Spoilers for all preceding Kamen Rider entries and spin-offs up to Kamen Rider: Beyond Generations and Kamen Rider Revice: The Mystery will be left unmarked. You Have Been Warned!
After receiving several reports about attacks from an "Electro-Wave Human", Akiko Narumi assembles a team of female Kamen Riders including Poppy Pipopapo/Kamen Rider Poppy, Is/Kamen Rider Zero-Two, Reika Shindai/Kamen Rider Sabela and Sakura Igarashi/Kamen Rider Jeanne and Hana Natsuki/Kamen Rider Aguilera to investigate this new threat. At the same time, Hana receives a letter from a woman who claims to be her older sister, all while Black Satan, the evil organization fought by Shigeru Jou/Kamen Rider Stronger and Yuriko Misaki/Electro-Wave Human Tackle, has reemerged in the present day. What connection do these things all share and will the Kamen Riders be able to unravel the mystery?
Tropes:
- Actor Allusion: Sawa Takigawa is shown to be acquainted with both Kanon and Akiko. Her actress, Yukari Taki, played roles in both the series they're from, appearing in an episode of Ghost and the Double gaiden movie for Accel. Akiko even says she looks familiar and wonders if she should ask Ryu about it.
- Actually Pretty Funny: Is makes a typical Aruto-esque bad pun at the end. Most of the girls react predictably and ask Is who taught her such terrible humour so they can give him a piece of their minds, except for Kanon who actually finds it hilarious and starts cracking up.
- Big Little Sister: Sakura and Hana half squabble half tease about this at the end and which of the two should be considered the "Big" sister as Hana is a couple years older but Sakura is taller than her.
- Big Sister Worship:
- Sakura clearly admires Reika and even calls her her Cool Big Sis. Reika, a Big Brother Worshipper, says she likes the sound of that.
- Hana almost immediately becomes close with her older sister Yuriko.
- Borrowed Catchphrase: Is uses several of Aruto's throughout the special, including his signature "Only one that can stop you" battle line and his usual bad pun gag at the end.
- The Cameo: Since Hiroe Igeta was unavailable this is effectively what Valkyrie's appearance amounts to. She shows up, says her catchphrase gets blasted and then doesn't appear again for the rest of the special, even though Rinko, who was also in the prologue with her, at least returned at the very end.
- Continuity Nod: During the first meeting of the girls, Sakura references the events of Kamen Rider Revice: The Mystery, which saw Ikki and the gang meeting Ryu Terui (Akiko's husband). She and Reika also still remember each other from Beyond Generations.
- Demoted to Extra: Due to Yua Yaiba's actress, Hiroe Igeta, being unavailable at the time, she is not seen out of suit as Kamen Rider Valkyrie. On the inverse, Kanon is not shown transforming into Kamen Rider Kanon Specter despite doing so back during Kamen Rider Specter × Blades, due to the Kanon Specter suit having been retooled into the Aguilera suit.
- Girl's Night Out Episode: Brings together almost every female Kamen Rider from Ex-Aid to Revice, plus Akiko Narumi, Rinko Daimon, and Sawa Takigawa.
- "I Know You're in There Somewhere" Fight: Sakura has one with Hana after she's corrupted to become "Aguilera Dark".
- Innocently Insensitive: When Hana receives a letter from someone claiming to be her sister, Sakura encourages her to meet with them and says they might be her real family. In saying this however, Sakura inadvertently implied she doesn't view Hana as her "real" family, something which makes Hana get further jealous when Sakura calls Reika her "big sis".
- Late-Arrival Spoiler: Is's appearance as Kamen Rider Zero-Two is tied to an important plot point in Kamen Rider Zero-One: REAL×TIME. For that matter, so is the fact that Is is back to her old self after she ended the series a blank slate without memories, another plot point that happens in said film.
- Leader Wannabe: Akiko thinks she's the leader of the "Girls Remix" team, but she's the only one who really ever proclaims this.
- Massive Multiplayer Crossover: What else can you call a special that brings together characters from Double, Wizard, Ghost, Ex-Aid, Build, Zi-O, Zero-One, Saber and Revice to do battle against the Nebulous Evil Organisation from Kamen Rider Stronger.
- Mistaken for Dog: Or rather, "mistaken for a legendary creature". When Lovekov arrives at the scene to help the Girls Remix team, she stumbles at Akiko, Kanon, and Sawa. Akiko then takes her notebook and guess correctly that she is Sakura's inner demon, only for Akiko mistaken her for a tsuchinoko. Lovekov is less than amused with this.Lovekov: Tsuchi...!? Hey, I'm Lovekov!
- More than Mind Control: Part of how Black Satan hypnotizes Hana is by playing on her latent resentment towards Sakura.
- Mythology Gag: Hana's apparent older sister is named "Yuriko", the same as Yuriko Misaki/Electro-Wave Human Tackle, who was the template for all the later female Kamen Riders, and almost was the first outright, as Kamen Rider Tackle.note
- Photo Memento: The girls are invited to be in a photoshoot sponsored by Biblio Utopia Publishing, in part to celebrate the end of dismantling the Black Satan remnants for good.
- Real Life Writes the Plot: Aside from the otherwise mentioned scheduling conflict causing Valkyrie to only make a brief suit only appearance in episode 1, the reason Kanon does not transform with the other female Riders is because the Kanon Specter suit had been disassembled and used on parts for other suits.
- The Remnant: It appears Stronger and Tackle didn't fully finish off Black Satan, as they're back in action by the start of this series.
- Stay in the Kitchen: The in story reason Kanon doesn't become Kanon Spectre is that her brother said it was too dangerous to investigate the situation on her own and confiscated her Eyecon. She decided she didn't need it and went anyway.
- Surprisingly Realistic Outcome: Reika was able to suspect that Ms. Titan disguised herself as Akiko because the stain on her shirt was completely gone, when the real Akiko would still have had it no matter how much she'd try to clean herself up.
- The Cavalry Arrives Late: Rinko pops up at the very end after missing out on nearly the whole adventure to arrest Ms. Satan after she's already been defeated. Rinko even says she feels like she really shouldn't be included in the article since she didn't really help but the girls invite her to be a part of it regardless. Granted she isn't a Rider, so her help in the final battle would have been minimal anyway, but she is the only one of the non Rider heroines to actually carry a gun.
- Took a Level in Badass:
- Is and Poppy already did so in their series by becoming Riders, but now they're even tough out of suit with Poppy easily able to punch out grown men in a single hit and is able to invade Black Satan's security system via transmitting herself into it while Is uses her inhuman speed to disorient an entire squad of security guards into knocking themselves out without her even touching them. And while not quite as fancy Akiko, Kanon and Sawa are also able to fight off the security guards with hand to hand skills despite not having Rider powers albeit not quite as easily as the two non-human members.
- Sawa is also shown to have gotten tougher here. In Build she was able to fight off some Touto's agents, but here she's able to fight off Black Satan grunts all on her own.
- Took a Level in Kindness: Reika's significantly more pleasant and friendly to the girls here then she usually was in Saber, admiring their Henshin poses, asking Is to teach her cleaning skills and even seems more bemused than anything about Poppy and Akiko's quirkiness. The only time the usual Reika comes out is when she snaps at Sakura and Hana for continuing their spat in the middle of combat.
- Unwitting Instigator of Doom: Sakura unintentionally implying she doesn't view Hana as her family and her later swooning over Reika as her "big sis" is what leads to Hana becoming jealous and aloof towards the rest of the team, and allows for Black Satan to corrupt her.
- Wham Line: During the trailer for the second episode, in the final minutes, a surprising reveal is done.note Tsukuyomi: Sorry, I'm late...
- The Worf Effect: Valkyrie's only appearance in the special is her attacking the Electro-Wave Human and getting fought off and tossed away. Seems even in an all-girls special, she still has no luck. note
