|This article is about a/an episode in Kamen Rider Blade.|
|WARNING: This episode contains scenes of blood and bloodshed. Viewer discretion is advised!|
The 53rd Being (５３番目の存在 Gojūsanbanme no Sonzai) is the thirty-first episode of Kamen Rider Blade.
While terrorizing people, Leangle is photographed by King, the Caucasus Undead in human guise. Kazuma asks Hajime to join them, but Sakuya does not trust him. King creates a website to slander the Kamen Riders and everyone seeks him out. Kazuma encounters King, but has his Blay Buckle stolen by the Scarab Undead, who can stop time. Sakuya finds Mutsuki in a bar and learns of Hajime's true identity as the Joker Undead. Kazuma retrieves his Blay Buckle, but Hajime is abducted by the two other Undead. Kazuma then encounters Trial D, an Undead that cannot be sealed.
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- Kazuma Kenzaki (剣崎 一真 Kenzaki Kazuma): Takayuki Tsubaki (椿 隆之 Tsubaki Takayuki)
- Hajime Aikawa (相川 始 Aikawa Hajime): Ryōji Morimoto (森本 亮治 Morimoto Ryōji)
- Sakuya Tachibana (橘 朔也 Tachibana Sakuya): Kousei (Hironari) Amano (天野 浩成 Amano Kousei (Hironari))
- Mutsuki Kamijo (上城 睦月 Kamijō Mutsuki): Takahiro Hōjō (北条 隆博 Hōjō Takahiro)
- Shiori Hirose (広瀬 栞 Hirose Shiori): Yumi Egawa (江川 有未 Egawa Yumi)
- Kotarō Shirai (白井 虎太郎 Shirai Kotarō): Terunosuke Takezai (竹財 輝之助 Takezai Terunosuke)
- Nozomi Yamanaka (山中 望美 Yamanaka Nozomi): Arisa Miyazawa (宮澤 亜理沙 Miyazawa Arisa)
- Haruka Kurihara (栗原 遙香 Kurihara Haruka): Kaori Yamaguchi (山口 香緒里 Yamaguchi Kaori)
- Amane Kurihara (栗原 天音 Kurihara Amane): Hikari Kajiwara (梶原 ひかり Kajiwara Hikari)
- Yoshito Hirose (広瀬 義人 Hirose Yoshito): Junichi Haruta (春田 純一 Haruta Jun'ichi)
- King: Makoto Kamijo (上條 誠 Kamijō Makoto)
- Takeshi (タケシ): Tsutomu Nagai (永井 努 Nagai Tsutomu)
- Police: Yasushi Higuchi (樋口 靖 Higuchi Yasushi), Junichi Hirata (平田 純一 Hirata Junichi)
- Net Cafe Owner: Akihiko Haratake (原武 昭彦 Haratake Akihiko)
- Bodyguard: Pete Plum
- Scarab Undead(Voice): Katsumi Shiono (塩野 勝美 Shiono Katsumi)
- Trial D(Voice): Yuki Anai (穴井 勇輝 Anai Yūki)
Kamen Rider Blade: New Generation (Part Four)
Junichi offers them both to be Kamen Riders. He also explains that the incident with the Undead ended once, but the power of the Kamen Riders is needed again. Natsumi and Shin refuse and give back the cards. Junichi says to himself that they will return, and that it is their fate is to become Riders. Natsumi and Shin walk away (with images of their rider forms being shown) as the words "to be continued" flash acros the screen.
- As part of Super Hero Time, this episode aired alongside Tokusou Sentai Dekaranger episode 29, Episode. 29: Mirror Revenger.
- Viewership: 7.1%
- Closing Screen Rouze Card: Spirit
- Starting with this episode, the series now opens with Rider Chips' Elements.
Kamen Rider Blade Volume 8 features episodes 29-32: The Two Chalices, Lost Memories, The 53rd Being and The Destroyer's Secret. It was released on DVD on March 21st 2004, with a total run time of 90 minutes.
Blu-ray Box 2 comes with 16 episodes.