemblance to a former girlfriend, whom he killed in a fit of rage after she broke up with him, and was among the Gates that Fueki kidnapped for his Sabbath and turned into Phantoms.
When Kosuke Nito foils Fueki's second Sabbath, Takigawa tricks the latter into weakening himself before killing him to extract the Philosopher's Stone from Koyomi and absorb it.
However, he inadvertently evolves his Phantom form and resolves to amass more magical energy through senseless death and destruction, leading Haruto to confirm that Takigawa had since abandoned his humanity prior to the Sabbath.
[38] In his Phantom form, Takigawa wields the twin scissor-like Rapture (ラプチャー, Rapuchā) swords and possesses superhuman speed.
After ending up in Kamimura's Underworld, Haruto helps him move past his fantasies, rescue the trapped children, and work together to defeat the Akumaizer.
Additionally, the film versions wield the broom-like Ride Scraper (ライドスクレイパー, Raido Sukureipā) spear, which can be utilized for offensive and transportation purposes.
As a result, Mayu becomes a witch and accepts the White Wizard's offer to hone her skills so she can hunt Phantoms and avenge her family.
After several battles with Medusa however, Mayu discovers the White Wizard's true identity and intentions and sides with Haruto Soma to stop him.
While Kosuke fights the Phantom, Medusa takes advantage by attacking and seemingly killing Aya to make Masahiro fall into despair.
Upon learning Haruto protected Aya at the last minute, Masahiro overcomes his despair and suppresses his inner Phantom, only to be kidnapped, brainwashed, and turned into a green version of Kamen Rider Mage by Sou Fueki for his Sabbath ritual.
Masahiro initially attempts to return to his family, but Aya convinces him to help Haruto, Kosuke, and their allies stop Sora Takigawa.