is a Japanese tokusatsu series that serves as the 24th installment in the Kamen Rider franchise and the 15th entry in the Heisei era. Kota Kazuraba must use his newfound powers as the titular hero to battle the mysterious Inves monsters as well as other rival Kamen Riders, all known as "Armored Riders", in what is described by the show as a . Characters are aligned with each other as members of dance crews, or Beat Riders, and various organizations.
Main characters Kota Kazuraba is an earnest and cheerful yet naïve and short-sighted young adult who wants to help others, but sometimes ends up causing more trouble than good. He was originally the second-in-command of Team Gaim before quitting the team to pursue odd jobs and help his older sister, Akira, after their parents died, before eventually getting a job at Drupers. However, his life is changed after Team Gaim's leader Yuya Sumii arranges a meeting with Kota to show him something that could help their team. This leads Kota to search for Sumii in what he later learns is the Helheim Forest, finding a belt that his friend bought from the mysterious Lockseed Dealer Sid, and an Inves that Kota manages to destroy via the Sengoku Driver and a padlock-like device. While figuring out how best to use his newly acquired powers, Kota witnesses his rival, Kaito Kumon's, summoned Inves go on a rampage and becomes determined to protect people as the samurai-themed Kamen Rider Gaim. After he rejoins Team Gaim in the apparently missing Sumii's stead, Kota inspires others to become Armored Riders themselves.
In the middle of the series, Kota continues his fight towards the corrupt Yggdrasil Corporation after discovering the company's shady attempts at covering up the Inves attacks with the Beat Riders being scapegoated as a result. Kota then obtains Kiwami Arms to oppose the Overlord Inves' invasion on Earth and eventually duels against Kaito in the final battle to obtain the Forbidden Fruit. With Kota emerges as the victor, he ascends to the title of Man of the Beginning, removing Helheim's influence on Earth to another planet as their new ruler alongside Mai.
Utilizing one of several Lockseeds in conjunction with the Sengoku Driver, Kota can transform into Kamen Rider Gaim. While transformed, he wields the chokutō-like pistol sword, which can combine with certain to access alternate modes. His personal is the motorcycle, which is summoned from the eponymous Lockseed. Additionally, he can use other Lockseeds to assume varying forms that each possess a unique Arms Weapon, which are as follows: : Kota's default form accessed from the Lockseed that grants the use of the sword, which can combine with the Musou Saber to access the former's double-bladed . : An auxiliary form accessed from the that grants the use of the flail, which can combine with the Musou Saber to access the former's . : An auxiliary form accessed from the Lockseed that grants the use of unlimited exploding . : An auxiliary form accessed from the Lockseed that docks Kota inside a mecha also known as Suika Arms, which can switch between the humanoid , the spherical , and the flying . While assuming Yoroi Mode, he wields the naginata. : An upgrade form accessed by combining the Sengoku Driver and the while using the Orange Lockseed in conjunction with the former and any artificial in conjunction with the latter that can switch between varying sub-forms. In these forms, Kota wields the bladed bow. : The yellow-colored evolved form of Orange Arms accessed from the Orange and Lemon Energy Lockseeds that grants superhuman strength. : The red-colored evolved form of Orange Arms accessed from the Orange and Cherry Energy Lockseeds that grants superhuman speed. : The pink-colored evolved form of Orange Arms accessed from the Orange and Peach Energy Lockseeds that grants superhuman senses. However, Kota will suffer from sensory overload if exposed to higher-pitched sound waves. : Kota's super form accessed from the Lockseed that grants the use of the tanegashima, which can combine with the Musou Saber to access the former's , and the twin sashimono. : An evolution of Kachidoki Arms and Kota's final form accessed from the Kachidoki Lockseed combined with the adapter-like Lockseed that grants the ability to summon any Arms Weapon. : A special form accessed from the Lockseed that grants the use of Kamen Rider Wizard's WizarSwordGun. This form appears exclusively in the crossover film Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle. : A special form accessed from the Lockseed that grants two pairs of the Musou Saber and Daidaimaru. This form appears exclusively in the Hyper Battle DVD special Kamen Rider Gaim: Fresh Orange Arms Is Born! ~You Can Also Seize It! The Power of Fresh~. : A special form accessed from the Lockseed channeling the Lockseed that grants superhuman athleticism. This form appears exclusively in the crossover film Heisei Rider vs. Shōwa Rider: Kamen Rider Taisen feat. Super Sentai. : A special form accessed by combining the Sengoku Driver and Genesis Core Unit while using the Lockseed in conjunction with the former and the Lockseed in conjunction with the latter that grants umbrakinesis. While assuming this form, Kota is referred to as . This form appears exclusively in the film Kamen Rider Gaim: Great Soccer Battle! Golden Fruits Cup!. : A special form accessed from the Lockseed that grants the use of Kamen Rider Drive's Handle-Ken. This form appears exclusively in the crossover film Kamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle.
Kota Kazuraba is portrayed by . As a child, Kota is portrayed by .
Kaito Kumon is the brooding leader of Team Baron who bears a strong hatred towards the Yggdrasil Corporation, who bought out his father's construction company as part of their redevelopment plans for Zawame. As a result, Kaito grew up in a poor household, his father became abusive towards him and his mother, and both of his parents eventually committed suicide, leading to Kaito being placed into an orphanage at a young age. This childhood cemented a survival of the fittest-like mentality in his later years and fostered a personal desire to acquire power for himself as he believes he cannot trust anyone else.
In the present day, Kaito ascends to the leadership of Team Baron and obtains the means to become the knight-themed as part of the Inves Games. When Yggdrasil made their move to turn the Beat Riders as scapegoats, Kaito retires from Team Baron and put Zack as his replacement leader while he launches his fight against the company as an independent Armored Rider. During the Helheim's invasion on Earth, Kaito joins forces with the rest of the Armored Riders against the invaders, but his infection and determination to reverse the status quo of the weak twisted his mind to mutate into the Overlord Inves form; . He fights against Kota in the duel to obtain the Forbidden Fruit, eventually acknowledging his rival's strength in his final breath.
Utilizing the Lockseed in conjunction with the Sengoku Driver, Kaito can transform into Kamen Rider Baron . While transformed, he wields the lance. His personal Lock Vehicle is the motorcycle, which is summoned from the eponymous Lockseed. Additionally, he can use other Lockseeds to assume varying Arms that each possess a unique Arms Weapon, which are as follows: : An auxiliary form accessed from the Lockseed that grants the use of the mace. Lemon Energy Arms: Kaito's final form accessed from the Lemon Energy Lockseed in conjunction with the Genesis Driver that grants similar capabilities as Ryoma's version. : A special form accessed from the Lockseed that grants the use of Kamen Rider OOO's Medajaribur. This form appears exclusively in the crossover film Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle. Ringo Arms: A special form accessed from the Ringo Lockseed that grants similar capabilities as Tōka's version. This form appears exclusively in the V-Cinema Gaim Gaiden: Kamen Rider Baron.
During the events of the web-exclusive miniseries Kamen Sentai Gorider, Kuroto Dan arranges the resurrection of Kaito, among other deceased Kamen Riders, to lure Emu Hojo into the Game World and kill him. However, Kazuma Kenzaki arrives to help Emu and the revived Riders stop Kuroto. During the fight, Kaito assumes the form of before joining the other fallen Riders in sacrificing themselves to defeat Kuroto and ensure Emu and Kenkazi's escape.
Kaito Kumon is portrayed by . As a child, Kaito is portrayed by .
Mitsuzane Kureshima , also known as to his friends, is a smart yet manipulative member of Team Gaim who initially conceals his familial relation to his older brother Takatora and wealthy upbringing from his friends as well as his Beat Rider activities from his brother. Despite going to an elite school, Mitsuzane wishes to follow his own path rather than follow in his brother's. After his friend Kota Kazuraba is nearly killed by Kamen Rider Zangetsu, Mitsuzane convinces Sid to give him a Sengoku Driver so he can become Team Gaim's second Armored Rider, the Chinese soldier/dragon-themed .
Upon discovering Takatora is Zangetsu, Mitsuzane initially resolves to uncover the truth behind the Yggdrasil Corporation's ties to the Helheim Forest. However, his desire to protect Kota and their mutual friend Mai Takatsukasa from the truth and discovery of what happened to Team Gaim member Yuya Sumii leads Mitsuzane to help Takatora conceal information on the Helheim Forest instead. Eventually in the middle of the series, Mitsuzane went insane from the influences of both the Yggdrasil workers and the Overlords, secretly opposing Kota and the Armored Riders from the shadows before his treachery is made public. He eventually falls into despair once Ryoma's manipulations caused him to seemingly kill both Kota and Mai at the same time, eventually distancing himself from his former friends out of guilt. Only through the arrival of Kogane, Mitsuzane is able to obtain his closure after meeting Kota again, the two finally burying the hatchet before he joins his brother in hunting the Yggdrasil remnants.
Utilizing the Lockseed in conjunction with the Sengoku Driver, Mitsuzane can transform into Kamen Rider Ryugen . While transformed, he wields the handgun. Additionally, he can use other Lockseeds to assume varying Arms that each possess a unique Arms Weapon, which are as follows: : An auxiliary form accessed from the Lockseed that grants the use of the twin wind and fire wheels. : Mitsuzane's final form accessed from the Lockseed that grants Overlord-like powers and the ability to summon any of his preexisting forms' Arms Weapons at the cost of crippling pain. While assuming this form, he is referred to as . : A special form accessed from the Lockseed that grants the use of Kamen Rider W's Trigger Magnum. This form appears exclusively in the crossover film Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle.
Mitsuzane later steals his brother's Genesis Driver, which he utilizes in conjunction with the Melon Energy Lockseed to transform into Kamen Rider Zangetsu-Shin Melon Energy Arms. While transformed, he wields the Sonic Arrow.
Mitsuzane Kureshima is portrayed by . As a child, Mitsuzane is portrayed by in the TV series and in the stage show Gaim Gaiden: Kamen Rider Zangetsu.
Mai Takatsukasa