Den-O Sword Form

"Sword Form!" - The announcement on transforming into Den-O's sword form.

Den-O Sword Form (電王 ソードフォーム Kamen Raidā Den-O Sōdo Fōmu) is one of the main form in Kamen Rider Den-O. Sword Form first appeared in Here I Come, first appeared after Momotaros entered Ryoutarou Nogami. He pressed the red button and transformed into Sword Form, and easily defeated Bat Imagin. The suit of Sword Form is played by Seiji Takaiwa, with the voice of Toshihiko Seki.

Engine Bros

"Gear Engine! Funky! Engine Running Gear!" - The transformation sound of turning into Engine Bros.

Engine Bros (エンジンブロス Enjin Burosu) is one of the forms in the series Kamen Rider Build. It is the White Kaiser which is used by Rai Washio, the younger brother of Fu Washio. It is transformed to with the Gear Engine and the Nebula Steam Gun. It first appeared in The Phantom of the West, when it was transformed into and ruthlessly murdered Kiba. The suit is portrayed by Keisuke Azuma, with the voice of Osamu Adachi.

Shoutarou Hidari

"Now, count out your sins!" - The phrase that Shoutarou says after transforming into Kamen Rider Double.

Shoutarou Hidari is the main rider of Kamen Rider W. Shoutarou claims himself as a hardiboiled detective, although his friends mostly calls him half-boiled. He works as a private detective and has an identity of transforming into a Kamen Rider, in the Futo City.

He uses the Joker Gaia Memory and the Double Driver to transform into Kamen Rider Double, with his partner Philip. When Shoutarou uses the Lost Driver, he can transform into his standalone form Kamen Rider Joker. He is portrayed by Renn Kiriyama. As a child, he is portrayed by Issei Kakazu.

Ryuusei Sakuta

"Kamen Rider Meteor! Your fate is in my hands." - Ryuusei as Meteor's catchphrase.

Ryuusei Sakuta (朔田 流星 Sakuta Ryūsei) is the secondary rider of Kamen Rider Fourze. He was a student from Subaruboshi High School who got transfered to Amanogawa High. In the start of the series, he kept his identity away from everyone in the Kamen Rider Club, to be able to transform to Kamen Rider Meteor, because if his identity was found out to anyone, his benefactor Tachibana will not allow him to transform into Kamen Rider Meteor anymore.

Akira Date

"Wait up! Wait up! Wait up! Traveling doctor Date Akira, returns!" - Akira's phrase when he arrived again, after his surgery.

Akira Date (伊達 明 Date Akira) is one of the riders of Kamen Rider OOO. Much like Eiji Hino, Date travels the world, who was seen in Africa in the Civil War, getting an Automatic Colt Pistol bullet stuck in his brain, that ruins his performance and makes his fighting become  more lousy at times. When he came to Japan again, he was hired by the Kougami Foundation. He was the user of the Kamen Rider Birth system to defeat the Greeed. 

Hiiro Kagami

"There is nothing I cannot cut," - Hiiro's catchphrase when wanting to cut something.

Hiiro Kagami (鏡 飛彩 Kagami Hiiro) is the secondary Rider of Kamen Rider Ex-Aid. He is a surgeon in Seito University Hospital, who is also the son of Haima Kagami. He uses the Taddle franchise gashats and a Gamer Driver to transform into Kamen Rider Brave. He is portrayed by Toshiki Seto.

Souji Tendou

"I am a man who walks the path of the heavens to rule over everything, Souji Tendou," - Souji Tendou's motto from his grandmother.

Souji Tendou (天道 総司 Tendō Sōji) is the main protagonist of Kamen Rider Kabuto, who was previously known as Souji Kusakabe (日下部 総司 Kusakabe Sōji). He uses the Rider Belt with the Kabuto Zecter to transform into Kamen Rider Kabuto. He is portrayed by Hiro Mizushima.

Poppy Pipopapo

"Costume Change!" - - Asuna transforming to Poppy, or vice versa.

Poppy Pipopapo (ポッピーピポパポ Poppī Pipopapo) is a character in Kamen Rider Ex-Aid. She is the Bugster from the game DoReMiFaBeat game. She is also Kamen Rider Poppy, where she uses the gashat Toki Meki Crisis, that was from Lovellica. 

Poppy as her other form, Asuna Karino, is a nurse for Seito University Hospital, and a personnel from the Ministry of Health. Poppy is also the singer of the theme song for Genm Corporation, People Game. Poppy is also part of the Mid Tier Bugster which includes her, Vernier, Kaiden and Gatton. She is portrayed by Ruka Matsuda as both Poppy and Asuna.

Ryoutarou Nogami

"Train slash!" - Ryoutarou as Liner Form before slashing an enemy.

Ryoutarou Nogami (野上 良太郎 Nogami Ryōtarō) is the protagonist of Kamen Rider Den-O. He is a young man who has a lot of bad luck. He uses the Den-O Buckle to transform into Kamen Rider Den-O, with an Imagin in tow. He uses a pass to transform, but without an Imagin, he can transform to either Plat Form or Liner Form. As his adult version he is portrayed by Takeru Satou. His child actor is Takuya Mizoguchi.

Kouta Kazuraba

"This is my stage now!" - Kouta as Gaim, before fighting.

Kouta Kazuraba (葛葉 紘汰 Kazuraba Kōta) is the main protagonist in Kamen Rider Gaim. He uses an Orange Lockseed to transform into Kamen Rider Gaim, while in wield of the Sengoku Driver where he picked up from the Helheim Forest, the place where Yuuya Sumii went missing. He then was nicknamed "Armored Rider Gaim" from DJ Sagara. At first, he didn't understand what was the power behind Gaim, and later on uses it to defend Zawame City, before claiming the Golden Fruit and becoming Man of the Beginning. Kouta is portrayed by Gaku Sano. Young Kouta was portrayed by Hayate Torii.

Kazumi Sawatari

"The fire of my heart... passion. I'll let my passion burn and crush everything!" - Kazumi's catchphrase, as his fighting crave grows.

Kazumi Sawatari (猿渡 一海 Sawatari Kazumi) is the leader of the Hokuto Three Crows team, and also Kamen Rider Grease (仮面ライダーグリス Kamen Raidā Gurisu). He uses the Robot Sclashjelly to transform. He also uses the Sclash Driver where he got from Soichi Isurugi to fight, which makes him more craving for battles. He is portrayed by Kouhei Takeda.

Ryuuga Banjou

"What is this power? I feel like I can't lose!" - Ryuuga, transforming into Cross Z Charge for the first time

Ryuuga Banjou (万丈 龍我 Banjō Ryūga) is the secondary rider of Kamen Rider Build. He uses the Dragon Fullbottle, which he got from his deceased girlfriend, Kasumi Ogura, and the Build Driver to transform into Kamen Rider Cross Z Charge. Later on in the series, he uses the Sclash Driver to transform into Cross Z Charge, by using the Dragon Sclashjelly. Ryuuga Banjou is portrayed by Eiji Akaso.