Shinji Tatsumi

Shinji Tatsumi (辰巳 シンジ) is the resident Kamen Rider of the World of Ryuki in Kamen Rider Decade.

Shinji Tatsumi
Shinji Tatsumi is a young man who worked for the Atashi Journal as its photographer alongside its top writer Ren Haguro until he left the Journal three years ago without explaining himself. Since then Shinji was distraught and felt betrayed as a result. However, when his editor Reiko Momoi is mysteriously murdered, Shinji finds Ren present at the scene. Soon after, Shinji is chosen to become Kamen Rider Ryuki, though is reluctant to join the Kamen Rider Trial that would judge the fate of the suspected murderer: Natsumi Hikari.

Biography
As the trial begins, Shinji crosses paths with Yuusuke Onodera and Tsukasa Kadoya, who represents Natsumi as her defense attorney. After telling them what the official sources say behind Reiko's death and admitting he feels that Natsumi's innocent, Shinji accompanies Tsukasa and Yuusuke to the crime scene to meet Kamata who confirms Ren's appearance at the Journal around Reiko's death. While Kamata and Tsukasa enter the Mirror World to fight, Shinji confronts Ren to demand what he was doing at the Atashi Journal. Once in the Mirror World, Shinji challenges Ren as he believes that Ren is the true murderer and has framed Natsumi. However, their fight is interrupted once Decade appears and challenges Knight with Ryuki watching their fight with contempt for Knight. Shinji later uses the Time Vent card Ren had acquired to reverse the flow of time, saving Reiko Momoi from murder and exposing Kamata as the murderer. Along with Decade, Shinji fights Abyss, revealing that Kamata is actually the Paradoxa Undead.

He later appears in Kamen Rider × Kamen Rider W & Decade: Movie War 2010 alongside the other Riders of the Nine Worlds to help in reviving Tsukasa and helps him battle Super Shocker, assuming Ryuki Survive with the help of Decade's K-Touch and later into his Ryuki Dragredder form with the All Rider Final Form Ride Card to fight the Super Crisis Fortress.

Later appearances
Movie War 2010 currently remains the last appearance of Shinji Tatsumi. The Ryuki that appears in OOO, Den-O, All Riders: Let's Go Kamen Riders and Kamen Rider × Super Sentai: Super Hero Taisen is the original Ryuki, Shinji Kido.

Forms
Just like the original Ryuki, he is a "balanced" Rider with equally powerful melee and long-range fighting capabilities. His Contact Monster, Dragreder (ドラグレッダー), provides his appearance and Final Vent Dragon Rider Kick (ドラゴンライダーキック). Kamen Rider Decade's Final Form Ride allows Ryuki to change into Ryuki Dragreder (リュウキドラグレッダー). This automatically equips Ryuki with Guard Vent and Sword Vent. While the first transformation required Decade's assistance, Ryuki eventually was able to transform at will into this form.

When in Survive Form, his Final Attack Ride with Decade is not the Dragon Firestorm, but an unnamed Rider Slash. This Ryuki also has no need of Drag Reder to use his Drag-Visor Zwei's shooting functions.

Portrayal
Shinji Tatsumi is portrayed by Momosuke Mizutani (水谷 百輔). As Kamen Rider Ryuki, his suit actor is Jun Watanabe (渡辺 淳).

Etymology

 * "Tatsu" is the Kun'yomi method of how to pronounce Dragon (竜).