Katsumi Daido

is the main antagonist of Kamen Rider W Forever: A to Z/The Gaia Memories of Fate. He was an undead mercenary who transformed into .
==History==
===Kamen Rider Eternal===
====Early Life====
As shown in The Beginning of N/Blood and Dream, Katsumi was born with a congenital heart defect. This, combined with a fatal car accident, prompted his mother, Miki Daido, to use her NECRO-OVER project research, based on Philip, to save her son's life as the first Necro-Over, giving him bio-stimulants to age properly. However, despite Katsumi's superhuman combat skills, the Necro-Over project was rejected in favor of the Gaia Memory project, forcing Katsumi and his mother to leave the Foundation. Transforming four people who recently died into Necro-Overs, they founded NEVER. Daido is more refined and enhanced than the other Necro-Overs.
===A to Z/The Gaia Memories of Fate===
====Attack on Futo====
Katsumi was the leader of the organization NEVER that uses the T2 Gaia Memories. He lead the NEVER Dopants created from the T2 Gaia Memories. Katsumi and the other members of NEVER were fighting a terrorist organization in South Asia, where he encountered a Quark named Mina and fell in love with her. After a brief meeting with Jun Kazu, Katsumi gained the experimental Eternal Memory to become Kamen Rider Eternal. But when Doctor Prospect as the Eyes Dopant killed all of the Quarks, supposedly even Mina, Katsumi went mad and killed Prospect with Memory's Maximum Drive. With the Eternal Memory damaged, Katsumi discarded it and decided to wipe out the Museum.
Katsumi first appeared in Futo City attacking the helicopter Tabata is riding in, taking the T2 Eternal Memory and transforming into Eternal. He takes the entire case containing the T2 Gaia Memories and goes to his accomplices. But Tabata activates a switch causing the case and helicopter to explode, scattering the Memories. However, Katsumi survives, and he and his comrades search for the remaining Memories.
====Encounter with Double====
Katsumi then appears at the place the Riders of Futo came to meet Maria S. Cranberry, where he fights Kamen Rider Double as both FangJoker and CycloneJokerXtreme and easily overpowers both forms. He shuts down access to the pre-T2 Gaia Memories, saying that he and Philip are a lot alike, which only makes Philip more livid. After Double is defeated, NEVER claims the 19 T2 Gaia Memories that the Riders found.
With 25 of the 26 T2 Gaia Memories recovered and Philip captured by NEVER, Katsumi reveals his plan to take over and rebuild Futo City in his image, with the people turned into Necro-Overs. Reclaiming the T2 Joker Memory from Philip's partner, Shotaro Hidari, Daido initiates the X-Bicker that will send out a wave to turn everyone into Necro-Overs, despite knowing that they will die as they are not enhanced as Katsumi is. Philip, with help from Shotaro, reactivates their Gaia Memories, and Maria injects a serum into Daido that causes him to start dissolving. In retaliation, Daido shoots Maria in the stomach and takes another serum to stabilize himself which seemed to weaken him.
====Final battle against Double and Death====
They manages to catch up to Katsumi as he transforms into Eternal, but the latter escapes again. Double then catches up and fights Eternal on the Futo Tower using his Half Forms. As he is about to deliver the final blow as CycloneJokerXtreme, Eternal seemed to regain his full strength and goes into his Strengthening Armament mode, using the Zone Memory to summon the other T2 Gaia Memories. He then uses the 'Never Ending Hell Maximum Drive to send Double falling from Futo Tower to his death, but through the support of the citizens of Futo and a strong gust of wind blowing into the Xtreme Memory, Double changes from CycloneJokerXtreme to CycloneJokerGoldXtreme. Eternal then uses his energy to send one blast of energy at Double, but Double counters through the attack and hits Eternal with a kick strong enough to defeat him as well as destroy all 26 T2 Gaia Memories at once. With his very last breath, Katsumi remembers what death feels like.
===Imagin Anime===
====Imagin in Wonderland====
Kamen Rider Eternal and other characters of his respective movie are seen briefly in a poster at the entrances of toei's studio. 
===Type HIGH SPEED! The True Power! Type High Speed is Born!===
Kamen Rider Rider Eternal make a appearance with other Riders and kaijin monsters,when Shinnosuke and Kiriko discover the knock-off versions of the Televi-Kun ,an abandoned warehouse after they meet Roidmude 027.
===Kamen Rider Ghost: Special Event===
Kamen Rider Eternal is revived alongside other Dark Riders led by Shocker Rider No.3 by Shocker with the objective to hunt and destroy Kuroki the traitor. Eternal and the Dark Riders are seen torturing a traitorous Shocker Combatman. Kamen Rider Ghost then appears, with the Dark Riders focusing on him instead. When they seemed to have dominated Kamen Rider Ghost, he then transforms into Grateful Damashii, killing Eternal and Kamen Rider Orga at the same time by Omega Formation (Ryoma and Himiko). 
===Futo Tantei===
Katsumi and his organization NEVER appears in Futo Tantei Chapter 77 Flashback.
==Appearances in other media==
===Kamen Rider W Forever: From A to Z, 26 Rapid-Succession Roars of Laughter===
====The Crisis Called E/The Man That Stole Eternity====
Kamen Rider Eternal is described by Shroud as the only rider who faced Double and Accel. Later, Shroud gives an exercise to Akiko Narumi to see how many ports for the Gaia Memories Kamen Rider Eternal had, Akiko accepts the exercise when he did he said they are 26, but failed when Shroud explained that she forgot a port and it is located in the personal weapon of Kamen Rider Eternal in Eternaledge, implying that they are 27 ports of Gaia Memories. 
==Video Game Appearances==
===Kamen Rider Battle Ganbaride===
Kamen Rider Eternal and Strengthening Armament is a playable character with the other Heisei and Showa Kamen Riders in Kamen Rider Battle Ganbaride.
G8944230.jpg|Kamen Rider Eternal card
g6648168.jpg|Kamen Rider Eternal Strengthening Armament card
===Masked Rider Expansion===
Kamen Rider Eternal appears as a playable character in this trading card game with other Kamen Rider Kamen Rider Heisei-Era, Showa-Era, Super Sentai, Metal Heroes, and other Heroes.
===Kamen Rider Riderbout===
Kamen Rider Eternal and his Strengthening Armament appears as a playable character with the other Heisei and Showa Kamen Riders in Kamen Rider Riderbout.
2cfdb1bb12791fc600e5e87114a436ad.jpg|Eternal as seen in Kamen Rider Riderbout
9cbb51c7662ccaf09b0c0b5094439311.jpeg|Eternal Strengthening Armament as seen in Kamen Rider Riderbout
===HEROES' VS ヒーローズバーサス===
Kamen Rider Eternal appears as a playable character and boss in this crossover video game. Eternal can easily incorporate the short-range SP shock "Eternal Requiem Kick" during the combo, targeting high damage while absorbing SP from the opponent.
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===Kamen Rider Break Joker===
Kamen Rider Eternal and his Strengthening Armament appears as a playable character with other Riders and monsters in Kamen Rider Break Joker.
eternalbreak.jpg|Kamen Rider Eternal Break Joker card
20371685805361cb0cd57040016.png|Kamen Rider Eternal Strengthening Armament Break Joker card
===Kamen Rider: Battride War series===
====Kamen Rider Battride War II====
Katsumi Daido appears in Kamen Rider Battride War II as Kamen Rider Eternal, with Mitsuru Matsuoka reprising his role. While Eternal appeared in the first Battride War game, this version was confirmed to be an entirely new, unidentified character using the Eternal Memory.
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====Kamen Rider Battride War Genesis====
Eternal appears as a playable character in Kamen Rider Battride War Genesis, with Mitsuru Matsuoka reprising his role as Katsumi Daido. Instead of form changes, Eternal can use some of the T2 Gaia Memories to perform special attacks or to enhance his abilities; however, the Memories can't be used consecutively and require the player to wait for the hidden meter to regenerate in order to use another, yet can be filled to hasten the regeneration of the memory uses and make the used Gaia Memories useful again due to regenerating the memory's meter while waiting without being attacked is very slow and may waste time on completing the game's mission. As he was never given his own Rider Machine, Eternal's "fast travel" method instead involves using the T2 Accel Memory to run at super speeds. Eternal's super mode is Strengthening Armament, giving him the attacks he used in his final battle with Double.
*Special Attacks: Combination Punch, Corkscrew Punch (T2 Unicorn Memory (Ground and Air separately), Blazing Uppercut (Aerial Rave Launcher), Blood Hell Blade (Helm Breaker Wave), Eternal Requime, Never-Ending Hell (change to Strengthening Armament)
*T2 Gaia Memory Changes:
**Eternal: Uses the Eternal Requiem Maximum Drive, stunning nearby enemies.
**Heat: Surrounds Eternal with flames, increasing his attack power.
**Metal: Surrounds Eternal with silver flames, increasing his defense and granting super armor.
**Luna: Lets Eternal perform a "shadow clone" attack.
**Trigger: Lets Eternal fire energy bullets from the Eternaledge. Rotatable
*Special Attacks (Strengthening Armament): Bloody Hell Blade (Slash), Never-Ending Hell (Burst and Ball shots separately)
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===Kamen Rider Battle: Ganbarizing===
Kamen Rider Eternal is a playabled character in Kamen Rider Battle: Ganbarizing, also use Strengthening Armament in the video game.
Gbr36-036.jpg|Kamen Rider Eternal card
c2445aad4b791083361752f88cb7c334.png|Kamen Rider Eternal Strengthening Armament card
===Kamen Rider Battle Rush===
Katsumi Daido as Kamen Rider Eternal appears as a playable and support character in the video game Kamen Rider Battle Rush using Eternaledge.
etarnalchibi.JPG|Eternal in Kamen Rider Battle Rush
Chibieternal_requiem.png|Kamen Rider Eternal using Eternal Requiem
finishetarnal.JPG|Kamen Rider Eternal using Never Ending Hell
===Kamen Rider Batton-Line===
Kamen Rider Eternal and his Strengthening Armament form appears as a playable character in Kamen Rider Batton-Line among other Riders in the game.
Eternalbattonline.PNG|Eternal in Batton-Line
Finalformeternalbattonline.PNG|Eternal Strengthening Armament in Batton-Line
===Kamen Rider Transcend Heroes===
Kamen Rider Eternal and Strengthening Armament appears as a playable character with other Kamen Riders in the video game, performing his Eternal Requiem and Never-Ending Hell against his enemies in Kamen Rider Transcend Heroes.
eternalstrangetarmamenttrasend.PNG
===Kamen Rider Buttobasoul===
Kamen Rider Eternal is a playable character in Kamen Rider Buttobasoul.
===Battle Spirits ===
Katsumi Daido as Kamen Rider Eternal appears with other Kamen Riders and Monsters in Battle Spirits.
===Kamen Rider City Wars===
Kamen Rider Eternal and Strengthening Armament is a playable character alongside the other Kamen Riders in Kamen Rider City Wars.
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===Kamen Rider: memory of heroez===
Katsumi Daido/Kamen Rider Eternal appears as an opponent in KAMEN RIDER: memory of heroez. He is revived by ZEUS, the antagonist, along with several others to test the Core Power, with Eternal being the only one to be able to handle it. He fights Double and OOO in hopes of securing his future, but was ultimately defeated by them. He then disintegrates, leaving only his Gaia Memory for Double to get, who also mourns his death. Double then uses his memory to disable the god abilities of the Zeus Memory.
==Personality==
Originally, Katsumi was a gentle child with an affinity for music, as well as being very close to his mother. From his forced resurrection as a Necro-Over though, Katsumi's sense of empathy greatly declined, his mercenary training further corrupting him. However, some of Katsumi's former morality remained inside, to the point of sparing Mina's life in battle. Still capable of feeling sympathy, Katsumi would also attempt to save her and the others from Foundation X's experiments, disgusted at how they were treated. 
Upon his failure to stop Doctor Prospect's cruel actions though, Katsumi forsook all morality, becoming a vicious terrorist. Now driven by his anger and hatred, Katsumi plotted revenge on Museum and Foundation X, setting sights on Futo City. No longer caring what happened to his allies, Katsumi readily sacrificed them for his plans to succeed, to the point of killing Reika and Maria in cold blood. 
Yet, despite his coldness, Katsumi still subconsciously yearned for companionship, expressing joy at the idea of Futo City's residents becoming monsters like him. Furthermore, when defeated by Shotaro and Philip, Katsumi fully embraced his death, seemingly glad that his forced life was finally over. 
== Abilities ==
* Necro-Over capabilities: From the experiments conducted by his mother, Daido possesses superhuman abilities, being the overall strongest among NEVER. 
* Knife wielding: Daido is a master knife wielder, able to counter mid to long-range foes without issue. Most impressively, when fighting with their standard weaponry, Daido defeated Double without receiving a single hit.
* Hand-to-hand combat: Due to his mercenary training, Daido also possesses superb skills in hand-to-hand combat. During his fist fight against a fatigued Shotaro, Daido barely received any hits whatsoever; ultimately winning within a minute. 
* Leadership
==Kamen Rider Eternal==
==Equipment==
===Devices===
*Lostdriver - Transformation belt
*Gaia Memories - Transformation trinkets
**T2 Gaia Memory - Next generation Gaia Memories
===Weapon===
*Eternaledge - Eternal's personal weapon
==Legend Rider Devices==
==Family==
*Maria S. Cranberry - Mother
==Behind the Scenes==
===Portrayal===
*Katsumi Daido is portrayed by . As a teenager, he is portrayed by , who also portrayed the lead role of Philip, a fact that is considered a plot twist in the film that which Katsumi first appears in. 
**In video games, Katsumi was voiced by Ryosuke Kanemoto in Kamen Rider: Super Climax Heroes and Yuichi Nakamura in KAMEN RIDER: memory of heroez.
*As Kamen Rider Eternal, his suit actor is .
===Dub names===
In the Korean Book of Masked Rider Encyclopedia 21st Century and Korean dub of Kamen Rider Zi-O entitled Masked Rider Zi-O (가면라이더 지오 gamyeonlaideo jio), which aired in South Korea, Katsumi Daido is renamed Ki Tae-won (기태원 gitaewon).
===Concept Art===
==Notes==
*Matsuoka based his performance on both Char Aznable from the Mobile Suit Gundam franchise and Vegata from the Dragon Ball franchise.Character Book 2 2010 , pp. 18–19, “Mitsuru Matsuoka x Jun Watanabe/Conversation”
*The blue hair streak that Katsumi wears in the film was a personal item owned by Matsuoka. It was meant to hide a wound that Matsuoka suffered from while filming, which he was scolded on as the producers found out later on.Character Book 2 2010 , pp. 16–17, “Mitsuru Matsuoka/Interview”
==Appearances==
==External Links==
*Kamen Rider Zukan page on Katsumi Daido.
*Kamen Rider Zukan page on Kamen Rider Eternal.
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