Yes, the text blurbs at the end of every jingle might be a bit Narmy, but between them and the initial activation sound, which is revealed to be that keys unique ability, you realize that each Progrise Key tells you A) What its useful for, and B) How best to do so.
Assault Wolf when used in tandem with the Assault Grip. The text-to-speech makes it clear its a Deadly Upgrade for any human who uses it, considering it was designed to be used by HumaGears. It also doubles as Exact Words when you think about it. No chance of surviving, referring to both the unlucky sod who is fighting the person using Assault Wolf, and the user themselves who are literally willing to risk their lives to bring the enemy down. As Isamus section of the A.I.M.S. Character Page points out, its like making a Deal with the Devil.
On the other hand, Shining Assault Hopper elicits a different reaction. With Assault Wolf, it seemed like the Ark was giving Isamu its power, but with the explicit statement in the text-to-speech portion stating that hes just as likely to die from using it as are his opponents. With Aruto, on the other hand, both Zea and the Ark work together to help create the armor that will be the Shining Assault Hopper form. In the second text-to-speech portion of the transformation, the driver says No chance of surviving this shot. It could be because Aruto is the grandson of the man who made the Ark, but its far more willing to help Aruto to the point it works together with Zea to help him than it does with Isamu.
Even Metal Cluster follows suit, albeit more subtly. Its ability Everybody Jump references it's powers as a Pest Controller, given that the armor of the suit is made of Cluster Cells (Something also referred to via the standby jingle "Let's Rise"). Meanwhile the actual lines "Secret material, Hiden Metal", and "It's High Quality!" both detail the sheer durability and strength of the form given that it's made entirely of the metal, though given how unpredictable it can be (and given that the Ark has a way in if Aruto has hate in his heart), the form isn't a normal one Zero One would have access to.
Everybody Jump takes on a new meaning after all the humagears send Aruto their love and positive emotions. They're all jumping with him.
The fact that it sounds like an ad makes sense as it was made by Gai.
Jin's new Key follows suit as well. It's ability, Inferno Wing highlights that while it also grants flight likes it's sibling, it also coats every attack and action with intense flames. So intense in fact that the text line straight up informs you what you're in for with The strongest wing bearing the fires of hell.
So who does have Speed for its ability? None other than the Lord of Speed himself, Kamen Rider Kabuto.
A meta-example. The meaning behind the name Reiwa is Beautiful Harmony. The story of Zero-One is about humans coexisting with A.I., or in other words, living in harmony.
Most weapons in this series fold out of attaché cases. Fitting for a series featuring a company president Rider.
The Magia are all based on extinct animals, symbolizing their goal to render humans extinct.
So far up to Episode 8note (Episode 9 features a Giger instead, and notably, Episode 10 onwards appears to be devoted for plot instead of making a reference, however, the theming could still return in the future.), each of the Magia are tied in some way to the victim they were created on, or the episode they are in.
The Berotha Magia in the 1st episode is created from a comedian HumaGear. Berothas design is based on an extinct praying mantis species, specifically Kujiberotha teruyuki. A species named after a Japanese actor who is also known for his comedian roles, Kagawa Teruyuki.
The Kuehne Magia in the 2nd episode, who was created from a delivery man HumaGear, is based on an extinct flying reptile, the Kuehneosuchus. Being able to fly and stick on walls would be really useful for a delivery man.
The Ekal Magia, also in the 2nd episode, was created from a security guard HumaGear. Ekaltadeta is an extinct species of marsupial. Marsupials carry their children with them, guarding them from threats.
The Neohi Magia in the 3rd episode is based on Neohibolites, an extinct genus of squid, and was in an episode featuring a sushi chef HumaGear making squid sushi.
The Onycho Magia in the 4th episode is based on Onychonycteris, an extinct species of bats. Bats sounds similar to Bus when both are pronounced in Japanese. The HumaGear this Magia is created from is a bus driver.
Another Onycho Magia appeared in the 6th episode, this time created from a taxi driver. However, it only appears shortly before getting destroyed, as its only purpose was to steal and deliver a Progrise Key to Jin. It is likely that the production team for the series chose Onycho Magia due to Kamen Rider Jin debuting in the same episode and using the Flying Falcon Progrise Key, which also debuted in the 4th episode.
The Vicarya Magia in the 5th episode is based on Vicarya, an extinct genus of snails, thus it features drill-like shells. Which also happen to resemble the tip of a pen or a brush used for drawing and coloring manga, which is what the episodes plot is centered on.
The Gaeru Magia in the 6th episode is based on Rheobatrachus (also known in Japan as Ibukurokomorigaeru), an extinct genus of frog that is known to raise their young by carrying them inside their body to protect them. Frogs are also an animal known for their voice. These two facts match the theme of the episode, which is a protective parent raising a voice-acting HumaGear.
The Mammoth Magia and Dodo Magia in the 7th episode are tied to a more simple but also slightly more obscure theme within the episode: Hot and Cold. Mammoth is an animal that lived in cold places, while Dodo is an animal that lived in a hotter tropical island. The theme is reinforced by the two auxiliary Progrise Keys that Zero-One uses in this episode, Flaming Tiger and Freezing Bear, not only having hot and cold powers, but also using an animal commonly found in hotter tropical/savanna regions (tiger), and an animal that lives in the Arctic (polar bear). Also, Kobe, the HumaGear featured in the episode, is referred as hot-blooded, yet dresses fully in blue, a cold color.
The Dodo Magia returns in the 8th episode as the only Magia in the episode, however, it still ties into a theme of the episode, as the Dodo Magia is an assassin dressed in black, while Mashiro-chan, the HumaGear featured in the episode, is referred to as an angel dressed in white.
The Hiden Zero-One Driver containing a built-in tutorial serves to not only explain its functions to the user but possibly guide them through the battle.
Each Transformation Trinket has a different type of announcement for Progrise Keys, showing how the users of each device relate to Hiden Intelligence.
The Hiden Zero-One Driver announces a jingle, the name of the Progrise Key, and the text-to-speech, showing how Hiden Intelligence created the technology and Zero-One is the intended user of it, as well as how he embodies the entire spirit of the tech being used as a force for good and a positive image (hence the light-hearted jingles), but also as a tool to fight the Magia (the text-to-speech).
The A.I.M.S. ShotRiser announces the name of the Progrise Key and the text-to-speech, showing that while they also fight the Magia, they dont have a positive relation with Hiden Intelligence, and only see the Progrise Keys as a soldiers tool to destroy the machines, hence it only uses the name announcement and the mechanical text-to-speech portions.
The MetsubōJinrai ForceRiser only announces the Keys name and Break Down, showing that theyre directly opposed to Hiden Intelligence and only care for the Keys as much as they can cause destruction.
The ZetsumeRiser only announces ZetsumeRise, because the Magia are just interchangeable monsters that want to make all humanity go extinct.
The ZAIA ThousanDriver plays the full jingle of Amazing Caucasus, which has no text-to-speech, because Thouser acts heroically but is a competitor of Zero-One and Hiden Intelligence.
The CycloneRiser announces the Keys name and Type-1, showing it is a prototype belonging to an apparent enemy of humans.
The RaidRiser has the same announcement style as the A.I.M.S. ShotRiser, because its used by enemies of HumaGears.
Isamus arm being in a sling in the end of episode 2 makes sense, and not just with him forcing the Progrise Key to open up. In the first episode, the A.I.M.S. ShotRisers recoil can be seenknocking him back a bit. It likely means hes using a higher caliber weapon than hes used to and probably had minimal training, thus probably not handling it completely right. And not only did he use it one handed after stressing his arms out to open the Shooting Wolf key, but he fought an extended length with it, even using a Shooting Blast. Its little wonder why his arm needs time to heal after all of that.
Isamus main form is Werewolf, while Yua is Cheetah. Their contrasting personalities are basically Dog vs. Cat.
The MetsubōJinrai ForceRiser requires the Progrise Key/Zetsumerise Key to be inserted while closed, with it being forced open by the drivers activation. Its aptly named.
Isamus problems with opening his Progrise Keys may actually be explained by how the Progrise Keys are supposed to be used - both the Hiden Zero-One Driver and the A.I.M.S. ShotRiser have an additional step (holding the Progrise Key over the Authorizer, and pushing it into the Rise Slot before unfolding) that makes the Driver announce Authorize before the more elaborate sounds. Something that Isamus been skipping over all this time.
One of the most common tropes in Kamen Rider series is the evil brother/father figure. Horobi technically fills the role as he considers Jin his son.
Why Aruto cracks more bad puns while transformed than not transformed is explained in episode 1, where we see that the Hiden Zero-One Driver gives the wearer the same mental processing speed as an AI supercomputer. Of course Aruto would use it to come up with, and then make jokes.
Why are no specific reasons given for why HumaGears based on real people are illegal without obtaining permission? Because the most obvious one couldnt be said on a kids show.
Other possible reasons could include identity theft or fraud.
It may not be obvious at first glance but the reason the Mammoth Magia loses to Zero-Ones Freezing Bear form is because mammoths went extinct at the end of the Ice Age.
Just like the Hiden Zero-One Driver, the MetsubōJinrai ForceRiser summons a projection of the Progrise Keys Rider Model animals during transformation. What makes this brilliant is HOW the animals react to being forced to release their power, before they are shattered by the armor forming.
Flying Falcon envelopes Jin with its wings, which can be seen as either an attempt to calm down and comfort Jin (who turns out to be not as bad as Horobi), OR an attempt to prevent Jin from being able to harm anyone.
Sting Scorpion literally stings Horobi with its tail stinger, and then appears as if trying to attack him head-on.
Rising Hopper simply leaps out of the Progrise Key, because Zero Zero-One is a hero.
No Lost Model is projected from the Dodo Zetsumerise Key for Kamen Rider Ikazuchi, because dodos are extinct.
However, by episode 10, it seems they have successfully forced full control over the animals.
We finally know one reason why Horobi and Jin removed their HumaGear Modules aside from liberating themselves from human control - its also to prevent being detected. Their rider forms lack earpieces too.
As HumaGears are essentially humans in robotic bodies, when they are forcefully converted into Magia, they are basically stripped of their humanity to become monsters against their will.
While theyre not the only example, dodos are one of the most notable examples of an ancient species going extinct through excessive hunting by humans. Its rather appropriate that the Dodo Zetsumerise Key is used by Little Assassin, a character specifically tasked to hunt down the protagonist, a human. Dodos are also notably not very smart when faced against predators, so of course the Dodo Zetsumerise Keys main feature is combat learning.
Normal HumaGears have blue light in their HumaGear Modules and eyes, while hijacked ones/Magia are red. The exception is Ansatsu-chan because Yua changed his lights color.
Horobis color is purple, a mix between blue and red. He retained enough control of himself but definitely not a benevolent HumaGear.
Jins color is pink, a light shade of red, because hes under Horobis control but isnt completely evil.
Ikazuchis color is crimson, because he is completely under the control of MetsubōJinrai.net.
Though still an excuse to justify him getting into new adventures every episode, personally going out to deal with customers gives Aruto a chance to learn how the business works as well as help establish himself in the corporate world.
Regarding Shining Assault Hopper. Why doesnt it have a transformation jingle, form name, then text-to-speech and instead has two text-to-speech phrases with the form name in between? The first text-to-speech makes it clear that Shining Assault Hopper is a form that has never been done before. Keep in mind that the form is only made possible via the Assault Grip, which was created to be used in tandem with the Assault Wolf Progrise Key (which was created with data from Vulcan and Zero-Ones past battles) and made by the Ark, is being used together with Shining Hopper, which was made in similar circumstances as Assault Wolf but was created by Zea. The only reason Aruto got the idea to use the Assault Grip with Shining Hopper was because of the data Zea provided him about the Assault Grip in the first place.
The Dodo Zetsumerise Key is the first Zetsumerise Key shown to have its own standby Theme Tune when put in the ZetsumeRiser, further reinforcing that its unique in some way.
Some may wonder why Aruto, Isamu, or Yua dont attempt to stop Jin from corrupting HumaGears into the next Monster of the Week. Well, considering that Jin is a HumaGear himself as well as armed-and-dangerous, it would be too risky for the heroes outside of their suits to try and fight Jin.
Unlike Isamu who starts coughing blood and barely able to stand after using Assault Wolf, Aruto doesnt suffer a major backlash from using Shining Assault Hopper. Why? According to the wiki, Assault Wolf lacks the safeties and life support, which makes sense since Assault Wolf was designed specifically for the use of HumaGears. However, Shining Assault Hopper uses both the Assault Grip and Shining Hopper, one item made by the Ark and the other by Zea. The form is Ability Mixing at its finest, in that not only does the form combine both Shining Hoppers incredible speed and Assault Wolfs overwhelming brute force, it also matches the specific tasks Zea and the Ark have.
Zea creates the armors used by Zero-One, who fights to protect humans and actively works to help them co-exist with HumaGears. Naturally, Zea will do its best to help Aruto. The Ark, on the other hand, is trying to destroy humanity and focuses more on the destructive aspect like the Magia. In other words, Shining Assault Hopper has Zea keep Arutos body from reaching the breaking point like Assault Wolf does to Isamu, while the Ark helps Aruto by offering him a major boost in firepower.
Thouser goes all out with the king theme. Not only does he have Gold-Colored Superiority, but purple eyes, because Purple Is Powerful and associated with royalty. He was also seen in some promotional material with blue eyes, a nod to the color royal blue.
Ichigata being heroic is shown by the sounds of his Zetsumerise Key, which announces The Sole Hero of Ju-Ju-Ju-Justice and Kamen Rider will fight to protect humanity in the Hiden Zero-One Driver. The CycloneRiser, however, plays neither of them, allowing Ichigata to disguise his heroism.
The form with the jingle describing increasing the power of a Rider Kick is the first one to use a boosted finisher.
Why do the Raiders look more bulky and armored than the Magia? Because there's a human inside. Unlike Magias that are 100% robot from the inside out, Raiders have to account some additional space for a human to fit in. Not to mention, the fact that there's a human inside means that the armor has to be adequate to protect them.
Both Assault Wolf and Metal Cluster Hopper Progrise Key share similarities and some differences:
Both keys were created by the Ark and are programmed to bear hatred towards humanity, but are being used against the Ark's will. While Fuwa uses Assault Wolf to focused his hatred towards MetsubouJinrai.net by his own free will and thus cannot be manipulated by Ark, Zero-One is initially forced to use MetalCluster Hopper when overwhelmed by his hatred towards Thouser [read: humanity as a whole] and vulnerable to the Ark's manipulation.
Even their color scheme reflects some of this; despite sporting a darker shade of blue, Vulcan remained heroic, dedicated to eliminating MetsubouJinrai.net once and for all while Zero-One sports a grayish-silver color representing the mixed morality of Ark's desire to destroy humanity and Aruto's efforts to prevent that from happening.
The Progrise Hopper Blade was created using the positive emotions of HumaGears as a literal counter to the Ark's malevolence. It's no surprise that as a result it can literally negate the negative emotions that the Ark pours into the ZetsumeRisers and the Zetsumerise Keys and restore native HumaGear personalities and forms.
Episode 24 explains a lot about the series:
Where did Metsubojinrai got their Zetsumerise keys? Each Humagear has their own Progrise key that can store data. Metsubojinrai likely used discarded ones from the Humagears they stole and converted it.
Why do the Progrise keys have ability names on them? Each Humagear Progrise Key has their job name.
Why do Humagears have a particular tattoo on their body? It's for Progrise Key scanning.
How can the destroyed Humagears be remade with all the memories intact? With the data from their Progrise Keys.
In episode 25, there are differences of definition of Kamen Rider towards HumaGear and subtle implications of White, Gray and Black Conflict from them:
White: Aruto views Kamen Rider as a mean of creating a future where HumaGear and humanity can coexist together.
Fuwa is a full-blown Gray as he vehemently believed all HumaGear is evil after a Dark and Troubled Past occurred to him and views Kamen Rider as a mean to destroy all of them but started to have a different opinion of them after being saved by them and began acting accordingly without the reckless thinking of him.
Jin is from the villain side but he is AntiVillain that genuinely believe he will free all HumaGear from humanity and views Kamen Rider as a way to give them true freedom.
Gai's twisted view of Kamen Rider as a weapon to annihilate HumaGear by purposely instigating a war towards them in order to make profit for his own gain and to prove his ideology of Humanity Is Superior.
On the Subject of Colors:
Horobi and Gai represent opposite ends of the spectrum, Huma Gear and Human respectively. Their suits when transformed are Purple with Yellow/Gold eyes and Gold with with Purple eyes. This shows their allegiance in contrast to one another. Additionally Horobi's suit uses his color motif as the undersuit with silver-black armor while Gai's has a gold and black undersuit with silver armor.
Jin and Yua's starter forms both connected to their loyalty. Jin's suit is a magenta/pink a shade of purple, showing his loyalty to Horobi, while Yua's is orange a color very similar to gold which Gai has as his represented color. Jin's second form becomes red, representing his increasingly noble intentions and brings him closer to Aruto and Isamu to complete a trio with colors representing light, while Yua's forms get increasingly darker with the gold/yellow colors becoming less dominant in each form.
Isamu and Raiden have very similar personalities and all their forms so far as of writing this have kept their main color. Isamu retains blue in all his forms while Raiden is red, they are also on the opposite side of the show's alignment spectrum much like Gai and Horobi, human and humagear respectively. The difference lies in that Isamu started full or rather predominantly human but grew as a character, while Raiden was more in the middle of the spectrum before being revealed to be a Manchurian Agent.
Bingo Bengoshi seemed to be fine the next day after gaining his data back from being a Magia through the Zetsumeriser. There is no symbol or sign of him restarting his programming from scratch. This was most likely due to not being fully hacked by the Ark despite using a Zetsumeriser, so he managed to keep his original data safe. As of now, HumaGears do not need to fear of losing their entire data because Zero-One has the Progrise Hopper Blade to repair them from the Zetsumerisers and their Magia state.
Certain characters goal are actually aligned with characters from previous series:
Aruto's goal of wanting to create a future where human and HumaGear to coexist peacefully but facing obstacles when trying to achieve that goal much like of how Haruka wishing for the same thing to his fellow Amazons.
The revelation that Gai actually made the Raid Risers and their purpose of being used by civilians makes sense on many levels, being similar to civilian versions of law enforcement and military weapons, if the Shot/Slashrisers are akin to military grade weapons. This even comes down to their design of being stripped down Shotriser belts and sharing the same undersuits as the Shotrise ones. Even the choice of using common animal ProgRise keys shares this design method.
By observing Jin's characterization before and after his revival, it makes much more sense if you think about it. Jin's Psychopathic Manchild tendencies are influenced by his connection towards the Ark through the use of the ForceRiser, which forces him to serve Metsuboujinrai.net; after his revival, he acts more mature and independent, while getting his handa on the SlashRiser can be interpreted as him slashing/severing his ties from the Ark while maintaining his loyalty to Metsuboujinrai.net.
Aruto's decision of starting a new company, Hiden Manufacturing after his resignation as CEO of Hiden Intelligence is actually much more sense. By inheriting the title of CEO from his grandfather Kurenosuke, Aruto basically inheriting Kurenosuke's vision of wanting HumaGear and humanity to coexist together, a feat that Aruto never managed to fullfil after ZAIA's hostile takeover over Hiden Intelligence. By creating his own company while maintaining the same policy, Hiden Manufacturing basically served as a Spiritual Successor to Hiden Intelligence, continuing Kurenosuke's legacy.
The Legend Rider Progrisekeys all tie into some aspect of their users somehow.
Zero-Zero-One and OOO both have themes of reaching out towards something in their source media.
Metal Cluster Hopper and Gaim are both influenced (or will be influenced) by an inhuman force way over their heads.
Valkyrie and Drive both spin around for some of their finishers.
Horobi and Zi-O are both purple Riders whose origins are rooted in noble causes, only for something to try and twist those ideas.
Ikazuchi and Fourze are both associated with outer space.
Thouser, Build, and Decade have all had their users commit morally questionable acts in the name of the greater good (or at least what they believed was the greater good, in some cases.)
The technologies related to Zero-One being not patented to Hiden Intelligence makes sense. The transformation belts MetsubouJinrai Forceriser, A.I.M.S. Shotriser and the ZAIA Thousandriver have the group/company in their full nomenclature but the transformation belt for Zero-One is called the Hiden Zero-One Driver not the Hiden Intelligence Zero-One Driver meaning it is more aligned to the Hiden family not the company they are connected to.
The existence ofZea and Ark were actually symbolic foil to each other in many different ways:
Zea represent the Light, located far above the sky and much closer to the Sun, receiveing the light from itwhile Ark's name as if derived from Dark, located at the very bottom of the lake, utterly devoid from the light.
The Magia themselves are walking Fridge Horror. HumaGears are intended to be modeled on humans and are for the most part human-like. The first three episodes are bad enough, but when a HumaGear becomes a Magia from someone who is a authority figure for children such as school teachers, coaches like Kobe, a babysitter, or tour guides like Anna, not only would children be scarred physically if they survived, but mentally as well; the fact that the Magia suddenly betrayed their wards and attacked them would have unfortunate consequences. This might cause children to distrust both HumaGears and human adults alike.
Adding to this is the fact that the requirement to use a ZetsumeRiser is for a HumaGear to Grow Beyond Their Programming, e.g. start to develop a personality and thoughts of their own, or in other words, start having a soul, which is full of horrifying implications that just as they are starting to really feel, only for some lunatic to wipe it away. Its also implied that the Zetsumerise Keys hold of this data to be fed to the Ark. Somehow they made the robot version of Soul Eating.
Some HumaGears like Seine are modeled after real people and there is a law against making HumaGears to resemble people without their permission. Not only does it make it so they cant move on from their loved ones passing, it can also make them experience the pain of losing them again if an accident happened. Or worse, theyre turned into a Magia
Notably, despite this, Arutos father is explicitly shown to have a different style of HumaGear Modules, so hes likely to be a prototype made at the time before the law was fully implemented or given permission if it was after, unlike Seine. Furthermore, the original Seine died 3 years ago, and its implied that the HumaGear Seine was only ordered somewhat recently, so she couldnt have given any permission, resulting in Isamu insisting that Seine has to be taken away.
We find out in episode 6 that Jin is a HumaGear created by Horobi. And that much like any of the others, he can be reprogrammed, as when Jin begins to show signs of doubt, Horobi slaps the MetsubōJinrai ForceRiser on him, returning him to his typical self. Wheres the Fridge Horror in this? Well, how do we know this is the first time that Horobi has done this to Jin?
What A.I.M.S. is implied to do with illegal HumaGears they arrest is summarily destroy the HumaGears without prejudice.
To matters worse is that while HumaGear replacements can be made with their memories and personality intact, A.I.M.S. would not care, seeing them merely as rogue machines. So they not only get destroyed, but the A.I. inhabiting it also dies for real.
One HumaGear gets arrested by A.I.M.S. and merely analyzed, then released to do whatever it was supposed to, even though its purpose is to assassinate someone. However, the whole thing appears to be Yuas personal operation, which has its own Fridge Horror implications
In Episode 9, Jun Fukuzoe decides that the rampage at the hospital must be stopped as MetsubōJinrai.net hacks more HumaGears, and thus insists his President shut all the HumaGears in the hospital down at once. It doesnt last for long, but imagine how many people were left without care during the incident.
Arutos hesitance to attack or let anyone attack the Crushing Buffalo Raider in Episode 18 makes a horrifying amount of sense when one takes into account the fact that most all of the riders finishing moves tear HumaGears to pieces. Arutos panicked responses show that hes afraid of what they could do to a far less durable human.
With the revelation of the ShotRiser are required to have a special chip in order to operate said Riser, it's a beg of questions. When Fuwa was using the Assault Wolf Progrise Key for the first time, does that mean he has been hacked all the time and if that's true, what he has been doing during his unconscious time?
Also Gai's recall of HumaGears has some implications. Is Gai planning to reprogram all the recalled HumaGears instead of scrapping them, making them loyal to Gai himself? Perhaps make it easier for them to become Magia?
Gai has every Progrisekey save for Hopping Kangaroo, Assault Wolf, Metal Cluster Hopper, and Burning Falcon either in his possession or on file thanks to the Thousand Jacker, meaning he could theoretically have an army of Raiders with various powers and abilities.
Isamu forcing open his Progrise Key to transform implies two possibilities of how his equipment works:
He would have gotten the Key authorized to open anyway if he inserted it into the A.I.M.S. ShotRiser first (like how Yua does it), but he is too hot-blooded of an idiot to realize it.
Forcing it open forces the Key to shift into authorized mode and activates it for full use, much like how the MetsubōJinrai ForceRiser force-activates Progrise Keys. Also, now being able to easily force it open with one hand implies he broke the lock on it.