|This article is about a/an episode in Kamen Rider Blade.|
Chalice's True Identity (カリスの正体 Karisu no Shōtai) is the sixth episode of Kamen Rider Blade.
Once Chalice obtained the antibody, he sealed the Centipede Undead. Kazuma then asks Hajime if he is Chalice, but he admits nothing and tells him that no one wants to know the truth. Kazuma and Kotarou return home to find a note left by Shiori. She left and apologized because she thinks her father released the Undead. Sakuya has been staying at his old friend Sayoko's office to find out what is wrong with him. Karasuma finds her and tells her that Sakuya's problem is only psychological. After Kazuma and Kotarou find Shiori, they are attacked and Kazuma is kidnapped.
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- Kazuma Kenzaki (剣崎 一真 Kenzaki Kazuma): Takayuki Tsubaki (椿 隆之 Tsubaki Takayuki)
- Sakuya Tachibana (橘 朔也 Tachibana Sakuya): Kousei (Hironari) Amano (天野 浩成 Amano Kousei (Hironari))
- Hajime Aikawa (相川 始 Aikawa Hajime): Ryōji Morimoto (森本 亮治 Morimoto Ryōji)
- 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)
- Sayoko Fukasawa (深沢 小夜子 Fukasawa Sayoko): Urara Awata (粟田 麗 Awata Urara)
- Isaka (伊坂): Yasukaze Motomiya (本宮 泰風 Motomiya Yasukaze)
- 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)
- Kei Karasuma (烏丸 啓 Karasuma Kei): Kazuhiro Yamaji (山路 和弘 Yamaji Kazuhiro)
- Centipede Undead(Voice): Katsumi Shiono (塩野 勝美 Shiono Katsumi)
- Isaka's Henchmen: Masahiro Furugoori (古郡 雅浩 Furugoori Masahiro), Tomohiro Abe (阿部 朋広 Abe Tomohiro)
- Cards used:
- Chop, Bio, Change
- Cards obtained:
- As part of Super Hero Time, this episode aired alongside Tokusou Sentai Dekaranger episode 3, Episode. 03: Perfect Blue.
- Viewership: 9.5%
- A catch-up of the first twelve episodes of Kamen Rider Blade was aired as part of the Super Hero Max 2012 special event on TV Asahi. 
- This episode is one of only two in Kamen Rider Series history to air on the leap year date, February 29th, the other being episode 22 of Kamen Rider (Skyrider).
- One of the scenes in this episode became infamous among the Japanese fans thanks to Hajime Aikawa's facial expression while threatening to kill Kazuma Kenzaki.
Kamen Rider Blade Volume 2 features episodes 5-8: The Challenge to the Past, Chalice's True Identity, The Trapped Two and The Revived People. It was released on DVD on September 21st 2004, with a total run time of 93 minutes.
Blu-ray Box 1 comes with 16 episodes.