Mitsuzane Kureshima

"There will always be hardship and sorrow in life. But I'd rather take them upon myself than let the people I love suffer. That's why you did it.. right, Kota?"

- Mitsuzane before his first transformation.

Mitsuzane Kureshima (呉島 光実), nicknamed Mitchy (ミッチ) is Kamen Rider Ryugen (仮面ライダー龍玄 [リュウゲン]). He uses the Budou Lockseed.

The Fateful Sengoku Movie Battle
A battle royale is being held exclusively for the Armored Riders in Zawame City. Kamen Riders Gaim, Baron, Ryugen, Kurokage, and Gridon decide to enter the competition. While fighting, a crack opens in the sky and mysterious monsters pour out from it. One of the monsters captures Mai and returns to the crack, with the Riders giving chase. Soon, they find themselves in a Warring States Period-esque world where the Kamen Riders are called Bujin (武神) and are fighting each other. The confused Kamen Rider Gaim then gets attacked by the strongest Bujin Gaim (武神鎧武).

Kamen Rider Taisen
Mitsuzane volunteered to fight in the war between Heisei and Showa Riders. However, he was temporarily killed by a Showa Rider, turning him into a Lockseed, leading Kota, Takatora, Kaito and the Armored Riders to volunteer in the war on the Heisei side.

Possible Future
In a possible future, Ryugen stood by Zangetsu's side and his army of Inves and Suika Arms Armored Riders, watching the battle between Gaim and Baron's armies, assuming that his brother will know his identity.

Personality
He is a member of Team Gaim and Kota sees him as his younger brother. He is the son of a director of the Yggdrasill Corporation and attends an elite high school, a side of him which he keeps hidden from everyone. Living under his brother's shadow, he wants to live freely and break free from the path established for him, as such he sees Team Gaim as family due him being able to be himself while there.

He also respects Kota as a role model, basing his own beliefs around Kota's and always want to do more to help others. He also harbors a secret crush on Mai, which drives him to ask for a Sengoku Driver from Sid and become a rider himself, when Mai is at wit's end due to Kota being shaken to the core after the encounter with Zangetsu. After knowning that Yuya Sumii turned into Byakko Inves and for Kota as Gaim unknowingly killed him, Mitsuzane tried to hide this from Kota and even Team Gaim, trying not to disappoint his friends.

Despite having a cheerful and optimistic personality, in reality, Mitsuzane also has a dark personality. He will use his own status or a current situation for his own benefit and sake. As shown, he convinced Sid to give him the Sengoku Driver, which Mitsuzane tells Sid that one day he will surpass his brother. Mitsuzane also forced Sid to give him a Lockvehicle or else Mitsuzane would tell Takatora that Sid is the one who gave Kota the Suika Lockseed. Mitsuzane also stole the Suika Lockseed from his brother without any guilt and swears to betray anyone or everything as long he can retain his friends' happiness. He also tries to destroy Kota after he learned that Mai likes Kota more than himself. Currently, only Sid, Yoko, and Ryoma know about Mitsuzane's inner darker personality.

Arms
Like with the other Armored Riders, Kamen Rider Ryugen's forms are called Arms (アームズ). All of his Chinese Soldier-themed Arms' helmets share the suffix Men (面) as their title, while his visors are called Ryugan (龍眼).

Devices

 * Sengoku Driver - Transformation device
 * Arms Weapons:
 * Budou Ryuhou - Ryugen Budou Arms' personal weapon
 * Kiwi Gekirin - Ryugen Kiwi Arms' personal weapons
 * Trigger Magnum - Ryugen Double Arms' personal weapon
 * Pine Iron - Ryugen Pine Arms' personal weapon
 * Banaspear - Ryugen Banana Arms' personal weapon
 * Melon Defender - Ryugen Melon Arms' personal weapon
 * Lockseeds - Gives access to Ryugen's form changes, depending on which arm the lock is

Vehicles

 * Sakura Hurricane - borrowed Rider Machine from Gaim
 * Rose Attacker - Ryugen's Rider Machine

List of Appearances

 * Kamen Rider Gaim
 * 1-24
 * Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle
 * Kamen Rider Gaim: Sengoku Battle Royale
 * Sengoku Movie Battle
 * Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai
 * Ressha Sentai ToQger Vs. Kamen Rider Gaim Spring Vacation Combining Special

Portrayal
Mitsuzane Kureshima is portrayed by Mahiro Takasugi (高杉 真宙).

As Kamen Rider Ryugen, his suit actor is Daisuke Satō (佐藤 太輔), who was previously the suit actor for Gokai Silver in Kaizoku Sentai Gokaiger and Beet J Stag/Stag Buster in Tokumei Sentai Go-Busters.

Legend Rider Lockseeds

 * In addition to the Double Lockseed, the following toyline-exclusive Legend Rider Lockseeds are also styled for Ryugen:
 * V3
 * Skyrider
 * Super-1
 * Kuuga
 * Joker
 * Meteor