|This article is about a/an episode in Kamen Rider 555.|
The Fallen Idol ~ φ's vs. χ (落ちた偶像~ φ's vs χ Ochita Gūzō ~ Faizu Tai Kai, The Fallen Idol ~ Faiz vs. Chi) is the fifteenth episode of Kamen Rider 555. This is the first of the three-part episode of the showdown between Faiz and Kaixa, along with the debut of Kaixa's Side Basshar.
Yuji and Takumi have been knocked unconscious and into the river. Takumi’s Faiz belt was knocked off of him. His friend picks it up. Takumi’s friends find Yuji and Yuji’s friends find Takumi. Each returns to their own friends.
The attacks of the Lucky Clover continue.
During a fight with Orphenochs, Takumi realizes that Osada is one of them. Masato transforms into Kaixa to fight Osaka who is in Orphenoch form. To everyone’ssurprise, Takumi protects the Orphenoch.
Yuji and Takumi are defeated and thrown into the river. Takuma tells Yuka that she is not a traitor to the Orphenochs and leaves. Keitaro and Kusaka search for Takumi but find Kiba instead. Kaido and Yuka find Takumi. Keitaro finds the dropped Faiz belt. Yuka and Takumi are found by a group of bikers but Yuka kills them as the Crane Orphenoch as Takumi watches. Yuka runs off, finding Kiba. Later, Kaido is again attacked by Takuma as Kaixa attacks Yuka. Faiz joins in by attacking Kaixa to protect Yuka, but he is defeated by Kaixa's new Side Basshar.
- Takumi Inui (乾 巧 Inui Takumi): Kento Handa (半田 健人 Handa Kento)
- Mari Sonoda (園田 真理 Sonoda Mari): Yuria Haga (芳賀 優里亜 Haga Yuria)
- Keitaro Kikuchi (菊池 啓太郎 Kikuchi Keitarō): Ken Mizorogi (溝呂木 賢 Mizorogi Ken)
- Yuji Kiba (木場 勇治 Kiba Yūji): Masayuki Izumi (泉 政行 Izumi Masayuki)
- Yuka Osada (長田 結花 Osada Yuka): Yoshika Kato (加藤 美佳 Katō Yoshika)
- Naoya Kaido (海堂 直也 Kaidō Naoya): Mitsuru Karahashi (唐橋 充 Karahashi Mitsuru)
- Masato Kusaka (草加 雅人 Kusaka Masato): Kohei Murakami (村上 幸平 Murakami Kōhei)
- J (ジェイ Jei): Kenneth Duria (ケネス・ヅリア Kenesu Zuria)
- Itsuro Takuma (琢磨 逸郎 Takuma Itsurō): Jun Yamasaki (山崎 潤 Yamasaki Jun)
- Saeko Kageyama (影山 冴子 Kageyama Saeko): Waka (和香 Waka)
- Gangs: Susumu Ida (井田 延 Ida Susumu), Tomomi Kato (加藤 智巳 Katō Tomomi), Wataru Tsutashima (綱島 涉 Tsutashima Wataru)
- As part of Super Hero Time, this episode aired alongside Bakuryuu Sentai Abaranger episode 12, Ep. 12: The Abare Saw Cuts Through Kyoto!.
- Viewership: 10.3%
Blu-ray Box 1 comes with 17 episodes.