That Is a Heart

is the forty-third episode of Kamen Rider Zero-One and it’s the second part of the four-part endgame. It features Aruto's first transformation into Kamen Rider Ark-One and the second death of Jin.
==Synopsis==
Ironically, it was none other than Aruto who proved that "As long as the malice of humanity exists, the Ark will never die"! After the intense fight against Horobi spurring the destruction of humanity, Izu's loss triggers Aruto's uncontrollable desire for revenge! In order to prevent the escalation of the conflict between Aruto and Horobi, the other Kamen Riders start to make their move! However, such a conclusion can also lead to a great tragedy...
==Plot==
to be added
==Cast==
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**Takahashi is credited as Kamen Rider Ark-One in this episode as opposed to Zero-One.
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*A.I.M.S. Shotriser, MetsubouJinrai Forceriser, ZAIA Thousandriver, ZAIA Slashriser, Attache Weapons, Progrisekeys: , 
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*Narration: 
===Guest Cast===
*: 
===Suit Actors===
*Kamen Rider Ark-One: 
*Kamen Rider Vulcan: 
*Kamen Rider Valkyrie: 
*Kamen Rider Jin: 
*Kamen Rider Horobi: 
*Kamen Rider Thouser: 
==Forms and Collectibles Used==
===Progrisekeys===
*Key Used:
**Vulcan
***Rampage Gatling
**Valkyrie
***Lightning Hornet
**Jin
***Burning Falcon
**Horobi
***Sting Scorpion
**Thouser
***Amazing Caucasus
**Ark-One
***Ark-One
*Form Used:
**Vulcan
***RampageVulcan
**Valkyrie
***Lightning Hornet
**Jin
***Burning Falcon
**Horobi
***Sting Scorpion
===Zetsumerisekeys===
*Key Used:
**Thouser
***Awaking Arsino
==Errors==
*to be added
==Notes==
*As part of Super Hero Time, this episode aired alongside episode 19, .
*Closing Screen Progrisekeys:
**Kamen Riders: Horobi
**Progrisekeys: Incomplete Ark Scorpion (multiple)
*Count at episode end
**Progrisekeys in Zero-Two/Ark-One's possession: Rising Hopper, Biting Shark, Flying Falcon, Flaming Tiger, Freezing Bear, Breaking Mammoth, Shining Hopper, Hopping Kangaroo, MetalCluster Hopper, Zero-Two, Ark-One
**Progrisekeys in Vulcan's possession: Shooting Wolf, Punching Kong, Gatling Hedgehog, Trapping Spider, Assault Wolf, Rampage Gatling
**Progrisekeys in Valkyrie's possession: Rushing Cheetah, Lightning Hornet
**Progrisekeys in Jin's possession: Burning Falcon
**Progrisekeys in Horobi's possession: Sting Scorpion
**Progrisekeys in Thouser's possession: Amazing Caucasus, Sparking Giraffe, Exciting Stag, Crushing Buffalo, Splashing Whale, Dynamaiting Lion, Storming Penguin, Scouting Panda
**Progrisekeys in Azu's possession: Ark Scorpion (incomplete)
**Zetsumerisekeys in Ikazuchi's possession: Dodo
**Zetsumerisekeys in Thouser's possession: Awaking Arsino, Berotha, Kuehne, Ekal, Neohi, Onycho, Vicarya, Gaeru, Mammoth, Arsino
**Zetsumerisekeys in Naki's possession: Japanese Wolf
*The episode marks the final TV appearances of Kamen Riders Thouser, Jin, and Valkyrie.
**This episode also features the final appearance of RampageVulcan and Horobi Sting Scorpion.
*The episode features the second death of Jin after his first death in episode 16.
*This episode also marks the only appearance of Gai Amatsu as Kamen Rider Thouser since episode 39
*The is also the only episode not to feature any form of Zero-One at all, discounting the footage of Zero-One that was displayed via Gai's ZAIA Spec, the five COVID recap specials, and the half-episode.
*This is the only time RampageVulcan performs a standard finisher without using the powers of Rider Models.
*The episode features the destruction of the ZAIA Thousandriver, as well as Isamu Fuwa and Yua Yaiba losing their powers after Ark-One fried their chips.
*This episode features the first appearance of the unfinished Ark Scorpion Progrisekey.
==References==
==External links==
*TV Asahi's official episode guide for ソレが心
*KR Official's official episode guide for ソレが心
*JAE's official episode guide for ソレが心
Category:Rider Death Episode