History TearJerker / KamenRiderBuild

** Unfortunately this gets Jossed, as in [[Film/KamenRiderOOO10thCoreMedalOfResurrection OOO 10th]], [[spoiler:[[Main/StupidSacrifice Eiji dies anyways]]]]

[[folder:'''Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!''']]
* Kazumi is ''furious'' that Massugu let himself be experimented on, just so he could return the favor to Kazumi. It's the same with the Hokuto Three Crows too and he feels horrible for endangering them all. Thankfully, Massugu went home and survived, turning up again when Namba had the workers on Kazumi's farm rounded up to be killed by Gentoku.

* According to Soichi, Sento is as lost as Ryuga and his nice persona (that Ryuga just called God-like and Buddha-like) is how he copes with his IdentityCrisis. He doesn't know who he is, so he tries to set a new identity for himself by being the good guy.

[[quoteright:280:https://static.tvtropes.org/pmwiki/pub/images/rsz_depressed_sento.jpg]]
[[caption-width-right:280:''"Even if he wants to transform, he handed all the bottles over to the government. Besides... [[HeroicBSOD He's in no condition to fight.]]"'']]

-->'''Ryuga:''' I got Evolt's DNA in me. It makes sense for me to go down with him
* More of a meta example, but the opening credits are shown to be rather sparse with bits of where cast would normally be listed being blank because so many characters are now dead and Evolt has devastated the country so much there's no guest characters showing up either. Even the Japan Action Enterprise stunt team, which usually fills the majority of the screen only lists the suit actors for Build, Cross Z, Rogue, and Evolt. All the other suit characters are dead.

** Unfortunately this gets [[Main/Jossed]], as in [[Film/KamenRiderOOO10thCoreMedalOfResurrection OOO 10th]], [[spoiler:[[Main/StupidSacrifice Eiji dies anyways]]]]

[[folder:'''Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!''']]
* Kazumi is ''furious'' that Massugu let himself be experimented on, just so he could return the favor to Kazumi. It's the same with the Hokuto Three Crows too and he feels horrible for endangering them all. Thankfully, Massugu went home and survived, turning up again when Namba had the workers on Kazumi's farm rounded up to be killed by Gentoku.
[[/folder]]

* A meta example. This episode aired very close to Christmas[[note]]This episode aired on December 24th[[/note]], but beside a mention and small celebration in the recap there wasn't even a mention of the holiday in episode itself. This shows that the events that befall to the cast makes them unable to even celebrate a holiday that normally brings people love and peace. Even worse is that Gentoku made a declaration of war in this episode which will bring lots of pain and grief through the entire series.

* Fu taking the blow of a Black Hole Finish from Evol in order to protect Ryuga. The blow is fatal and Fu dies in Ryuga's arms.
** What's worse is Ryuga's reaction to him dying. He desperately tries to grasp at the fading motes left behind before punching the ground in anger.
** From a meta perspective, the death of the characters becomes worse with the knowledge of their suit actor passing away as well.

* Misora tells Kazumi why she never called him by his name. She was afraid doing so would wind up causing him to hit a Death Flag and was afraid she'd lose him. Unfortunately, she's admitting this ''as Kazumi is dying.'' The last thing he sees is her hugging him close and begging him to not die. He's crying during the exchange too and tells her he regrets knowing that he's leaving the nascita crew behind.]
** Misora finally calls him "Kazumin"... After he's died.

* Misora witnessing Kazumi use the Grease Blizzard once again brings a moment of despair due to her remembering the last time he used that form,''it killed him.'' Luckily he survives this time around.

* Misora witnessing Kazumi use the Grease Blizzard once again brings a moment of despair due to her remembering the last time he used it it ''killed him.'' Luckily he survives this time around.

Much like [[Series/KamenRiderExAid Ex-Aid]], ''Build'' manages to balances its outlandish humor with moments that punch you right in the gut when you least expect it.

''Are you ready?''

* Nabeshima turns out to be alive after the events of #3, but being turned into Smash ''twice'' made him forget everything. He doesn't recognize Ryuga and [[AdultFear what's worse]], he doesn't recognize his family either including his daughter.

* Ryuga's anger and increased Hazard Level waver when Gentoku hits him with a cruel reveal. Stalk ''knew'' Kasumi didn't have a high enough Hazard Level to survive exposure to Nebula Gas and did so anyway so her death would ''cause Ryuga's Hazard Level to grow higher due to anger.'' Whatever Stalk's, or rather ''Evolto's'' plan is required Ryuga suffering the death of the woman he loved.

* Misora got hit real hard this episode. She found out that her own father hasn't been in control of himself for ''ten years'' and she was talking to a ''genocidal alien maniac'' [[DemonicPossession wearing his face]]. Then when Rogue knocks Stalk out of his transformation, Misora can only see her father in pain, and tries to help him, only for [[SmugSnake Utsumi]] to take advantage and give Evolto the tool he needed, and ''[[TraumaCongaLine then]]'' she had to watch her father's hands be used to ''murder'' Taizan in front of her eyes.

* The title couldn't be more fitting as the "Best Match" in question is of the one established back in the beginning. Sento and Ryuga. After his final clash with Evolto, Ryuga winds up getting possessed by the genocidal alien after one ''hell'' of a HopeSpot. The way Kazumi starts shaking his head like he doesn't want to believe what he's seeing is true when Ryuga starts talking with Evolt's voice is ''heartbreaking''.
** What's worse, we don't see Soichi after the final clash, leaving his fate ambiguous. Is he finally free of Evolto after a decade of horrifying servitude, or did Soichi actually ''die'' in that clash? Thankfully the next episode reveals that he's alive but catatonic.
** And it's all punctuated by Evolto transforming into Dragon Form, reducing the proud and Badass Cross-Z to nothing more than a ''form change for himself.'' That evil laugh the Evol Driver makes at the end feels like Evolto laughing cruelly at the heroes as they watch their friend become their greatest enemy.
* Misora grabbing Evolto and angrily/sobbingly screaming for it to give her her father back.

* Evolto spends all of Sento's desperate and [[HopelessBossFight hopeless]] attempt to defend the Pandora's Box explaining everything about how Ryuga and he are two halves of the same whole, thoroughly pummeling Sento in the process. Once Sento's beaten and can't even stand anymore however, Evolto decides to [[KickThemWhileTheyAreDown torment Sento more]] by explaining about how he threatened Shinobu Katsuragi, Sento's dad, into repairing the Evol Driver and how [[MyGodWhatHaveIDone the guilt he felt for aiding the genocidal alien was very likely the real reason]] Shinobu was DrivenToSuicide. Evolto explains this so casually and flippantly, there's no way he wasn't explaining it for the sole purpose of hurting Sento.

** Evolto copying Ryuga's voice is also a cruel HopeSpot for the viewer. Thought that maybe ThePowerOfFriendship would force Evolto out and allow the heroes to stop the Pandora Tower from forming because we've still got many episodes to go until the finale? ''Wrong.''

[[folder:Episode 36: '''The Star Hunting Evolto''']]

* Misora trying to yell some sense into Sento when he is about to leave for his final battle with Evolto, extending to when Sento plans to use the Pandora panel to unleash a suicide attack against Evolto. She doesn't want to lose anyone else.
* Ryuga's horrified reaction when he wakes up, only to find out that Evolto has possessed Sento.

* Ryuga can't transform because Evolto has taken all of his essence when he left his body. He tries to fight and desperation has him tackle Evolto and take the Dragon [=EvolBottle=] from his belt. He then proceeds to try and punch Evolto out of Sento with predictable results.
** [[SarcasmMode It gets better]]. He manages to fix that, but then the combined attacks of Cross-Z Magma, Grease and Rogue [[GoodJobBreakingItHero unlocks]] the Evol Trigger]]. This, in turn makes Evolto leave Sento, which is good only until he wakes up and [[IdentityAmnesia proclaims]] himself to be Takumi Katsuragi. Ryuga's OhCrap is ''very'' justified.
* Ryuga's attempt to convince Gentoku to help him fight against Evolto and rescue Sento. Gentoku tries to dissuade him from trying by reminding him that he's responsible for Kasumi's death but Ryuga breaks down and admits that he just doesn't want to lose the people he has left. Unfortunately Gentoku responds that he can't help because the Rider System responds to the user's emotions, which would make him less useful as he's still in the throes of a HeroicBSOD following his father's death.

* Katsuragi talks about the original intention behind the Rider System - fighting Evolto. He is heartbroken upon finding out that Gentoku used it to start a war between the regions and tears him a new one for doing so. Still, he admits he played a part in it, too.

* Katsuragi sounds so ''small'' when he's lamenting that another life has been lost, crying at the deaths of Rai and Fu. Coupled with the revelations that he constructed the Rider System to defeat Evolto and fulfill his father's last wish, it seems like people dying as a result of that goal is something of a TraumaButton for him. One has to wonder if he had a similar reaction every time a Smash subject died.

* Takumi Katsuragi remembers being Sento and, realizing just how his quest to destroy Evolto negatively impacted his own personality, relents his place as the main personality of their body to him. The next episode lessens the impact somewhat by revealing that Sento can still contact Takumi.

* The reason for the Best Matches is revealed. When Evolto possessed Soichi, he probed his memories for thirty things that he liked. Soichi replied with thirty things that he remembered that Misora liked and those became the Organic Fullbottles. Then, Evolto probed for things that could ''destroy'' those things. At first he got straight answers such as tanks and gatling guns, but then Soichi started giving nonsensical answers such as erasers and comics because he wanted to protect the things that his daughter loved. This serves as a cruel reminder that Soichi was just a normal man who was exploited by an evil being who wanted to destroy everything he cared about.

* Evolto declares himself the country's leader and is accepted by happy crowds. This makes Gentoku question if he can fulfill his father's wish and Utsumi takes the oppurtunity to demoralize him as much as possible. This nearly ends with Gentoku dead as he can't fight unless he gathers all the shaky faith he has.

** Kazumi is mad at Sento, but also wants him to acknowledge the truth because that might hurt less than holding on a false truth. Seeing no response, he claims not to trust Sento anymore and goes off on his own. Gentoku tells Sento that he is too wrapped up in believing his father and follows Kazumi. Blindly following his ideas was pretty much Gentoku's FatalFlaw as Night Rogue and helped Evolto steer him right where he needed him.

[[folder:Episode 44: '''The End Of Evolto''']]
* Evolto tells Sento that either he gets CD Lost Bottle or he will murder everyone Sento cares about without breaking a sweat. This makes Sento throw his phone against the pavement in anguish and go out to fight Evolto while everyone else is asleep to keep them out of danger. Ryuga, Kazumi and Gentoku are hurt/angered by what they perceive as Sento's lack of trust in them.
* Perhaps this episodes crowning moment of TearJerker, Sento's father pulled a ''XanatosGambit'' on him. He showed the weakness of the Triggers, both Hazard and Evol, so the Kamen Riders would defeat Evolto and purify the Lost Bottles. But if Evolto won, then they would still get the test subjects needed for the remaining Lost Smash. Either way, Evolto ''won''. Thankfully, the next episode confirmed that Shinobu had pulled a fast one on Evolto and was only thwarted by Evolto [[OutGambitted having contingencies in place.]]

* Evolto split off a part of himself to create fake Hokuto Trio specifically to stab Kazumi in the back and twist the knife full cirle. Kazumi fights them, but can't hurt them. Beaten down, he recounts how their deaths permanently damaged him and apologizes for breaking his promise to Sento. He is not coming back from this battle.

* Utsumi puts his all into fighting Evolto, is fatally wounded by overusing the Evol Driver and then killed by Evolto when he shields Gentoku and Sawa with his body.

* Sento's scream at the end where Evolto waltzes in like nobody business is all his guilt, sorrow and anger condensed into one word. He looks ready to strangle him barehanded if given a chance.
-->'''Sento:''' '''''[[SayMyName EVOLTOOO!!!]]'''''

* If Kazumi's death wasn't enough, the previews show that Gentoku is the next one on the chopping block. He ends up dying, attempting to immobilize Evolto by damaging his Evol Trigger. It ends up successful after his death.
* In the last minutes of the episode, Ryuga knocks aside Sento and forces him out of his transformation as Sento was going to sacrifice himself to destroy Evolto, only to do it ''himself'' and tell his friend "Thanks" before flying himself and Evolto into the distortion to complete the fusion of the two Earths.

-->'''Ryuga:''' I got Evolto's DNA in me. It makes sense for me to go down with him

* Yui and her students. They [[HopeSpot saw Cross-Z, who ignored them]] and ran off to fight more Guardians. Then they were taken by Faust and turned into [[TragicMonster Lost Smash]], ''then'' [[TraumaCongaLine tortured until they died]] and perfected the Lost Bottles for Evolto. And Yui ''remembers this''. And her students are left in a coma from the Nebula Gas still in their systems.
* [[ButForMeItWasTuesday Evolto casually revealing that Banjo's parents were killed by him]] to escalate Banjo's Hazard Level. Banjo is visibly ''shaking'' before he cleans Evolto's clock. Evolto has long since passed the MoralEventHorizon, but he appears to have a knack for finding shovels to keep digging himself deeper.
* When Evolto discusses how Kilbus destroyed Planet Blood, he sounds oddly sorrowful, indicating that he had fond memories of his homeworld, or perhaps [[EvenEvilHasLovedOnes the people on it]]. Whatever the case, it's obvious that Killbus is a major part of what drove Evolto to become the PlanetEater he is in the show. This also indicates that without Kilbus, it's possible Evolto may have had noble qualities, and that the loss of his home and loved ones sent Evolto over the DespairEventHorizon and straight into the looney bin.

[[caption-width-right:280:''"Even if he didn't want to, he handed all the bottles over to the government. Besides... He'' can't ''like that."'']]

* Burn Smash, this episode's MOTW, is Ryuga's girlfriend. Unlike other Smash, her body is so weak that defeating will outright kill her instead of separating the Smash essence from her body. Despite this, rather than harming Ryuga, she turns her on flames on herself, until Sento [[MercyKill Mercy Kills]] her, allowing Ryuga and Kasumi only a brief moment to reconnect before she dies.

* Sento's plan succeeds, but there's no a place for him in the new world. Because "Sento Kiryu" was created by the old world, nobody remembers him (Misora has a brief moment of "Have we met before?" but that's it) and there isn't a place for him, either as Takumi Katsuragi or Taro Sato (he exists as his own person, and Soichi mistakes him for Sato). He's essentially become a nomad, though this is mitigated when he finds out that Banjo is there too.]]

* Kazumi is ''furious'' that Massugu let himself be experimented on, just so he could return the favor to Kazumi. It's the same with the Hokuto Three Crows too and he feels horrible for endangering them all. [[spoiler:Thankfully, Massugu went home and survived, turning up again when Namba had the workers on Kazumi's farm rounded up to be killed by Gentoku.]]

[[caption-width-right:280:''"Even if he wanted to, he handed all the bottles over to the government. Besides... He'' can't ''like that."'']]

[[folder:Episode 36: '''The Star Hunting Evolt''']]

* Sento's plan succeeds, but there's no a place for him in the new world. Because "Sento Kiryu" was created by the old world, nobody remembers him (Misora has a brief moment of "Have we met before?" but that's it) and there isn't a place for him, either as Takumi Katsuragi or Taro Sato (he exists as his own person, and Soichi mistakes him for Sato). He's essentially become a nomad, though this is mitigated when he finds out that Banjou is there too.]]

[[folder: Episode 20: '''The Devil's Trigger''']]

[[folder: Episode 21: '''The Unstoppable Hazard''']]

* Seito, now under Nanba's control, declares further war efforts against Touto and even puts the blames on Touto for this.

** And it's all punctuated by Evolto transforming into Dragon Form, reducing the proud and Badass Cross-Z to nothing more than a ''form change for himself.'' That evil laugh the Evol Driver makes at the end feels like Evolt laughing cruelly at the heroes as they watch their friend become their greatest enemy.

* Evolto tells Sento that either he gets CD Lost Bottle or he will murder everyone Sento cares about without breaking a sweat. This makes Sento throw his phone against the pavement in anguish and go out to fight Evolt while everyone else is asleep to keep them out of danger. Ryuga, Kazumi and Gentoku are hurt/angered by what they perceive as Sento's lack of trust in them.

* If Kazumi's death wasn't enough, the previews show that Gentoku is the next one on the chopping block. He ends up dying, attempting to immobilize Evolt by damaging his Evol Trigger. It ends up successful after his death.

[[folder: Final Episode: '''The World Build Created''']]

* Kazumi is ''furious'' that Massugu let himself be experimented on, just so he could return the favor to Kazumi. It's the same with the Hokuto Three Crows too and he feels horrible for endangering them all. [[spoiler:Thankfully, Massugu went home and survived, turning up again when Nanba had the workers on Kazumi's farm rounded up to be killed by Gentoku.]]

[[quoteright:284:https://static.tvtropes.org/pmwiki/pub/images/rsz_depressed_sento.jpg]]
[[caption-width-right:284:''"Even if he wanted to, he handed all the bottles over to the government. Besides... He'' can't ''like that."'']]

[[folder: Episode 1: '''These Guys Are a Best Match''']]
* Ryuuga saying that he may be stupid and basically trash, but he would never kill anyone. And [[HeroicSelfDeprecation meaning it]]. It's heartbreaking to see the poor guy look like he's on the verge of breaking down over the fact that ''no one believes him''.

[[folder: Episode 2: '''The Innocent Runaway''']]
* Burn Smash, this episode's MOTW, is Ryuuga's girlfriend. Unlike other Smash, her body is so weak that defeating will outright kill her instead of separating the Smash essence from her body. Despite this, rather than harming Ryuuga, she turns her on flames on herself, until Sento [[MercyKill Mercy Kills]] her, allowing Ryuuga and Kasumi only a brief moment to reconnect before she dies.

-->'''Ryuuga:''' Don't be stupid! As if there could be a life better than this! For me... meeting you... gave me the greatest happiness.
* Ryuuga's DespairEventHorizon and his following [[GetAHoldOfYourselfMan exchange]] with Sento.

--> '''Ryuuga''': It's fine. It's doesn't matter anymore.
--> '''Sento''': What is? What's fine about this? Nothing about this is fine! ''(shakes Ryuuga)'' If you get caught now, you'll go back to being a murderer! And that's fine?! ''(shakes Ryuuga again and pushes him away)'' You think that's what she would want?!

[[folder: Episode 4: '''The Testimony Will Be Zero''']]
* Nabeshima turns out to be alive after the events of #3, but being turned into Smash ''twice'' made him forget everything. He doesn't recognize Ryuuga and [[AdultFear what's worse]], he doesn't recognize his family either including his daughter.
** His daughter promises to teach him how to do the cat's cradle and help him get his memory back
** Ryuuga sobs when he realizes that Nabeshima genuinely doesn't remember him as it ensures his life will remain in ruins.
* Knowing that Nabeshima saw a similar panel in Faust's lab and that Pandora's Box is missing two of its side panels, Sento digs the bottle matcher out of the wall to make sure. His suspicion proves to be right and he confronts Souichi, heartbroken that his adoptive family lied to him.

[[folder: Episode 5: '''Dangerous Identity''']]
* Think about Tatsuya for a moment there. He gets to meet his BFF again after a year only to find a completely different person without any memory of him. Sato Taro is there talking to him and yet is effectively dead.

[[folder: Episode 6: '''Moonsault of Anger''']]
* According to Souichi, Sento is as lost as Ryuuga and his nice persona (that Ryuuga just called God-like and Buddha-like) is how he copes with his IdentityCrisis. He doesn't know who he is, so he tries to set a new identity for himself by being the good guy.

[[folder: Episode 8: '''What The Memories Tell You''']]
* Katsurugi's father worked as a supervisor of Pandora Box and was DrivenToSuicide by the pressure put on him from all sides blaming him for the Sky Wall incident.
* Ryuuga complains that Mrs. Katsurugi's fried egg rolls, Her dead son's favorite, are too sweet. Sento tastes them and tells Ryuuga off for not liking them. Then his eyes water and he starts crying while eating them for reasons he can't explain due to his lost memories.

[[folder: Episode 9: '''Project Build Trap''']]

[[folder: Episode 11: '''Burn, Dragon!''']]
* Kasumi wrote Ryuuga a [[DeadManWriting letter]], starting with saying that she will probably be dead by the time he gets to read it and that he should [[IWantMyBelovedToBeHappy get over her]].

[[folder: Episode 12: '''The Theory Of Conspiracy''']]

[[folder: Episode 13: '''Who Takes Off The Veil''']]
* Seeing everything crash around Sento. Soichi is Blood Stalk, who framed Ryuuga and manipulated pretty much everything and everyone into his plans. The realization only really starts setting in in #14, but he is still very distraught just by the possibility and it only becomes worse upon confirming it.

[[folder: Episode 14: '''The False Kamen Rider''']]
* The preview alone starts with a low blow, with Souichi saying that Sento “was just playing the role of a hero”.
* There’s something tragic about the TV debut of [=RabbitTank=] Sparkling and the fact it’s first opponent will be Souichi.
* Sento's having flashback about his time with Souichi during his fight with the Blood Stalk. It hurts so much he slowly stops fighting or even defending himself.

* Imagine what Misora would feel when she finds out truth. Her father was basically using her the whole time, a member of Faust and had caused the death of many innocent people. She would not be happy for sure. Sento and Ryuuga had decided not to confront her about the full truth about what happened with Souichi but it is doubtful that they will be able to conceal the truth forever.

[[folder: Episode 15: '''Judging Sento Kiryu''']]

** What makes it worse is Souichi tries to throw her off the trail with a joke about growing coffee beans. The flashbacks to he and Misora laughing together while working at nascita imply that he might [[BecomingTheMask have genuinely started to care for her.]]

[[folder: Episode 16: '''Weaponry Hero''']]

[[folder: Episode 17: '''The Outbreak of Rider Wars''']]

[[folder: Episode 18: '''The Golden Warrior''']]

[[folder: Episode 19: '''The Forbidden Item''']]

* Ryuga talks to Misora about how he doesn't want to watch Sento suffer so he uses the Sclash driver to fight for early end of the war.

[[folder: Episode 22: '''Tearful Victory''']]

[[folder: Episode 23: '''Western Phantom''']]

[[folder: Episode 25: '''The Idol Awakens''']]

[[folder: Episode 26: '''Treacherous Deathmatch''']]

* In the end, everything heartwarming about Sawa's relationship with the main cast was for nothing since it turns out she's a [[{{Brainwashed}} Nanba Child]]. Everything, from the very beginning to her seeming HeelFaceTurn was ''fake''.

[[folder: Episode 27: '''Hero's Counterattack''']]

[[folder: Episode 28: '''The Genius Comes On A Tank''']]
* During Sawa confessing to Sento that she's a Nanba Child, she also explains that during her time with the heroes she felt actual familial warmth for the first time. This lead to a conflict of interest with her orders from Nanba to ''kill herself before she could be captured'' and caused her to realize two things. One: Nanba doesn't give a damn about her no matter how loyal she is, and Two: [[BecomingTheMask she's become the mask.]] All of this makes it even more heartwarming when Sento still accepts and cares about her.

[[folder: Episode 29: '''The Opening Bell Rings''']]

[[folder: Episode 30: '''The Truth of Pandora's Box''']]
* TheReveal that Souichi has been [[DemonicPossession possessed]] the whole time, with the dialogue indicating he's been '''[[AndIMustScream aware]]''' but unable to control his own body--meaning that he's had to watch as the thing possessing him not only commits atrocities against others, but also psychologically traumatizes and deceives his own '''daughter'''.
** That's not even getting into how hard Souichi must have been mentally screaming in terror as whatever is possessing him tried to ''murder'' Misora at the start of the episode.

[[folder: Episode 31: '''Surging Magma!''']]
* Ryuga's anger and increased Hazard Level waver when Gentoku hits him with a cruel reveal. Stalk ''knew'' Kasumi didn't have a high enough Hazard Level to survive exposure to Nebula Gas and did so anyway so her death would ''cause Ryuga's Hazard Level to grow higher due to anger.'' Whatever Stalk's, or rather ''Evolt's'' plan is required Ryuga suffering the death of the woman he loved.

[[folder: Episode 32: '''Programmed Tragedy''']]

[[folder: Episode 33: '''Final Weapon: Evol''']]

* Misora got hit real hard this episode. She found out that her own father hasn't been in control of himself for ''ten years'' and she was talking to a ''genocidal alien maniac'' [[DemonicPossession wearing his face]]. Then when Rogue knocks Stalk out of his transformation, Misora can only see her father in pain, and tries to help him, only for [[SmugSnake Utsumi]] to take advantage and give Evolt the tool he needed, and ''[[TraumaCongaLine then]]'' she had to watch her father's hands be used to ''murder'' Taizan in front of her eyes.

* The title couldn't be more fitting as the "Best Match" in question is of the one established back in the beginning. Sento and Ryuga. After his final clash with Evolt, Ryuga winds up getting possessed by the genocidal alien after one ''hell'' of a HopeSpot. The way Kazumi starts shaking his head like he doesn't want to believe what he's seeing is true when Ryuga starts talking with Evolt's voice is ''heartbreaking''.
** What's worse, we don't see Souichi after the final clash, leaving his fate ambiguous. Is he finally free of Evolt after a decade of horrifying servitude, or did Souichi actually ''die'' in that clash? Thankfully the next episode reveals that he's alive but catatonic.
** And it's all punctuated by Evolt transforming into Dragon Form, reducing the proud and Badass Cross-Z to nothing more than a ''form change for himself.'' That evil laugh the Evol Driver makes at the end feels like Evolt laughing cruelly at the heroes as they watch their friend become their greatest enemy.
* Misora grabbing Evolt and angrily/sobbingly screaming for it to give her her father back.

* Evolt spends all of Sento's desperate and [[HopelessBossFight hopeless]] attempt to defend the Pandora's Box explaining everything about how Ryuga and he are two halves of the same whole, thoroughly pummeling Sento in the process. Once Sento's beaten and can't even stand anymore however, Evolt decides to [[KickThemWhileTheyAreDown torment Sento more]] by explaining about how he threatened Shinobu Katsuragi, Sento's dad, into repairing the Evol Driver and how [[MyGodWhatHaveIDone the guilt he felt for aiding the genocidal alien was very likely the real reason]] Shinobu was DrivenToSuicide. Evolt explains this so casually and flippantly, there's no way he wasn't explaining it for the sole purpose of hurting Sento.

** Evolt copying Ryuga's voice is also a cruel HopeSpot for the viewer. Thought that maybe ThePowerOfFriendship would force Evolt out and allow the heroes to stop the Pandora Tower from forming because we've still got many episodes to go until the finale? ''Wrong.''

[[folder: Episode 36: '''The Star Hunting Evolt''']]

* Misora trying to yell some sense into Sento when he is about to leave for his final battle with Evolt, extending to when Sento plans to use the Pandora panel to unleash a suicide attack against Evolt. She doesn't want to lose anyone else.
* Ryuga's horrified reaction when he wakes up, only to find out that Evolt has possessed Sento.

[[folder: Episode 37: '''The Ultimate Phase''']]
* Ryuga can't transform because Evolt has taken all of his essence when he left his body. He tries to fight and desperation has him tackle Evolt and take the Dragon [=EvolBottle=] from his belt. He then proceeds to try and punch Evolt out of Sento with predictable results.
** [[SarcasmMode It gets better]]. He manages to fix that, but then the combined attacks of Cross-Z Magma, Grease and Rogue [[GoodJobBreakingItHero unlocks]] the Evol Trigger]]. This, in turn makes Evolt leave Sento, which is good only until he wakes up and [[IdentityAmnesia proclaims]] himself to be Takumi Katsuragi. Ryuga's OhCrap is ''very'' justified.
* Ryuga's attempt to convince Gentoku to help him fight against Evolt and rescue Sento. Gentoku tries to dissuade him from trying by reminding him that he's responsible for Kasumi's death but Ryuga breaks down and admits that he just doesn't want to lose the people he has left. Unfortunately Gentoku responds that he can't help because the Rider System responds to the user's emotions, which would make him less useful as he's still in the throes of a HeroicBSOD following his father's death.

[[folder: Episode 38: '''Mad World''']]

* Katsuragi talks about the original intention behind the Rider System - fighting Evolt. He is heartbroken upon finding out that Gentoku used it to start a war between the regions and tears him a new one for doing so. Still, he admits he played a part in it, too.

* Katsuragi sounds so ''small'' when he's lamenting that another life has been lost, crying at the deaths of Rai and Fu. Coupled with the revelations that he constructed the Rider System to defeat Evolt and fulfill his father's last wish, it seems like people dying as a result of that goal is something of a TraumaButton for him. One has to wonder if he had a similar reaction every time a Smash subject died.

[[folder: Episode 39: '''Unstoppable Genius''']]

* Katsuragi Takumi remembers being Sento and, realizing just how his quest to destroy Evolt negatively impacted his own personality, relents his place as the main personality of their body to him. The next episode lessens the impact somewhat by revealing that Sento can still contact Takumi.

[[folder: Episode 40: '''Revolution of the End''']]

[[folder: Episode 41: '''The Truth of the Best Matches''']]
* The reason for the Best Matches is revealed. When Evolt possessed Soichi, he probed his memories for thirty things that he liked. Soichi replied with thirty things that he remembered that Misora liked and those became the Organic Fullbottles. Then, Evolt probed for things that could ''destroy'' those things. At first he got straight answers such as tanks and gatling guns, but then Soichi started giving nonsensical answers such as erasers and comics because he wanted to protect the things that his daughter loved. This serves as a cruel reminder that Soichi was just a normal man who was exploited by an evil being who wanted to destroy everything he cared about.

[[folder: Episode 42: '''Legacy Of Doubt''']]
* Evolt declares himself the country's leader and is accepted by happy crowds. This makes Gentoku question if he can fulfill his father's wish and Utsumi takes the oppurtunity to demoralize him as much as possible. This nearly ends with Gentoku dead as he can't fight unless he gathers all the shaky faith he has.

[[folder: Episode 43: '''Another Build''']]

** Kazumi is mad at Sento, but also wants him to acknowledge the truth because that might hurt less than holding on a false truth. Seeing no response, he claims not to trust Sento anymore and goes off on his own. Gentoku tells Sento that he is too wrapped up in believing his father and follows Kazumi. Blindly following his ideas was pretty much Gentoku's FatalFlaw as Night Rogue and helped Evolt steer him right where he needed him.

[[folder: Episode 44: '''Evolt's End''']]
* Evolt tells Sento that either he gets CD Lost Bottle or he will murder everyone Sento cares about without breaking a sweat. This makes Sento throw his phone against the pavement in anguish and go out to fight Evolt while everyone else is asleep to keep them out of danger. Ryuga, Kazumi and Gentoku are hurt/angered by what they perceive as Sento's lack of trust in them.
* Perhaps this episodes crowning moment of TearJerker, Sento's father pulled a ''XanatosGambit'' on him. He showed the weakness of the Triggers, both Hazard and Evol, so the Kamen Riders would defeat Evolt and purify the Lost Bottles. But if Evolt won, then they would still get the test subjects needed for the remaining Lost Smash. Either way, Evolt ''won''. Thankfully, the next episode confirmed that Shinobu had pulled a fast one on Evolt and was only thwarted by Evolt [[OutGambitted having contingencies in place.]]

[[folder: Episode 45: '''Hope's Scientist''']]

[[folder: Episode 46: '''An Oath to Be the One''']]

* Evolt split off a part of himself to create fake Hokuto Trio specifically to stab Kazumi in the back and twist the knife full cirle. Kazumi fights them, but can't hurt them. Beaten down, he recounts how their deaths permanently damaged him and apologizes for breaking his promise to Sento. He is not coming back from this battle.

[[folder: Episode 47: '''Frozen Flame''']]

* Utsumi puts his all into fighting Evolt, is fatally wounded by overusing the Evol Driver and then killed by Evolt when he shields Gentoku and Sawa with his body.

* Sento's scream at the end where Evolt waltzes in like nobody business is all his guilt, sorrow and anger condensed into one word. He looks ready to strangle him barehanded if given a chance.
-->'''Sento:''' '''''[[SayMyName EVOLT!!!]]'''''

[[folder: Episode 48: '''To The World of Love & Peace''']]

* In the last minutes of the episode, Ryuga knocks aside Sento and forces him out of his transformation as Sento was going to sacrifice himself to destroy Evolt, only to do it ''himself'' and tell his friend "Thanks" before flying himself and Evolt into the distortion to complete the fusion of the two Earths.

-->'''Ryuga:''' I got Evolt's DNA in me. It makes sense for me to go down with him]

** However, it's actually worse for Banjou: There's already a Ryuga Banjou in this world, one who's a successful MMA fighter and whose girlfriend Kasumi is alive and well. And original!Banjou is fully aware of this, meaning he gets to see what his life could have been but will never be.

* Kazumi is ''furious'' that Massugu let himself be experimented on, just so he could return the favor to Kazumi. It's the same with the Hokuto Three Crows too and he feels horrible for endangering them all. [[spoiler: Thankfully, Massugu went home and survived, turning up again when Nanba had the workers on Kazumi's farm rounded up to be killed by Gentoku.]]

* Yui and her students. They [[HopeSpot saw Cross-Z, who ignored them]] and ran off to fight more Guardians. Then they were taken by Faust and turned into [[TragicMonster Lost Smash]], ''then'' [[TraumaCongaLine tortured until they died]] and perfected the Lost Bottles for Evolt. And Yui ''remembers this''. And her students are left in a coma from the Nebula Gas still in their systems.
* [[ButForMeItWasTuesday Evolt casually revealing that Banjou's parents were killed by him]] to escalate Banjou's Hazard Level. Banjou is visibly ''shaking'' before he cleans Evolt's clock. Evolt has long since passed the MoralEventHorizon, but he appears to have a knack for finding shovels to keep digging himself deeper.
* When Evolt discusses how Kilbus destroyed Planet Blood, he sounds oddly sorrowful, indicating that he had fond memories of his homeworld, or perhaps [[EvenEvilHasLovedOnes the people on it]]. Whatever the case, it's obvious that Kilbus is a major part of what drove Evolt to become the PlanetEater he is in the show. This also indicates that without Kilbus, it's possible Evolt may have had noble qualities, and that the loss of his home and loved ones sent Evolt over the DespairEventHorizon and straight into the looney bin.

[[/folder]]

* A moment from the end of the episode as Kazumi transforms using the Blizzard Knuckle knowing full-well that it could and probably ''will'' [[DeathSeeker kill him.]]

** Even worse, we later find out that the people present when the Pandora Box was activated had their personalities inverted, with even good, kind-hearted people becoming violent, belligerent, and warlike. Imagine what it must have been like for their families and loved ones to suddenly have someone they cared about literally become a completely different person overnight, potentially ending those relationships. [[spoiler:It's no wonder that Tajimi was struck with severe MyGodWhatHaveIDone late in the series when Sento manages to restore her to her original personality.]]

* Burn Smash, this episode's MOTW, is [[spoiler: Ryuuga's girlfriend. Unlike other Smash, her body is so weak that defeating will outright kill her instead of separating the Smash essence from her body. Despite this, rather than harming Ryuuga, she turns her on flames on herself, until Sento [[MercyKill Mercy Kills]] her, allowing Ryuuga and Kasumi only a brief moment to reconnect before she dies.]]
-->[[spoiler:'''Kasumi:''' If you'd never met me, you'd have had a much happier life. I'm sorry.]]
-->[[spoiler:'''Ryuuga:''' Don't be stupid! As if there could be a life better than this! For me... meeting you... gave me the greatest happiness.]]

* [[spoiler: Nabeshima turns out to be alive after the events of #3, but being turned into Smash ''twice'' made him forget everything. He doesn't recognize Ryuuga and [[AdultFear what's worse]], he doesn't recognize his family either including his daughter.]]
** [[spoiler: His daughter promises to teach him how to do the cat's cradle and help him get his memory back ]]
** [[spoiler: Ryuuga sobs when he realizes that Nabeshima genuinely doesn't remember him as it ensures his life will remain in ruins.]]
* [[spoiler: Knowing that Nabeshima saw a similar panel in Faust's lab and that Pandora's Box is missing two of its side panels, Sento digs the bottle matcher out of the wall to make sure. His suspicion proves to be right and he confronts Souichi, heartbroken that his adoptive family lied to him.]]

* [[spoiler: Kuwata killing himself in front of Sento is sick and horrifying, but not exactly sad. The sad part comes in when you realize that Sento will probably blame himself for his death.]]

* [[spoiler: Kasumi wrote Ryuuga a [[DeadManWriting letter]], starting with saying that she will probably be dead by the time he gets to read it and that he should [[IWantMyBelovedToBeHappy get over her]].]]

* [[spoiler: Sawa's father was murdered by Touto Government to cover the loss of Pandora Box' panels. Considering that they were stolen by Faust and Gentoku is Night Rogue, you can connect the dots who gave the order.]]
* [[spoiler: Utsumi's death is damn sad despite [[DisneyDeath him not actually dying]]. He seems to have remorse over his actions for Faust and tries to [[JacobMarleyWarning warn]] Sento, but [[HeelFaceDoorSlam is shot]] before he says much.]]

* Seeing everything crash around Sento. [[spoiler: Soichi]] is Blood Stalk, who framed Ryuuga and manipulated pretty much everything and everyone into his plans. The realization only really starts setting in in #14, but he is still very distraught just by the possibility and it only becomes worse upon confirming it.
** The episode spent so much time focusing on [[spoiler:Soichi's desire to keep nascita open so Sento would have a place to come home to after his battles were over.]] Near the end of the episode when [[spoiler:Sento and Ryuga return with Pandora's Box and nobody is there, Sento's saying "I'm back" to the empty room is sad enough, but becomes even worse just minutes later when you realize it's confirmed his suspicion that Soichi is Stalk, and leaves you wondering if all those warm words earlier were just another lie.]]

* The preview alone starts with a low blow, with [[spoiler:Souichi]] saying that Sento “was just playing the role of a hero”.
* There’s something tragic about the TV debut of [=RabbitTank=] Sparkling and the fact it’s first opponent will be [[spoiler:Souichi]].
* Sento's having flashback [[spoiler: about his time with Souichi]] during his fight with the Blood Stalk. It hurts so much he slowly stops fighting or even defending himself.
* [[spoiler: Sento cries as the realization sets in. All he remembers in his life was manipulated or an outright lie.]]
* [[spoiler: Imagine what Misora would feel when she finds out truth. Her father was basically using her the whole time, a member of Faust and had caused the death of many innocent people. She would not be happy for sure. Sento and Ryuuga had decided not to confront her about the full truth about what happened with Souichi but it is doubtful that they will be able to conceal the truth forever.]]
** [[spoiler: The pictures on Toei's site imply that this is going to happen just about next week.]]

* Misora finds out that [[spoiler: her father is evil. She puts on a cheerful facade to delude him into thinking she did not. She breaks down a moment after he leaves.]]
** What makes it worse is [[spoiler: Souichi tries to throw her off the trail with a joke about growing coffee beans. The flashbacks to he and Misora laughing together while working at nascita imply that he might [[BecomingTheMask have genuinely started to care for her.]]]]

* [[spoiler: Preview of #16 shows Ryuga and Sento fighting because of the revelaton of #15. It seems that after finding out that Takumi Ktasuragi is not dead, Ryuga wants to make sure it will not stick. Or, according to the dialogue, that Sento has undergone a HeroicBSOD and Ryuga might be trying to snap him out of it.]]

* Sento is in turmoil over [[spoiler: the revelation that the whole mess is his invention]] and he just wages on to complete the Sclash driver, pretty much dead on his feet any otherwise. Ryuga decides to beat out his frustration by challenging him to fight and is granted his wish even though Sento has little will to fight. And that is all when Sento is horrified of [[spoiler: having hurt people before and not being able to remember all the things he should be sorry for.]]
* Ryuga is angry at Sento for [[spoiler: creating the inventions that killed Kasumi]], but he is also angry at himself for not being able to stop being angry at Sento. He knows that Sento feels terrible and it's pointless blaming him for anything for as long as he has only vague knowledge what he should be sorry for, but being [[EmotionalBruiser himself]] he just can't keep his emotions down.

* Sawa brings in information on Kazumi and Three Crows, revealing [[spoiler: that he supported their families when the agriculture in Hokuto went down the tubes and when they didn't have anything to eat anymore, he signed up for military to be made into a weapon so the government would take care of them. They followed him and still remain loyal to him because of this.]]

* Kazumi rushes onto the scene, [[spoiler: sees that Sento is going for the kill and transforms into Grease to stop him. He's too late.]]
* Ryuga [[spoiler: trying to stop a Hazard Trigger-affected Sento from continuing to attack the rest of the Hokuto Three Crows after Aoba goes down, knowing that Sento actually doesn't want to hurt or kill people, only to be harshly backhanded out of the way.]]
** [[spoiler: Forced out his transformation, Sento is confused for a moment before looking at Kazumi holding a dying Aoba in his Smash form. He starts to realize what happened and looks at Ryuga with the most anguished expression he's ever had as if looking for confirmation that what he's suspecting is wrong. When Ryuga doesn't say anything, Sento looks back at Kazumi and asks the question. ]]
--> [[spoiler: '''Sento''': ''(barely holding back tears)'' [[MyGodWhatHaveIDone Did I do it?]]]]
** [[spoiler: Akaba and Kiba charge at Sento in [[RoaringRampageOfRevenge blind fury]] to kill him barehanded and Kazumi stops them, because even thought he is hurt as they are, he doesn't want them to take their anger out on Sento when he is down.]]
* Sento being rendered a depressed nigh EmptyShell by the trauma of [[spoiler: losing control and killing another human being]].

* [[spoiler:When Sento goes to Aoba's grave to pay respects, he has a full blown panic attack complete with a hallucination of Aoba and even begs Kazumi to hit him as retribution for killing his ally.]]
** Kazumi's reaction is even more of a tearjerker. [[spoiler: He doesn't blame Sento for Aoba's death at all, instead telling him that Aoba knew what the stakes were and that [[WarIsHell the idea that preventing anyone from dying was impossible from the start.]]]]
* [[spoiler:Ryuga's reaction to Aoba's death. He blames himself for causing it as he was the one who went to take on Hokuto and forced Sento to use the Hazard Trigger to save him. The memory of Sento's terrified face after his transformation dropped caused him to lose all motivation to fight the remaining Crows and Grease. Made worse when he tries apologize to them for Aoba's death and gets brutally kicked by Kazumi for doing so.]]
** Kazumi's reasoning makes it worse, [[spoiler: He believes that if Ryuga isn't ready to kill then he shouldn't be on the battlefield. Everything about his interactions with the main heroes is tailor made to highlight that WarIsHell.]]
* Soichi tortures Sento by casually talking about all his worries and thoughts that hurt him. He makes it so Sento feels every word, [[spoiler: causing him to snap and charge at Soichi in blind fury just to shut him up.]]
* The Next Episode preview raises some worrying possibilities. For one, Sento seems to have been forced into using the Hazard Trigger again. For another [[spoiler: the episode itself is called "Tearful Victory" and we're treated to Misora practically ''screeching'' the following line in what seems to be horror with the visual of [=HawkGatling=] Hazard [[NothingIsScarier standing stock still.]]]]

* Sento tells Misora that using the Anti-Hazard Trigger device is not [[spoiler: murder. He is just a weapon.]] Misora proceeds to rip Sento a new one for saying that, [[spoiler: yelling at him that he is human, a stupid human who always puts people's happiness before his own well-being. Sento's heartbroken expression reveals his earlier calm proclamation as lie that he's trying to convince himself to believe just to be able to keep on going.]]

* Misora sobbing her heart out in Sawa's embrace in the end of the representative match and after it. The feelings seem to be mutual among all participants, it just depends on how good they are at holding them back. [[spoiler: And then just when things finally seem like [[HopeSpot they'll calm down]] ''Seito declares war on Touto''.]]

* The preview features [[spoiler: Kazumi clutching bleeding Kiba in his arms before the next cut shows him attacking Engine Bros and howling in pain in a gravel field. Seems like Grease might lose another comrade.]]

* [[spoiler: Kiba is taken hostage by the Washio Brothers and Mido asks Kazumi to become a weapon in service of Seito or Kiba and the workers on his farm die.]]
** [[spoiler: As predicted from the preview, Kiba dies in this episode, taking a blast intended for Kazumi.]]
*** [[spoiler: Even worse, Kiba hints that the beating he got from the Kaisers did a number on him and probably would have died either way.]]

* Akaba and Kazumi agree to burying Aoba and Kiba's dogtags on the Sky Road since that's all they have left. What's worse, [[spoiler: Poor Masaru doesn't even get there as he dies shortly after.]]
* [[spoiler: As if Kazumi's sorrow in losing more men is not enough now he's lost ''Masaru''. One wonders if he'll truly recover after the war ends or even ''survive the whole ordeal'' given the hell he's endured.]]
--->'''Kazumi:''' Why the hell didn't you run dumbass...?! I guess that's you to the letter. Dumbest guy I knew. [[TrueCompanions But you cared about your friends more than anyone]]. And in the end you lost because of it...! But y'know, [[spoiler: Masaru]]...[[SoProudOfYou That's exactly why I was proud of you the most]].

* Kazumi makes a grave for all his lost friends like he agreed with Akaba. [[spoiler: It's just a shame he has to add [[DueToTheDead Masaru's dogtags along with Syuuya and Syoukichi's]]]]
* In the end, everything heartwarming about [[spoiler: Sawa's relationship with the main cast was for nothing since it turns out she's a [[{{Brainwashed}} Nanba Child]]. Everything, from the very beginning to her seeming HeelFaceTurn was ''fake''.]]
** [[spoiler: She is essentially ChildSoldier version of Soichi. She pretended to be an ally, wasn't around for extended periods of time, was outed once before the full reveal and so on...]]

* During Sawa [[spoiler: confessing to Sento that she's a Nanba Child, she also explains that during her time with the heroes she felt actual familial warmth for the first time. This lead to a conflict of interest with her orders from Nanba to ''kill herself before she could be captured'' and caused her to realize two things. One: Nanba doesn't give a damn about her no matter how loyal she is, and Two: [[BecomingTheMask she's become the mask.]] All of this makes it even more heartwarming when Sento still accepts and cares about her.]]

* Seito, now under [[spoiler: Nanba's control]], declares further war effors against Touto and even puts the blames on Touto for this.
** This means Kazumi still can't go home. He is justifiedly heartbroken, because he fights with all his strength all the time and it's still not enough.

* As Ryuga tears into Sento for letting Kazumi leave to go back to Hokuto, Misora sadly points out that neither she nor Sento has any right to stop him because [[ItsAllMyFault the war is their fault]] (Sento for [[spoiler: creating Faust]] and Misora for purifying the [=FullBottles=]).

* TheReveal that [[spoiler: Souichi has been [[DemonicPossession possessed]] the whole time, with the dialogue indicating he's been '''[[AndIMustScream aware]]''' but unable to control his own body--meaning that he's had to watch as the thing possessing him not only commits atrocities against others, but also psychologically traumatises and deceives his own '''daughter''']].
** That's not even getting into [[spoiler: how hard Souichi must have been mentally screaming in terror as whatever is possessing him tried to ''murder'' Misora at the start of the episode.]]

* Ryuga's anger and increased Hazard Level waver when Gentoku hits him with a cruel reveal. [[spoiler: Stalk ''knew'' Kasumi didn't have a high enough Hazard Level to survive exposure to Nebula Gas and did so anyway so her death would ''cause Ryuga's Hazard Level to grow higher due to anger.'' Whatever Stalk's, or rather ''Evolt's'' plan is required Ryuga suffering the death of the woman he loved.]]

* [[spoiler: This episode gives us a HarsherInHindsight look to Gentoku's actions since becoming Rogue. Stalk explained that Gentoku hasn't been influenced by the Pandora's box ''AT ALL'' since he became a Rider, and he's been playing the bad guy to unite the nation and give it to his dad, because he thinks that Taizan is the only one capable of leading the nation properly. It also means that now, free from the Box's influence, he can look back on [[MyGodWhatHaveIDone the horrible actions he committed with Faust and he can truly feel guilt about them]].]]
* [[spoiler: Out of options and desperate, Gentoku pleads Sento to help him. Crosses into heartwarming since he needed help to save his father.]]
* [[spoiler: Misora got hit real hard this episode. She found out that her own father hasn't been in control of himself for ''ten years'' and she was talking to a ''genocidal alien maniac'' [[DemonicPossession wearing his face]]. Then when Rogue knocks Stalk out of his transformation, Misora can only see her father in pain, and tries to help him, only for [[SmugSnake Utsumi]] to take advantage and give Evolt the tool he needed, and ''[[TraumaCongaLine then]]'' she had to watch her father's hands be used to ''murder'' Taizan in front of her eyes.]]
* [[spoiler: Taizan Himuro [[HeroicSacrifice sacrifices]] himself to protect Gentoku from Evol. To say that Gentoku is heartbroken would be major understatement. He is dazed from shock at first, but then he dives in to [[DiedInYourArmsTonight hold him close]]. He realized that his father really loves him just a little too late.]]
** What's worse is [[spoiler: Gentoku's actions when Taizan falls out of his arms. He's not moving. He's frozen completely still. For a good seven seconds an expression of horror and shock is frozen on his face, and then his mind catches up to what's happening and all he can do is [[PleaseDontLeaveMe futilely plead with his dying father to stay with him]] while [[DiedInYourArmsTonight cradling him in his arms.]]]]

* The title couldn't be more fitting as the "Best Match" in question is of the one established back in the beginning. [[spoiler:Sento and Ryuga. After his final clash with Evolt, Ryuga winds up getting possessed by the genocidal alien after one ''hell'' of a HopeSpot. The way Kazumi starts shaking his head like he doesn't want to believe what he's seeing is true when Ryuga starts talking with Evolt's voice is ''heartbreaking''.]]
** What's worse, [[spoiler: we don't see Souichi after the final clash, leaving his fate ambiguous. Is he finally free of Evolt after a decade of horrifying servitude, or did Souichi actually ''die'' in that clash? Thankfully the next episode reveals that he's alive but catatonic.]]
** And it's all punctuated by [[spoiler: Evolt transforming into Dragon Form, reducing the proud and Badass Cross-Z to nothing more than a ''form change for himself.'' That evil laugh the Evol Driver makes at the end feels like Evolt laughing cruelly at the heroes as they watch their friend become their greatest enemy.]]
* Misora [[spoiler: grabbing Evolt and angrily/sobbingly screaming for it to give her her father back]].

* Evolt spends all of Sento's desperate and [[HopelessBossFight hopeless]] attempt to defend the Pandora's Box explaining everything about how Ryuga and he are [[spoiler: two halves of the same whole]], thoroughly pummeling Sento in the process. Once Sento's beaten and can't even stand anymore however, Evolt decides to [[KickThemWhileTheyAreDown torment Sento more]] by explaining about how he [[spoiler: threatened Shinobu Katsuragi, Sento's dad, into repairing the Evol Driver and how [[MyGodWhatHaveIDone the guilt he felt for aiding the genocidal alien]] was very likely the real reason Shinobu was DrivenToSuicide. Evolt explains this so casually and flippantly, there's no way he wasn't explaining it for the sole purpose of hurting Sento.]]
** And then, during his fight with Sento later, [[spoiler: he imitates Ryuga's voice in order to fake a FightingFromTheInside moment to get Sento's guard down only to shout "Gotcha!" and cruelly attack him to retrieve the remaining Fullbottles and open the Pandora's Box.]]
** [[spoiler: Evolt copying Ryuga's voice is also a cruel HopeSpot for the viewer. Thought that maybe ThePowerOfFriendship would force Evolt out and allow the heroes to stop the Pandora Tower from forming because we've still got many episodes to go until the finale? ''Wrong.'']]

* [[spoiler: Kazumi defeats Gentoku in a fight and tells him to think about what he felt when his father died so he can relate to the deaths he had caused himself.]]
* Misora trying to yell some sense into Sento when he is about to leave for his final battle with Evolt, extending to when Sento plans to [[spoiler:use the Pandora panel to unleash a suicide attack against Evolt]]. She doesn't want to lose anyone else.
* [[spoiler: Ryuga's]] horrified reaction when he wakes up, only to find out that [[spoiler: Evolt has possessed Sento]].

* [[spoiler: Ryuga can't transform because Evolt has taken all of his essence when he left his body. He tries to fight and desperation has him tackle Evolt and take the Dragon [=EvolBottle=] from his belt. He then proceeds to try and punch Evolt out of Sento with predictable results.]]
** [[SarcasmMode It gets better]]. He manages to fix that, but then the combined attacks of Cross-Z Magma, Grease and Rogue [[spoiler:[[GoodJobBreakingItHero unlocks]] the Evol Trigger]]. This, in turn makes Evolt leave Sento, which is good only until he wakes up and [[spoiler:[[IdentityAmnesia proclaims]] himself to be Takumi Katsuragi. Ryuga's OhCrap is ''very'' justified.]]
* [[spoiler:Ryuga's attempt to convince Gentoku to help him fight against Evolt and rescue Sento. Gentoku tries to dissuade him from trying by reminding him that he's responsible for Kasumi's death but Ryuga breaks down and admits that he just doesn't want to lose the people he has left. Unfortunately Gentoku responds that he can't help because the Rider System responds to the user's emotions, which would make him less useful as he's still in the throes of a HeroicBSOD following his father's death.]]

* [[spoiler: The nascita gang coming to terms with the fact that Katsuragi took Sento's place. They have absolutely no idea what to do now besides to just keep on fighting.]]
** [[spoiler: There's also the implication that Katsuragi would be back permanently, meaning the Sento they all knew would gone forever.]]
* [[spoiler: Katsuragi talks about the original intention behind the Rider System - fighting Evolt. He is heartbroken upon finding out that Gentoku used it to start a war between the regions and tears him a new one for doing so. Still, he admits he played a part in it, too.]]

* [[spoiler:Rai's CruelAndUnusualDeath. Disintegrated by a black hole from Evol's attack opening up beneath him. His last actions are to hurl his Engine Gear to Fu and tell him that it was all up to him now before perishing into the void with extreme pain. What's worse is that when Fu transforms into Hell Bros he forgoes his Nebula Steam Gun, and therefore the bulk of his most powerful attacks, out of absolute rage. The melancholy track that plays during this clues the viewer in to the fact that Fu's not going to make it either.]]
* [[spoiler:Fu taking the blow of a Black Hole Finish from Evol in order to protect Ryuga. The blow is fatal and Fu dies in Ryuga's arms.]]
** What's worse is Ryuga's reaction to [[spoiler: him dying. He desperately tries to grasp at the fading motes left behind before punching the ground in anger.]]
** From a meta perspective, [[spoiler:the death of the characters]] becomes worse with the knowledge of their suit actor passing away [[spoiler:as well]].
* [[spoiler: Katsuragi justifying Misora's time in Faust as being 'in the name of scientific progress' and his visible and audible pain at the death of the Washio brothers shows that he's more affected by his own actions than he shows. It makes sense when you consider Sento using DissonantSerenity as a coping mechanism.]]
* [[spoiler: Katsuragi sounds so ''small'' when he's lamenting that another life has been lost, crying at the deaths of Rai and Fu. Coupled with the revelations that he constructed the Rider System to defeat Evolt and fulfill his father's last wish, it seems like people dying as a result of that goal is something of a TraumaButton for him. One has to wonder if he had a similar reaction every time a Smash subject died.]]

* [[spoiler: Katsuragi Takumi remembers being Sento and, realizing just how his quest to destroy Evolt negatively impacted his own personality, relents his place as the main personality of their body to him. The next episode lessens the impact somewhat by revealing that Sento can still contact Takumi.]]

* Kazumi runs off on his own and infiltrates Faust in Hokuto, [[spoiler: which leads to him being experimented on. Now his Hazard Level is high enough to use Dragon Jelly, but also to disappear when he is defeated. It's also implied that if Kazumi loses himself to the effects of Nebula Gas, he counts on Sento stopping him with any means.]]

* The reason for the Best Matches is revealed. [[spoiler: When Evolt possessed Soichi, he probed his memories for thirty things that he liked. Soichi replied with thirty things that he remembered that Misora liked and those became the Organic Fullbottles. Then, Evolt probed for things that could ''destroy'' those things. At first he got straight answers such as tanks and gatling guns, but then Soichi started giving nonsensical answers such as erasers and comics because he wanted to protect the things that his daughter loved. This serves as a cruel reminder that Soichi was just a normal man who was exploited by an evil being who wanted to destroy everything he cared about.]]

* Evolt declares himself the country's leader and is accepted by happy crowds. This makes Gentoku question if he can fulfill his father's wish and Utsumi takes the oppurtunity to demoralize him as much as possible. [[spoiler: This nearly ends with Gentoku dead as he can't fight unless he gathers all the shaky faith he has.]]
* [[spoiler: Sento tells Katsuragi that their father created the Rider System for good ends. Katsuragi is too jaded to believe him.]]
** [[spoiler: Sento's absolutely heartbroken face when he sees his dad helping Mad Rogue just multiplies the first point.]]

* Sento has HeroicBSOD through most of #43 because of [[spoiler: seeing his father again and as a villain]].

* Kazumi rips into Sento for [[spoiler: defending Shinobu Katsuragi]]. Sento keeps on looking away from him and when shaken, idly mutters a defense.
--> ''' ''' [[spoiler: Dad is not our enemy.]]
** He keeps a blank face through the whole scene, but the way he bites nails and messes with hair after Kazumi leaves shows the anxiety simmering inside.
** [[spoiler: Kazumi is mad at Sento, but also wants him to acknowledge the truth because that might hurt less than holding on a false truth. Seeing no response, he claims not to trust Sento anymore and goes off on his own. Gentoku tells Sento that he is too wrapped up in believing his father and follows Kazumi. Blindly following his ideas was pretty much Gentoku's FatalFlaw as Night Rogue and helped Evolt steer him right where he needed him.]]

* Perhaps this episodes crowning moment of TearJerker, Sento's father pulled a ''XanatosGambit'' on him. He showed the weakness of the Triggers, both Hazard and Evol, so the Kamen Riders would defeat Evolt and purify the Lost Bottles. But if Evolt won, then they would still get the test subjects needed for the remaining Lost Smash. Either way, Evolt ''won''. [[spoiler: Thankfully, the next episode confirmed that Shinobu had pulled a fast one on Evolt and was only thwarted by Evolt [[OutGambitted having contingencies in place.]]]]

* [[spoiler: Shinobu manages to pass some crucial information to Sento before he dies. His final act is to lovingly ruffle Sento's hair as he used to do with Takumi.]]
--> [[spoiler: '''Shinobu''': Takumi, you've gotten taller again.]]
--> [[spoiler: '''Sento''': ''(in shock, grasping at the air his father have dissolved into)'' No, I haven't.]]

* [[spoiler: Katsuragi refuses to acknowledge that there may have been still something good to his father, because his trust has been hurt so many times he doesn't want to care anymore. He refuses to face Sento through the whole exchange, implying that despite his words he does mourn him after all]].

* Sento gives Kazumi the Blizzard Knuckle and warns him to only use it as a weapon because if he uses it to transform, he will die. Kazumi says it doesn't matter, only for Sento to assure him that everyone would miss him. [[spoiler: Everyone looks devasted in #47's preview. Go figure.]]
* [[spoiler: Evolt split off a part of himself to create fake Hokuto Trio specifically to stab Kazumi in the back and twist the knife full cirle. Kazumi fights them, but can't hurt them. Beaten down, he recounts how their deaths permanently damaged him and apologizes for breaking his promise to Sento. He is not coming back from this battle.]]
* A moment from the end of the episode [[spoiler: as Kazumi transforms using the Blizzard Knuckle knowing full-well that it could and probably ''will'' [[DeathSeeker kill him.]]]]

-->'''[[spoiler: Kazumi]]:''' [[NotAfraidToDie Damn right I am.]]

* [[spoiler: Misora tells Kazumi why she never called him by his name. She was afraid doing so would wind up causing him to hit a Death Flag and was afraid she'd lose him. Unfortunately, she's admitting this ''as Kazumi is dying.'' The last thing he sees is her hugging him close and begging him to not die. He's crying during the exchange too and tells her he regrets knowing that he's leaving the nascita crew behind.]]
** [[spoiler: Misora finally calls him "Kazumin"... After he's died.]]
* [[spoiler: Utsumi puts his all into fighting Evolt, is fatally wounded by overusing the Evol Driver and then killed by Evolt when he shields Gentoku and Sawa with his body.]]

* [[spoiler: The gang has made it to the tower's top and started recovering before the final round, looking like a battered and bruised pile of human misery.]]
** [[spoiler: Misora reunites with them and you can't hear her telling the rest that Kazumi's died due to the audio for the scene cutting out for drama. This doesn't make seeing their reactions any easier. Sento just stands there in horror, Ryuga punches a wall in futile anger. Sawa hugs Misora, her hands still bloody from when she was tending to Gentoku's wounds, and Gentoku, who'd formed a sort of friendly rivalry with Kazumi, screams in anger and sorrow.]]

* If Kazumi's death wasn't enough, the previews show that [[spoiler: Gentoku is the next one on the chopping block. He ends up dying, attempting to immobilize Evolt by damaging his Evol Trigger. It ends up successful after his death.]]
* In the last minutes of the episode, [[spoiler: Ryuga knocks aside Sento and forces him out of his transformation as Sento was going to sacrifice himself to destroy Evolt, only to do it ''himself'' and tell his friend "Thanks" before flying himself and Evolt into the distortion to complete the fusion of the two Earths.]]
** [[spoiler:His reason? He's got Evolt's DNA in him, and if Evolt's going to go, he has to as well.]]
-->'''Ryuga:''' [[spoiler: I got Evolt's DNA in me. It makes sense for me to go down with him.]]

* [[spoiler: "My friends built Kiryu Sento... They created Kamen Rider Build!"]]
* [[spoiler: Takumi Katsuragi dies for real this time, acknowledging that Sento was correct.]]
* [[spoiler: Sento's plan succeeds, but there's no a place for him in the new world. Because "Sento Kiryu" was created by the old world, nobody remembers him (Misora has a brief moment of "Have we met before?" but that's it) and there isn't a place for him, either as Takumi Katsuragi or Taro Sato (he exists as his own person, and Soichi mistakes him for Sato). He's essentially become a nomad, though this is mitigated when he finds out that Banjou is there too.]]
** [[spoiler: However, it's actually worse for Banjou: There's already a Ryuga Banjou in this world, one who's a successful MMA fighter and whose girlfriend Kasumi is alive and well. And original!Banjou is fully aware of this, meaning he gets to see what his life could have been but will never be.]]

* Ankh's return was something any ''OOO'' fan would be crying tears of joy over. [[spoiler:Sadly, he only lasts to the end of the movie before his conscious Core Medal breaks again. He was just enjoying an ice pop in front of Eiji as he faded away and the Medal, now split in two again, fell to the ground. Mitigated somewhat by the fact that [[Film/KamenRiderXKamenRiderFourzeAndOOOMovieWarMegamax Movie War Mega Max]] confirms that Eiji manages to fully revive Ankh in the future and that this is most likely the first step.]]

* [[spoiler: Thanks to the Blood Tribe's brainwashing, all of Japan hates Sento. Literally all of Japan. Even Misora and Sawa.]]
* [[spoiler:Ryuga betrays Sento to the villain of the movie thanks to being brainwashed.]]

* Misora witnessing Kazumi use the Grease Blizzard once again brings a moment of despair, because she remembered what killed the other Grease. [[spoiler:Since he survives this time, however, she feels much more hopeful.]]
* Kazumi grieving the death of his comrades, the Hokuto Trio, after their powers were used in making the Grease Perfect Kingdom. [[spoiler:However after the battle is over it turns out they survived the process, and that faking their deaths was essential for making Kazumi's hazard level reach the point necessary for him to make full use of his new powers.]]