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Shouichi Tsugami/Kamen Rider AgitoA man who wakes up on a shore, having lost all his memory. Living in a village nearby, he doesn't really care about finding his past until a monster called an Unknown attacks, causing him to transform into Agito. He decides to use his power to protect his new life.
Tropes that apply to him in general
- Accidental Misnaming: He often forgets people's names, particularly Hikawa's, and refers to them as Kongouji. In The Movie, this gets turned back on him as a random stranger mistakes him for a guy he knows... named Kongouji.
- All-Loving Hero: Just like his predecessor, Shouichi is completely selfless, he's only interested in taking care of his friends and protecting innocents.
- Amnesiac Hero: He is depicted as a hero who initially lost his memories at the beginning of the story.
- Henshin Hero: In classic Kamen Rider style, he can summon the Alter Ring at will and transform into Agito by pressing the buttons on both sides of the belt.
- The Hero: The title protagonist of the series.
- House Husband: Is better than everyone around him at housework. The Misugi household basically falls apart without him.
- Laser-Guided Amnesia: He can't remember much save his name And even that isn't his true name.
- Line-of-Sight Name: He gets the name Shouichi Tsugami from an envelope he held. Turns out said name belonged to the person he was to give it to.
- Pungeon Master: Makes horrible puns about everything. Face palms ensue.
- Straight Man and Wise Guy: Whenever he interacts with Hikawa, he plays the wise guy to Hikawa's straight man. The humor comes from Shouichi calmly going with the flow while acting like his usual goofy self, causing the rigid and uptight Hikawa to get flustered. Ozawa Lampshades it in episode 23, telling them to knock off the manzai routine.
- Supreme Chef: He can cook really, really well, and he even plants his own ingredients! Just be prepared to eat a lot of veggies…
Tropes exclusive to him as Kamen Rider Agito
- All Your Powers Combined: Trinity Form has the body of Ground Form, but the arms of Storm and Flame Form. He can utilize the weapons and powers of all three forms at once.
- Deadly Upgrade: In A New Transformation TV Special, Shouichi has problems controlling the power of Burning Form when he first activates it. Ultimately subverted as he manages to control its power and transform into Shining Form.
- Finishing Move: Each form has a different one.
- Ground Form: Rider Kick and Rider Punch
- Storm Form: Halberd Spin
- Flame Form: Saber Slash
- Trinity Form: Fire Storm Attack
- Burning Form: Burning Bomber and Burning Rider Punch
- Shining Form Shining Clash and Shining Rider Kick
- Mid-Season Upgrade: Burning Form.
- Swiss Army Hero: Agito has three basic forms and three super forms, each shift and switch his combat abilities on Multiform Balance, Elemental Powers, and Weapon of Choice. The basic forms are Groundnote , Stormnote , and Flamenote . The super forms are Trinitynote , Burningnote , and Shiningnote .
- Transforming Mecha: His bike, the Machine Tornader, can turn into a hoverboard.
- Weaksauce Weakness: A downplayed version. Want to prevent Agito from using Shining Form? Just fight at night. No more ultimate form...
- Weapon of Choice: Each form has a different one.
Makoto Hikawa/Kamen Rider G3/G3-XA klutzy-yet-capable cop that becomes the main user of the G3-system. Though having a very bad first encounter with Agito due to him being berserk, he eventually joins forces with him and even Gills in protecting the city. His suit, the G3, was actually based on Unidentified Life Form # 4 aka Kuuga himself due to receiving data from two different prototypes and being originally created to fight Unidentified Life Forms. Though lagging behind temporarily, he eventually becomes competitive again with the help of a Mid-Season Upgrade in G3-X.
Tropes that apply to him in general
- Badass Normal: Without the G3/G3-X armor, which he doesn't always have access to (as he's not a Henshin Hero), he's just an ordinary human being with no supernatural powers. This doesn't stop him from being a badass.
- Determinator: The G3 system can be worn by others, but it keeps coming back to Hikawa because, even when the chips are down or he's up against forces that greatly outnumber or overpower his own, he won't back down.
- Deuteragonist: Actually appears before the main character, in both normal and armored forms.
- The Gunslinger: Japanese police officers don't have carte blanche to use, let alone carry, sidearms - the fact that Hikawa has a revolver on him at all times (and not no candy-ass snub-nose, either) says something.
- The Klutz: Fails very hard at all forms of delicate work. Even Shouichi facepalms at how bad his reflexes are. Still, he's very good on the job.
- Secret Keeper: For a very long time, he's the only character who knows Mana has Psychic Powers.
- Straight Man and Wise Guy: Whenever he interacts with Shouichi, he plays the straight man to Shouichi's wise guy. The humor comes from Hikawa being rigid and uptight, getting flustered while Shouichi just calmly goes with the flow while acting like his usual goofy self. Ozawa Lampshades it in episode 23, telling them to knock off the manzai routine.
- Trademark Favorite Food: He's often seen going out for ramen, either with the G3 Unit or with Kouno.
Tropes exclusive to him as Kamen Rider G3/G3-X
- Cool Sword: GS-03 Destroyer. It's a high-frequency vibration blade and works more like a chainsaw in term of usage. It's also completely ineffective - G3 never lands a successful hit with it.
- Gatling Good: GX-05 Cerberus. The most powerful weapon in G3-X's arsenal. Also has a Grenade Launcher mode that involves attaching the GM-01 Scorpion to it.
- Handguns: GM-01 Scorpion. Pretty weak, but easy to use, has good rate of fire and can be augmented with the GG-02 "Salamander" Grenade Launcher attachment.
- Henshin Hero: One of the only Kamen Riders to avert this — the G3/G3-X suit is manually worn. The process is more complicated than the Try Jackets from Tokusou Exceedraft, but less so than, say, Iron Man (film).
- Knife Nut: GK-06 Unicorn. An electromagnetic knife stored on G3-X's left arm that is approximately half as powerful as the GS-03 Destroyer - and he lands some hits with it too!
- Mid-Season Upgrade: G3-X. It was becoming clear that a suit designed to fight Unidentified Life Forms wasn't terribly effective against Unknowns.
- Powered Armor: Muscle enhancement suit with armor on top.
- Stone Wall: Partly because the wearer's a regular human, it's clearly shown taking hits that would seriously injure or stun the other Riders. (At one point, it shrugs off direct lightning strikes). On offense, however, it's slow and unwieldy.
- Super Hero Packing Heat: Not the first Kamen Rider to wield a gun, but the first to center around them.
- Super Prototype: In the A New Transformation TV Special, we see G3 Mild, a weaker model of G3 armor intended for mass production. After the end of the series, the G5 line goes into limited production.
- Weak, but Skilled: The impression G3 leaves, as it wasn't designed to fight the stronger Unknowns (it's based on Unidentified Life Form #04, which shows in the helmet design).
- Weapon of Choice: Unlike the other main riders, G3/G3-X is powered armor and so he has a wider variety of weapons. It primarily covers ranged attacks.
Ryō Ashihara/Kamen Rider GillsOnce a college student with a prominent position on the swim team and a girlfriend he loved, he nearly suffered a Career-Ending Injury when he was hit by a truck while riding his motorcycle. After a miraculous recovery, his body began to randomly transform into the feral creature known only as "Gills". His transformation would terrify those close to him and force him to drop out of college, abandon his swimming career, and lose his girlfriend. Soon after, he discovers that his father, who had gone missing following a voyage on the ship Akatsuki, committed suicide. Finding the Akatsuki's passenger manifest among his father's personal effects, he dedicates his life to contacting the other passengers and finding out why his father was so traumatized by the event.
Tropes that apply to him in general
- Back from the Dead: After he's killed mid-series, Mana's Healing Hands restore him to life.
- Came Back Strong: Resurrection appears to have cured his Painful Transformations.
- Body Horror: First Rider to invoke it after Shin. Being Gills isn't something anyone would choose of their own free will.
- Cartwright Curse: Both of his love interests end up dying. The second seems like she was being set up to avert the trope, but no.
- Cuteness Proximity: His last scene has him adopting a puppy.
- Good Thing You Can Heal: In the Project G4 movie, he has an arm cut-off, but it regrows when he transform into Exceed Gills.
- Painful Transformation: Transforming into Gills causes his body to be wracked with pain, and transforming back resulted in physical degeneration until he comes Back from the Dead.
- Tritagonist: While he's sidelined for the first few episodes, and he's not quite as important to the plot as Shouichi and Hikawa, he's still a major force in the series and is present alongside the other Riders in all promotional material.
Tropes exclusive to him as Kamen Rider Gills
- The Berserker: Because he's a flawed mutation, Gills is more animalistic than Agito. Lots of emphasis is placed on his screaming and his fighting style.
- Blade Below the Shoulder: He can grow blades protruding from his wrists and ankles.
- Combat Tentacles: Played with. Gills has no control over his wrist tentacles beyond extension or retraction, and uses them only as striking weapons. Play straight as Exceed Gills, who can fully control them and has another set of tentacles from his shoulders as well.
- Finishing Move: Gills Heel Claw/Exceed Heel Claw and Gills Hell Stab.
- Glass Cannon: Of a sort - his body is failing and he can actually get beaten even by G3, but glass doesn't walk it off and come back angry.
- Healing Factor: Has an extreme regenerative ability, including being able to regrow a torn off arm.
- Stealth Pun: Why is he called Gills? Because the Japanese word for "gills" is agito.
- Super Mode: Eventually gains the ability to transform into the stronger Exceed Gills form.
Kaoru Kino/Another Agito
Tropes that apply to him in general
- Back-Alley Doctor: After he lost his (original) arm, he lost his medical license, but he continues to practice.
- Combat Medic: Before he was a Kamen Rider, he was a doctor, and he still has all his medical skills.
- Deadly Doctor: Before his Heel–Face Turn.
- Evil Hand: Inverted, as it's a Good Hand. After he lost his arm, his dead brother's arm was grafted on to him. Some of his brother's consciousness is still in the arm, as his own hand has stopped him from going too far off the deep end.
- Heel–Face Turn: His delusions of grandeur ultimately motivated him to try and eliminate others who had the Agito Seed and Kamen Rider Agito. It wasn't until his defeat at the hands of Exceed Gills and being saved from drowning that Kino became humbled. From that point on, he would aid the other Riders, even after the Overlord stole his power.
- Heroic Sacrifice: In episode 46. Dies from the injuries he endured while performing a small surgery on Shouichi in an attempt to remove the quill of Ericius Liquor from his body, though he endured them long enough to join Agito and Gills in a Triple Rider Kick.
- Mythology Gag: Deliberately resembles the original Double Riders, right down to the lack of weapons. The emphasis placed on his replaced right arm is also similar to Riderman's.
- Put on a Bus: In-franchise, he didn't return in later crossovers after his death - he didn't have a counterpart in Decade's "World of Agito" arc, and he wasn't part of the rider reinforcements led by Akira Date in OOO, Den-O, All Riders: Let's Go Kamen Ridersnote . However, he finally ends up returning as a part of the special Kamen Sentai Gorider for Kamen Rider × Super Sentai: Chou Super Hero Taisen, over 15 years after his on-screen death. Unlike the aforementioned Alternatives, however, he appears untransformed.
- Redemption Equals Death: Adds to the allusions to Riderman, except Kino gets Killed Off for Real.
- Sixth Ranger: Doesn't appear until the second half of the series.
Tropes exclusive to him as Another Agito
- Finishing Move: Assault Kick.
Shiro Mizuki/Kamen Rider G4
Tropes that apply to him in general
- Death Seeker: Explicitly mentions to Hikawa that he embraces death whereas Hikawa embraces life.
- Determinator: He's fully aware of how G4 can kill its operator, that doesn't stop him.
- Start of Darkness: He states that during the scene in the start of the movie that he was more akin to Hikawa in terms of personality. However, after surviving the attack and hearing about Hikawa's heroics in relation to the Akatsuki incident, which made him resolve to fight without fear of dying.
Tropes exclusive to him as Kamen Rider G4
Mana KazayaA teenage girl with Psychic Powers who was orphaned when her father was murdered under mysterious circumstances. She ended up being taken in by her father's best friend and her Honorary Uncle, Yoshihiko Misugi. Like Shouichi, she is part of the Misugi household but isn't related by blood and has a mysterious background that even she doesn't fully understand. She's effectively a sister to Shouichi, and she's the only person Shouichi ever really opens up to.
- Clingy Jealous Girl: Really likes Shouichi, and is jealous of any girl that gets near him.
- Healing Hands: She can do this until she burns out the power resurrecting Ryou from the dead.
- Joshikousei: She's 16 at the start of the series, and her 17th birthday is part of episode 13's plot. We see her in her school uniform a few times, too.
- Kid Detective: Uses her Psychic Powers to help Hikawa solve cases.
- Parental Abandonment: Her mother died when she was young and her father was accidentally killed by Shouichi's psychic sister.
- Psychic Powers: She has a variety of them.
- Extra-Sensory Perception: She can, for example, read a card without looking at it.
- Psychometry: She can read any memories associated with any object just by touching it.
- Mind Reading: She once read the answers to math problems from her tutor's head.
- Prediction: Can see events that immediately take place in the future. Is a plot point in The Movie.
- Secret Keeper: She finds out Shouichi is Agito early on, and for a while she's the only one who knows.
Metropolitan Police Department
Sumiko OzawaThe commander of the G3 Unit and the creator of the G3 System. She's blunt, abrasive, snarky, technically brilliant, street-smart, and fiercely loyal to her team. In the field, she acts as Hikawa's Mission Control, and outside the field, she works to shield the G3 Unit from departmental politics.
- Benevolent Boss: She protects her team from departmental politics, and she's the kind of boss you can hang out and have a drink with.
- Broken Pedestal: After she realizes she's done too good of a job on the G3-X's AI, she goes to her mentor for help creating a limiter chip to prevent the AI from overwhelming the user. She soon finds out that her mentor has hated her guts for years out of jealousy, though he still gives the chip to her to prove he can create something she can't.
- Brooklyn Rage: She's from NYC, and she acts like it. If you try to mess with her or her team, she will slag you off as bluntly as possible.
- But Not Too Foreign: She was born and raised in New York City and was educated at MIT. Despite this, she's ethnically Japanese, her actress is a native-born Japanese woman, and she's only rarely seen speaking English.
- Child Prodigy: She was this in her youth. She enrolled in MIT at 12, and by 15 she was MIT's top-ranked Ph.D. candidate.
- Deadpan Snarker: Enjoys snarking back at Houjou's Jerkassery. Case in point, after Houjou finds out she picked Shouichi to pilot the G3-X, he asks her what kind of man Shouichi is. Ozawa responds with "Height: 2 meters. Weight: 100 kg. A man who can shatter boulders, with a computer for a brain."
- Gadgeteer Genius: Single-handedly developed the G3 and the G3-X.
- Improbably High I.Q.: Averted. Houjou does bring up her IQ when discussing how brilliant she is, but he just says it's "over 180", which lines right up with the "highest genius" IQ range in the real world.
- The Lad-ette: She's exceedingly blunt, making it a point to slag off anyone she has a problem with to their face. She's also a heavy drinker: in one episode, she had no less than seven pints of beer in one sitting, and she didn't come off as even slightly drunk afterwards! Then you add the fact that she's got some aspects of Wrench Wench (with her being the creator of the G3 System and all)...
- Mission Control: As the commander of the G3 Unit, she gives orders to Hikawa while he's fighting.
- Trademark Favorite Food: She goes out for yakiniku when she's stressed.
Takahiro Omuro/Kamen Rider G3 MildA technician in the G3 Unit. He performs maintenance on the G3 System when it's not being used, and he acts as backup to Ozawa in her role as Hikawa's Mission Control.
- Lampshade Hanging: The fact that he doesn't get to do much is lampshaded. He wants his Day in the Limelight so badly, but it never happens.
- Mission Control: He performs a secondary role, after Ozawa, in being this to Hikawa.
- No Social Skills: He really isn't too bright where social situations are concerned.
- Took a Level in Badass: Averted. He does manage to become Kamen Rider G3 Mild in the A New Transformation special...which, due to the model aimed at being a mass-produced version of the G3 system, doesn't allow him to put up much of a fight against the Lords (since the G3 system was made with the intent of fighting the Gurongi).
- Those Two Guys: Much like Kouno, he really doesn't get to do much. He's mostly there in the background. When he's not working on the G3 or acting as a secondary Mission Control, he's typically acting as an extra contributor to Ozawa and Hikawa's conversations, occasionally piping up to put his foot in his mouth without saying anything substantial.
Tooru HoujouA detective with the Metropolitan Police Department, Houjou was a candidate to become the G3's user but was ultimately rejected in favor of Hikawa. Not happy with being passed over, he begins several schemes to get Hikawa kicked out and take his place. Eventually, he abandons these schemes in favor of plotting to have the G3 replaced by his own system, the V1, among other plans. He's definitely a Jerkass, a Smug Snake, and The Rival to our heroes, though he never crosses the line into outright villainy.
- Broken Pedestal: His mentor turns out to be a murderer.But his sister got murdered.
- Jerkass: Very much not a nice guy. He's constantly scheming to get rid of or sometimes take control of the G3 Unit.
- Passive-Aggressive Kombat: With the entire G3 Unit, but especially Ozawa.
- Pet the Dog: Despite all his Jerkassery, he's had two moments where he does the right thing for the right reason. This is to demonstrate that while he may be a colossal jerk, he's not actually evil:
- When Houjou discovers his mentor is a murderer, he turns the guy in despite the massive amount of respect he has for him.
- When Hikawa starts going blind from stress, Houjou acts as Hikawa's eyes to help him fight an Unknown, with no apparent ulterior motive.
- The Rival: To Hikawa and Ozawa. The Distant Finale implies that his rivalry with Ozawa was friendly all along.
- Smug Snake: He's always got a scheme under his sleeve.
Kouji KounoA detective with the Metropolitan Police Department. He's often the one to discover new Locked Room Mystery murders, causing S.A.U.L. to get involved. He's one of the few people who can actually stand Houjou, and he's friends with both Houjou and Hikawa.
- Alliterative Name: Kouji Kouno.
- Inspector Lestrade: With a few exceptions, his detective work largely consists of handing cases over to S.A.U.L. by determining them to be too impossible to be the work of anyone other than the Unknown. He's kind of like a Friend on the Force, but instead of being a police liaison to a civilian detective, he's the regular police liaison to Hikawa and his group of special agents.
- Morality Pet: To Houjou. He's both the only person who can stand Houjou and the one person Houjou won't talk down to.
- Those Two Guys: Much like Omuro, his role in the series is fairly minor; he exists mostly as someone to discover new murders and for Hikawa and Houjou to talk to during their downtime.
- The Watson: Hikawa often discusses details of his cases with Kouno, using him as a sounding board for various ideas.
Risako FukamiA member of the JGSDF's GA division. She's assigned to work with the G3 team, but quits shortly after stealing the plans for the G4 system.
- Big Bad: Of Project G4 - while the Ant Lords are the ones to get the plot rolling, were it not for her, the Ant Lord attack would be just a normal episode. Additionally, she was in charge of the facility that the Ant Lords attacked in the first place.
- Did Not Think This Through: She was able to make the G4 system more powerful than the G3-X system, but didn't take into account the possibility of Hikawa fighting not as G3-X, but as himself, which is ultimately what lets Hikawa defeat G4.
- Family-Unfriendly Death: Although she doesn't die in the way shown in the movie (which is being sprayed with liquid, causing the victims to "drown" out of water), she is Eaten Alive by the Ant Lords.
- For Science!: People died using the G4 system in the past? Not a problem if it means that the system makes the user more powerful than humanly possible. She's also not above using children (or Mana) to advance the system, as noted below.
- Ungrateful Bastard: Views Ozawa as this, thinking that she did Ozawa a favor by completing the G4 system.
- Would Hurt a Child: Has no problem using Sayaka to allow the G4 system to predict their opponent's moves. She just doesn't get a chance to due to circumstances.
Overlord of Darkness
- Anti-Villain: His motivation is simply fear that humanity may one day overpower him. When he realizes that he didn't understand mankind, he decides he needs to give them a chance to proceed and grow.
- Big Bad: He's in charge of the Unknowns, he's responsible for everything in the series literally, as he's God and the final battle is fought against him.
- Dark Is Not Evil: The Overlord of Darkness isn't exactly evil, just afraid humanity will overpower him and trying to wipe out those who could do so. And in the end decides to let mankind move on.
- God Is Evil: the Overlord of Darkness is actually the creator of humanity, who sees them as his pets
- God Is Flawed: However, he still isn't exactly malicious, but had little understanding of his own creation.
- Heel Realization: Realizes in the end his assault on humanity was wrong and he simply doesn't understand his own creations. He chooses to sit back and watch how things go.
- Karma Houdini: Despite the above Heel Realization, he does still get away with causing a lot of deaths.
- Leitmotif: Ominous Latin Chanting, particularly in his child form.
- Murder Is the Best Solution: His way of dealing what he perceives as a threat.
- Villainous Breakdown: Shouichi punching him sends him into one, going from only wanting to kill potential Agitos to wanting to wipe out humanity.
- All There in the Manual: The individual names of the Lords are never given onscreen and can be found in supplemental materials. In fact, they're never even referred to as Lords, but rather as the Unknown, though their real real name, the Malakh, can be seen written down in Yukina's letter to Shouichi very briefly.
- Altum Videtur: The naming pattern for the Lords, save for the El. Each name consists of two Latin words: genus + descriptor. Example: Pantheras Luteus = Leopard/Panther Saffron Yellow. Though, as to be expected, some translations can get blurred.
- Bee Afraid: Apis Vespa and Apis Mellitus.
- Delayed Reaction: Panteras Magistra, who shrugs off Agito's kick and laugh in confidence...before she suddenly feel pain on her chest and explodes.
- Even Evil Has Standards: They specifically to target humans blessed with the seed of Agito (those whom have supernatural abilities). Killing normal humans (unless said human had committed murder) is a taboo and the penalty is forced suicide. The Ant Lords somehow bypass this rule.
- Everything's Squishier with Cephalopods: Mollipes Octipes, who has regenerative abilities.
- Feathered Fiend: Volucris Ulucus and Volucris Falco
- Leitmotif: A creepy plays when they're about to murder someone, or sometimes when their victims are discovered.
- Monogender Monsters: Averted with the inclusion of female Lords.
- Monster of the Week: Some for a week; others fortnight. They also often subvert the formula by showing up two or three at a time.
- Our Angels Are Different: To drive the point home, each Lord has wing-like appendages sticking out of their backs, they have halos that appear at various points, and the Creation Myth refers to them as the Malakh, which is Hebrew for "angel".
- Palette Swap: Some Lords are grouped by animal genera; therefore, the costumes are similar. Female Lord costumes avert this.
- Panthera Awesome: Pantheras Luteus, Pantheras Albus, Pantheras Tristis, Pantheras Rubeo, Pantheras Cyaneus, and Pantheras Magistra. Not so awesome in this case, as the first set are dispatched in the first two episodes.
- Punch-Clock Villain: They could be called such, as they simply carry out the Overlord's will...but some of them, like the Crow, Snake and Bee Lords, are clearly shown taking sadistic pleasure in their kills.
- Rule of Symbolism: Bringing out religious references further, a halo appears above them when they summon a weapon or are about to die. They also make prayer hand gestures before killing a victim.
- Scary Scorpions: Leiurus Acutia.
- Shout-Out: The first monster faced was a leopard with a red scarf, a design similar to a powerful demon, Ose, in the Shin Megami Tensei video games.
- Strong Ants: Formica Eques, Formica Regia, and the Mooks Formica Pedes. Only seen in The Movie.
- Turtle Power: Testudo Oceanus and Testudo Terrestris.