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S.G.S Foundation (The Boukengers)
Satoru Akashi / Bouken Red
Satoru Akashi / Bouken Red | Actor: Mitsuomi Takahashi
The Fiery Adventurer, as Bouken Red he drives Go Go Dump and leads the team with a calm expression and a fire in his heart. He mostly battles against Ryuuwon of the Jaryuu Tribe. He is often called Chief by the other Boukengers.
- The Ace: Got his reputation for being able to get any treasure anywhere.
- Always Someone Better: Proves this to Masumi, especially towards the finale.
- Butt-Monkey: Eventually developed a mild case while maintaining his cool persona. An entire episode was dedicated to taking this trope to the extreme, by way of a bad luck curse.
- Captain Ersatz: Very similar to Akarenger in terms of personality.
- Contrasting Sequel Main Character: To Ryu Tendo, both having lost the girls they loved in missions before becoming team leader of a Super Sentai team whose nemesis is a Fantastic Racist. But while Ryu's fiance turned out to be alive and brainwashed by the antagonists, Satoru's girlfriend stayed dead.
- Catchphrase
- *snaps fingers* Attack!
- Good job!
- The Comically Serious: You wouldn't believe how funny this serious guy can be.
- Dark and Troubled Past: Before he joined SGS, it revealed early-on that his partners, Kyoko and Masaki died in a blaze trap, leaving him the only survivor. He retired from adventuring soon afterwards, but got hired by SGS to do it all over again.
- Determinator: When he sets his mind to something, he will not stop at all costs. His willpower was enough to control GoGo Drill, a GoGo vehicle prone to overloading its drivers.
- Dub Name Change: "Keine" in the Korean dub.
- Finishing Move: Red Zone Crash
- Hot-Blooded: It's hard to believe since he's rather serious-looking, but when he gets fired up - he can be just as bold and determined as the rest of them.
- Image Song: "The Greatest Precious"
- Last-Name Basis: Those who don't refer to him as Chiifu or BoukenRed just call him Akashi.
- Law of Chromatic Superiority: Obviously as a red ranger.
- The Leader: The "chief" of the team, leading the others through adventures with strength and courage.
- Married to the Job: He is a Boukenger by heart and soul and doesn't really have anything else outside of his job.
- Mr. Exposition: He's generally the one who gives exposition regarding the Precious of the week, as well as different things related to adventuring and the S.G.S.
- Not Quite Dead: After seemingly exploding with the Precious Bank, Satoru appears safe on the Dai Voyager in time for the final battle due to Zuuban.
- Oblivious to Love: He has no idea of Sakura's feelings for him. Although it's hinted they got a Relationship Upgrade in between the end of the series and Juken Sentai Gekiranger vs. Boukenger.
- Playing with Fire: His Bouken Bo primarily uses flame-based attacks to gain the advantage.
- Serious Business: Akashi took his 'adventuring' business way too seriously. When he got passed for an adventuring school because of his test paper getting swapped by accident, he ended up in a Corner of Woe.
- Signature Move: Javelin Crash
- Standardized Leader: He initially seems like one, being the serious, determined leader of the Boukengers, but underneath that exterior lie a man with quite the Dark and Troubled Past. He can also be exceptionally hilarious, albeit unintentionally.
- Swiss-Army Weapon: His Bouken Arm has two modes.
- Two Guys and a Girl: The make up of his treasure hunting team in his Backstory.
Masumi Inou / Bouken Black
Masumi Inou / Bouken Black | Actor: Yasuka Saito
The Fast Adventurer, as Bouken Black he drives Go Go Formula, a racecar-like vehicle, and is only part of the Boukengers to pay his debt back to Akashi for saving his life. He has a personal vendetta against Yaiba of Darkness of Dark Shadow.
- Always Someone Better: Satoru is this to him. He luckily gets over it as the season goes on.
- Big Brother Instinct: He acts as something of a brother figure to Natsuki, his Morality Pet and is very protective of her.
- The Big Guy: As reflected by his hammer, he's the member that relies on physical strength the most.
- Butt-Monkey: He's the one most often on the receiving end of misfortune.
- Can't Live with Them, Can't Live Without Them: As part of his character development, it turned out his treasure was being part of the team.
- Captain Ersatz: A womanising Black hero? Is that you, Gai?
- Dark and Troubled Past: Spent some time as child around a bunch of abusive workers, and then ended up using them as a Human Shield when they were killed by Yaiba.
- Dub Name Change: "Ray" in the Korean dub.
- I Owe You My Life: The reason he joined the Boukengers is to repay Satoru.
- Image Song: "Black Drive"
- Like Brother and Sister: His relationship with Natsuki. They're like a protective older brother and his naive little sister.
- The Lancer: In early episodes, where he is the Boukengrr who frequently tends to clash and disagree with Akashi. In later episodes this is downplayed in favor of him being The Big Guy.
- Parental Substitute: To Natsuki, to an extent. He was the one who found her with no memories who she is and ever since then he has taken care of her, acting as something of a father figure to her. Masumi's actor has stated that Masumi sees Natsuki as a little daughter he needs to protect.
- Platonic Life-Partners: With Natsuki. Ever since he found her, they go everywhere together, do everything together, and they are like family to each other.
- Rank Up: The final episode sees him becoming the chief of SGS after Akashi leaves for space to find Precious.
- Revenge: His motive when fighting Yaiba, as stated in his Dark and Troubled Past above.
- Savvy Guy, Energetic Girl: Savvy Guy to Natsuki's Energetic Girl.
- Sensitive Guy and Manly Man: Manly Man to Souta's Sensitive Guy.
- Shock and Awe: His Radial Hammer primarily uses lighting-based attacks.
- Signature Move: Hammer Break and later Hammer Dynamite.
Souta Mogami / Bouken Blue
Souta Mogami / Bouken Blue | Actor: Masashi Mikami
The High-Up Adventurer, as Bouken Blue he drives Go Go Gyro, an airplane-like vehicle, and serves as the team's information specialist. Before he joined the Boukengers, he was an international spy which is why he's so effective at finding info. He often finds himself fighting (and flirting with) Shizuka of the Wind of Dark Shadow.
- Blow You Away: Primarily utilizes wind-based attacks through his Blow Knuckle.
- Captain Ersatz: His tendencies resemble Battle France.
- Catchphrase: Sou sou, soutanote
- The Charmer: Part of his spy training for obtaining information.
- Dating Catwoman: He has expressed interest in dating Shizuka of the Wind.
- Dub Name Change: "Ryuu" in the Korean dub.
- Evil Knockoff: In Task 8, a living Precious transforms takes his form and attacks the Boukengers.
- Handsome Lech: He's a good looking man, but his looks are tempered by his flirtatious personality.
- I Hate Past Me: Regrets his past as a spy, having played a role in causing strife around the world, and hopes to make up for it by making people smile as an adventurer.
- Image Song: "Blue for You"
- Power Fist: Blow Knuckle
- Sensitive Guy and Manly Man: Sensitive Guy to Masumi's Manly Man.
- Signature Move: Knuckle Cannon
- The Smart Guy: The information expert of the team who is in charge of strategies and management of technology.
- Wouldn't Hit a Girl: He admits that beautiful women make him go easy on them, which is a main problem when he goes up against Shizuka.
Natsuki Mamiya / Bouken Yellow
Natsuki Mamiya / Bouken Yellow | Actress: Chise Nakamura
The Strong Adventurer, as Bouken Yellow she drives Go Go Dozer, a giant bulldozer, and is the most childish of the group. Her main reason to adventure was to discover more about her own past.
- Action Girl: She's a ditz to a fault, but she is still just as competent of a fighter as the rest of them.
- Amnesiac Hero: She has no memories of her past. She joined the team's adventures to discover her own past.
- Brainwashed and Crazy: When Natsuki touched the Sun of Lemuria, Rei brainwashed her into thinking that her parents' desire and her sacred duty was to activate it and destroy humanity.
- Captain Ersatz: Has a similarly perky personality to Ako.
- Damsel in Distress: She spends most of her time getting herself in trouble and someone of the team, usually Masumi, has to save her.
- Dishing Out Dirt: Her main fighting style revolves around using hr Bucket Scoopers to dig up the dirt around her and throw it as the enemy.
- The Ditz: Not the smartest member of the time and the one easier to trick.
- Dub Name Change: "Hannah" in the Korean dub.
- Expository Hairstyle Change: She loses her Girlish Pigtails when she gets brainwashed in the Lemurian Princess episodes.
- Genki Girl: Very energetic and optimistic.
- Girlish Pigtails: She wears her hair in twintails, to highlight her childish personality.
- Human Popsicle: One hundred-thousand years ago, her parents, knowing their civilization's nearing demise, left Natsuki in a Sleeping Capsule that would slow her growth speed to a rate of 1 year for every 5,000 years. She woke up when Masumi found her in the ruins.
- Image Song: "Secret Treasure"
- Improbable Weapon User: The Bucket Scoopers, which are literally just a pair of bulldozer buckets that are placed on her hands. They are surprisingly effective.
- The Ingenue: Very naive, childish and easy to trick.
- Kawaiiko: Obviously with her Genki Girl attitude.
- Last of Her Kind: It is later revealed that she is the last survivor of the Lemurian civilization.
- Like Brother and Sister: She's basically Masumi's little sister, with him always been there to watch over her and protect her when she gets in trouble.
- Morality Pet: To Masumi. She's the only one who can bring out his softer side.
- The Not-Love Interest: To Masumi. They're very attached to each other, he only brings out his caring and protective side around her and Natsuki is explicitly stated to be "the light to Masumi's darkness". Despite this, they aren't romantically involved. The actors stated in interviews that the characters' relationship was akin to that of parent-child or brother-sister.
- O.O.C. Is Serious Business: As Lilina, she becomes disturbingly stoic and dispassionate to the pleas of her team as she focuses on her "goal" of destroying humanity.
- Platonic Life-Partners: With Masumi. While not in a romantic relationship, they go everywhere together, do everything together, and since Natsuki has no memory of anything that happened in her life before she met Masumi, he's like the only family she has.
- Princess Protagonist: The princess of the lost ancient kingdom of Lemuria.
- Savvy Guy, Energetic Girl: Energetic Girl to Masumi's Savvy Guy.
- Signature Move: Scooper Phantom
- Third-Person Person: She often refers to herself in third person.
- Tomboy and Girly Girl: Girly Girl to Sakura's Tomboy.
Sakura Nishihori / Bouken Pink
Sakura Nishihori / Bouken Pink | Actress: Haruka Suenaga
The Deep Adventurer, as Bouken Pink she drives Go Go Marine, a giant submarine, and is the most serious member of the team when it comes to work. Before she joined the Boukengers she was in the special forces of the military.
- Action Girl: She's smart, strong, and drives a submarine, and that's all in addition to being a ranger.
- Aloof Dark-Haired Girl: Downplayed. She has black hair and initially appears to be aloof and stand-offish due to taking her professional very seriously, but she is actually very nice and easy to get along with.
- Captain Ersatz: One to Peggy Matsuyama.
- Catchphrase: "Use codenames while on a mission." Usually when someone her junior called her with name rather than 'Pink'
- Cherry Blossom Girl: Her name is Sakura, her color is pink, her Image Song is also named Sakura and she has romantic feelings for her leader.
- Cool Big Sis: Her role in the team, primarily to Natsuki.
- Defrosting Ice Queen: She leanrs to loosen a bit and is eventually able to express her feelings for Satoru in the end.
- Dub Name Change: "Yumi" in the Korean dub.
- Grand Theft Me: By Pacha Kamaq XII in the Juken Sentai Gekiranger crossover movie.
- Hand Cannon: Hydro Shooter
- Image Song: "Sakura"
- Lady of War: She is prim and proper and wears pink, but is the second-in-command of the team.
- The Lancer: Being Satoru's second-in-command and her strict, no-smiling personality contrasts with his outgoing, inner-Hot-Blooded personality.
- Making a Splash: Her Hydro Shooter obviously uses water-based attacks to take out enemies.
- Meaningful Name: She's the Pink Ranger.
Her name becomes even more meaningful when you realize her Power Rangers counterpart was named "Rose." - Not So Above It All: Sakura always maintains a serious and stoic attitude, but she also has some silly movements especially in Task 37, where she acts similar to Natsuki.
- Not So Stoic: She's The Stoic most of the time, but if the situation is dire enough she'll let out her emotions, particularly when Chief or her teammates or in danger.
- In The Movie she freaks out at the site of a horde of Big Creepy-Crawlies.
- When Satoru makes an attempt to sacrifice himself to destroy the Questers in their unbeatable mecha in #42, she completely loses it and starts crying and pleading with him not to go through with it.
- Number Two: Official second-in-command and "sub-chief" of the team.
- Raven Hair, Ivory Skin: Black hair, pale skin and incredibly beautiful at that.
- The Runaway: She ran away from her parents and joined a special army school to find her destiny.
- Signature Move: Shooter Hurricane
- The Stoic: Sakura is very serious most of the time and barely ever smiles.
- Subordinate Excuse: It's pretty clear she has a crush on Akashi. In the finale, she accompanies him into space for a chance to spend more time with him.
- Sugar-and-Ice Personality: She often appears to be cold and emotionless, but cares for her teammates, especially Akashi.
- Tomboy and Girly Girl: Tomboy to Natsuki's Girly Girl.
- When She Smiles: It's adorable. Plus, as Satoru said, it's one thing only she possesses, and it becomes her greatest treasure in the end.
- Why Did It Have to Be Snakes?: She's afraid of bugs.
Eiji Takaoka / Bouken Silver
Eiji Takaoka / Bouken Silver | Actor: Masayuki Deai
The Dazzling Adventurer, as Bouken Silver he drives Go Go Fire and serves as the spiritually strongest of the team. He mostly battles against Gai (as either form) due to their bitter history. In Boukenger vs. Super Sentai, he embodies Hope.
- Chrome Champion: He is named Dazzling Adventurer for a reason. Half of his suit is shiny silver.
- Captain Ersatz: Eiji has more than a few similarities with Burai.
- Dark and Troubled Past: When he was a kid, he witnessed his father getting killed by Ashu.
- Defrosting Ice King: He was initially cold and rude towards the Boukengers but gradually warm up to them after they accept him as their comrade.
- Dub Name Change: "Jackie" in the Korean dub.
- Extra-ore-dinary: He's capable of using metal in his ranger form.
- Extreme Herbivore: A Running Gag. He often bites into a vegetable of some kind to make a dramatic pause after saying something and has even snuck a celery or a bellpeper in someone's possesion in place of a Precious.
- Half-Human Hybrid: His human father, the Ashu Watcher Kando wed with the Ashu Kei, making Eiji half-Ashu.
- Hunter of His Own Kind: He hunts the Ashu Tribe, despite being half-Ashu himself.
- Image Song: "Blown by a Silver Wind"
- Ineffectual Loner: His solitary approach works until the Ashu Gai and Rei are brought back as Questers by Gaja and he can't keep fighting them on his own. He resists joining the team for a while, but eventually relents and actually starts to like his teammates after a while.
- It's Personal: Hunting Ashu is business as usual for him, but has a personal vendetta with Gai on account that he killed his father in front of him when he was a boy.
- Jerk with a Heart of Gold: He is arrogant, brash and just plain antisocial at times as a result of growing up alone and with the guilt of blaming himself for causing his father's death. He comes to care about the team greatly as time passes even thought he may not always show it.
- Signature Move: Sniper Gatling
- Sixth Ranger: Joins the team much later in the series and gives them a new powerful member.
- Stealth Hi/Bye: Was capable of doing this even before becoming a Boukenger.
- Trademark Favorite Food: He's seen constantly eating vegetables. In the crossover with Gekiranger, he even decides to have a vegetable eating contest with Gou and Ken.
- Vitriolic Best Buds: He butts heads with Masumi all the time, but they care about each other just as much as about everyone else on the team.
S.G.S. Allies
Morio Makino
Morio Makino | Actor: Shigeru Saiki
An inventor who analyzes the Precious and keeps the Boukengers' mecha maintained.
- The Professor: Responsible for studying the Precious and keeping up repairs on the Boukengers' technology.
Mister Voice
Mister Voice | Actor: Nobuo Tanaka, Rio Konno (true identity)
A mysterious voice who appears as a computer graphic on the wall.
- Big Good: He's the head of SGS and main benefactor to the Boukengers.
- Samus Is a Girl: He turns out to be the little girl Masumi and Sakura meet in episodes 47 and 48.
Negative Syndicates (The Villains)
In General
- Color-Coded Armies: Each faction has a different dominant color in their palette. Gordom is white, Jaryuu is red, Dark Shadow is blue and the Questers are black.
- Faction Calculus:
- The Jaryuu Clan is the Powerhouse faction, having tougher Mooks and stronger monsters.
- The Gordom Civilization is the Subversive faction, having weak Mooks that come in large numbers and no monsters of their own.
- Dark Shadow is the Balanced faction, having moderately tough monsters and no Mooks, which they compensate for by having two skilled fighters in their ranks and by borrowing Karths on occasion.
- The Questers are the Cannons faction, having two very strong members and a new Humongous Mecha each week, but no mooks or monsters.
- Mooks: Combatant Karths for the Gordom Civilization and Jaryuu Soldiers for the Jaryuu Clan, though both the Jaryuu Clan and Dark Shadow also use Karths on occasion.
- Nebulous Evil Organization: They're all evil organizations seeking to use the Precious for their own sinister ends.
- Rogues Gallery: All of them pose more-or-less equal threats to the Boukengers and take turns serving as the villains of an episode.
- Villain Team-Up: They'll form alliances with one another when convenient. Though they'll just as easily betray each other when convenient as well.
Gordom Civilization
In General
An ancient civilization founded around worship of a deity called "Gordom".- Advanced Ancient Humans: They appear to have been human to some degree, although Gajah is the only member of Gordom we see and his humanity is very much in question.
- Lost Technology: On account of making contact with an alien deity, the technology they wield is unusually advanced and very alien.
- Monster of the Week: Averted for the most part. Gordom usually relies on the episode's Precious to be the monster of the week. The closest they have besides that are the Giant Gods, though only two are made and one is stolen by the Questers.
- Oddly Small Organization: Especially compared to the other Negative Syndicates. In most episode they're only comprised of Gajah and a dozen or so Karths. They compensate by either forming alliances with other Negative Syndicates or exploiting the Precious of the episode.
- Religion of Evil: Considering their religion revolves around a so-called "Destruction God", it's safe to say it isn't a very benevolent one.
- Villain on Leave: You can go as many as six or seven episodes without having Gordom appear once.
High Priest Gajah of the Gordom Civilization | Actor: Hiroo Otaka
- A God Am I: In the final episodes he seeks to become one with Gordom by absorbing its Heart and Brain. After his transformation into Gajadom, he boasts to have surpassed Godom.
- Big Bad Ensemble: He's the first of the four main antagonists to appear, following shortly thereafter by Ryuuwon and then Gekkou of Illusions, and much later Gai. Of the four, Gajah is the least proactive, is easily bullied by his fellow Big Bads and only plays a direct role in a handful of episodes although he ends up being the Final Boss, though only after the other players in the ensemble are all taken care of.
- Book Ends: Is both the first villain the Boukengers face and the last.
- Evil Genius: He's a skilled inventor, has a Photographic Memory and is adept at altering his civilization's Lost Technology to be compatible with modern inventions.
- Evil Old Folks: Even with his immortality, he's still an old man, and a very wicked one at that.
- Ineffectual Sympathetic Villain: In early episodes, he gets beat up rather easily in each appearance he makes. Ryuuwon once just walked into his lair threatening information of out of him.
- Final Boss: He's the last villain to be taken care of.
- Homage: Gajah is themed after Varrucane from Himitsu Sentai Gorenger while his One-Winged Angel form is themed after Oh Blocker in Chouriki Sentai Ohranger.
- Kick the Dog: When one of your plans involves stealing from Santa Claus, you're definitely a unique type of scum.
- Large Ham: Boy howdy.
- Last Plan Standing: Waits until the Questers and Yaiba are dead before he puts his plans into action. Ryuuwon bites not long after, leaving Gajah as the only contender to be the Final Boss.
- Laughably Evil: With him being an old man out of his time and how much he gets ragged on by other factions, it's hard for him not to fall into this.
- Mook Maker: Can spawn his Karths out of any stone.
- Psycho Rangers: During the short segment on Super Sentai examples of this trope, Gajah forms Gajah Dengekitai. Fittingly, Gajah calls himself Big One.
- One-Winged Angel: In the finale as a result of his consuming the Heart of Godom and entering a cocoon, before emerging in a monstrous form he calls Gajadom.
- Orcus on His Throne: Gajah owns no specific Monster of the Week to call upon, and can't really fight on his own, so he usually stays in the background, only striking with well-thought out schemes... Until some of the final arcs.
- Photographic Memory: Has one, leading him to create the Godom engines after simply taking ONE look at the designs for the Parallel Engines that the Boukengers use, creating the Questers.
- Sinister Minister: The arch priest of the Gordom, and a very creepy one at that.
- Sole Survivor: He's the only surviving member we see of the Gordom Civilization.
- Super Power Lottery: After gaining his One-Winged Angel form.
- Suspended Animation: He spend the past few centuries in one until the Boukengers awaken him in episode 1. After his final defeat and reverting back to his regular human form, he reenters his sleep in hoping of reawakening again someday.
- Took a Level in Badass: By the finale, he adds three Godom engines to himself and beats the tar out of Ryuuwon and the Boukengers, and that's before his One-Winged Angel where he gets the Heart of Godom.
- Villain Decay: An inversion. He starts off the series a borderline-Ineffectual Sympathetic Villain but gradually becomes more dangerous as the series goes on. Culminating in him becoming the Final Boss once all the other villains are defeated.
Combatant Karths
White stone-like grunts who serve the Gordom Civilization
- Cannon Fodder: The Karths are easy to produce and just as easy for the Boukengers to cut down.
- Homage: For Tackle Boy in Chouriki Sentai Ohranger.
- Mook Carryover: Gajah is prone to loning them out to other Negatives. Dark Shadow use them whenever they need Mooks, and Ryuuwon has also utilized them on a few occasions.
- Zerg Rush: While not very strong, they can be quite tricky when they attack in large numbers.
Giant God Gordom
The transformed state of the Gordom shrine, modeled on their very own namesake deity.
- Homage: Based on the Variblune from Himitsu Sentai Gorenger.
- Starter Villain: It is the very first Monster of the Week the Boukengers fight.
- Transforming Mecha: Can shift between being the shrine of Gordom and a giant war robot.
Mogari
A samurai-like living statue created to guard a long lost village. It attacks anyone splashed with water from the Kubi flask.
- Homage: It's design is modeled after Battle Fever Robo. The way it enlarges is also a reference to the way Egos Monsters became giant, by summoning an identical large copy of themselves.
- Implacable Man: Incredibly durable, to the point where most of the Boukengers' attacks bounce off of it. It takes Satoru jumping down on it and creating a weak point in its shoulder to defeat it.
- Punch-Clock Villain: It's not really evil, being as it was originally created to defend a village. Gajah just turned it against the Boukengers.
- There Is Another: After the Boukengers defeat it, Gajah reveals that the Mogari they fought was really just a "switch" for a giant-sized Mogari.
Modified Mythical Beast Gordorum
Originally an ancient Lemurian bioweapon, Gajah modified its egg to spit out a beast called "Gordorum" loyal to him.- Homage: Modeled on Magi King from Mahou Sentai Magiranger.
- Monster of the Week: It's the monster the Boukengers fight in #30.
Desperado
A monster created after Gajah absorbed the contents of Pandora's Box.
- The Dragon: Created by Gajah to serve as his enforcer and muscle.
- Homage: Modeled after Ohranger Robo.
- Implacable Man: Most of the Boukengers' attacks do very little against it. It takes them hitting it with the Dual Crusher multiple times to put it down.
- Made of Evil: It's made from the evils in Pandora's Box.
- Pre-Final Boss: Fought and destroyed right before Gajah is.
Destruction God Gordom
An ancient deity which fell to Earth from space and formed the basis of the Gordom Civilization.
- Evil Is Visceral: Both the Heart of Gordom and Brain of Gordom it left behind are dangerous artifacts.
- God of Evil: Implied, given it's a "Destruction God".
- Greater-Scope Villain: Never appears in the series itself beyond a brief flashback, but it founded the Gordom Civilization and left behind several powerful artifacts, including its Heart and Brain.
- Sufficiently Advanced Aliens: Implied to be some kind of advanced alien, since it came from space and is responsible for the Lost Technology the Gordom use.
Jaryuu Clan
In General
A race of genetically engineered dragons created through Lemurian super science. They seek to wipe out humanity and claim the Earth for themselves.- Anti-Human Alliance: Their main plans for the Precious are to use them to wipe out humankind so their dragon people can take humanity's place.
- Homage: Their members are mainly modeled after the mecha of the dinosaur-themed seasons Kyōryū Sentai Zyuranger and Bakuryuu Sentai Abaranger, or dragon-themed mecha from other seasons.
- Mook Depletion: Ryuuwon's darwinistic methods of creating Jakuryuu and his weakening ability to create new Jaryuu soldiers gradually deplete his forces.
- Our Dragons Are Different: The Jaryuu are "dragons" created by Ryuuwon splicing the DNA of dinosaurs with the genetics of several other creatures to create lizard people.
- The Remnant: A pocket of Jaryuu Soldiers are shown in the epilogue to have survived Ryuuwon's defeat and still seeking to carry on his vision.
Creator King Ryuuwon of the Jaryuu Tribe | Actor: Junpei Morita
- Arch-Enemy: To Akashi, who possess a similar but also differing view on adventuring than him, and who he fights many times throughout the series.
- Bad Boss: He blows up his giant dragon robot with several Jaryuu piloting them in an attempt to kill the Boukengers. Akashi was not at all pleased by this. He also has his Jaryuu fight to the death to enhance the surviving mook into a stronger form.
- Big Bad Ensemble: One of the main antagonists alongside Gajah, Gekkou of Illusions and Gai. Of the four, Ryuuwon is the one behind the most episode plots and Akashi's personal Arch-Enemy.
- Boomerang Bigot: Hates humans, despite having formerly been one.
- Came Back Wrong: His partially decayed form in the Boukenger tribute episode of Kaizoku Sentai Gokaiger.
- Contrasting Sequel Antagonist: To Garoa and Radiguet, both being nemesis to a red ranger. Though a Fantastic Racist like Radiguet with a Redemption Rejection moment, Ryuwon is actually a Boomerang Bigot. Also, while both are similar in human form and each a Not-So-Harmless Villain despite personal setbacks and self-sabotaging moments, Ryuwon lacks Garoa's Butt-Monkey traits and does not feel threatened by rival villains.
- Dual Wielding: Wields two swords.
- The Dragon: Literally. In respect to the trope, though, he's not a straight example (seeing as he works independently), he fills several of the tropes associated with this role in Sentai: he's one of the stronger villains in combat, often takes to the battlefield himself and is the next to last villain to bite it.
- Emperor Scientist: Ryuuwon rules over the Jaryuu Clan and creates all of the dragons that populate it.
- Evil Counterpart: He's an adventurer like Akashi, but allowed his ambition to come at the expense of those around him.
- Frontline General: Leads most operations from the front and frequently battles the Boukengers.
- From a Single Cell: Following Ryuwon resurfacing afrom being blown up in Task 29, Take 47 reveals his helmet allowed him to regenerate his body.
- The Heavy: He's the most proactive and most recurring threat of the Boukengers, and the one who commands the strongest faction at the start of the series.
- Homage: His design is based on Daizyujin from Kyōryū Sentai Zyuranger.
- Humans Are the Real Monsters: His Freudian Excuse is that, after he was abandoned by his comrades he came to see all of humanity as evil.
- Maker of Monsters: All of the mooks, mecha and monsters he uses are personally made by himself.
- Monster Progenitor: Creates the Jaryuu soldiers from his own blood.
- Mook Maker: Is able to create his Jaryuu soldiers from samples of his own body, and from them. But near the end of the series, he became too weak to keep doing this and has to find a Precious to restore his power first.
- Redemption Rejection: Akashi tries to tell him that having his dreams means being human and an adventurer but Ryuuwon continuously shoves him aside as he dies from the explosion of the Precious Bank.
- Returning Big Bad: Appropriately enough, he comes back as an undead villain in the Boukenger tribute episode of Kaizoku Sentai Gokaiger.
- Shadow Archetype: Ryuuon represents a darker side of Akashi, an adventurer who suffered ridicule that compels him to seek the power out of revenge.
- Social Darwinist: Deconstructed. He has his mooks engage in all-out battle to death before transforming the surviving winner, but it ends up depleting his army and gradually weakens him everytime he creates name Jaryu to replace the ones that died. By the series finale and Kaizoku Sentai Gokaiger, the Jaryuu are nearly extinct.
- Start of Darkness: Being abandoned by his comrades is what triggered his hatred of humanity.
- Super-Empowering: The Wicked Dragons are Jaryuu Soldiers who've been empowered by Ryuuwon.
- Was Once a Man: Used to be a human, and briefly turns back into one before being killed off.
Dragonoid Soldiers Jaryuu Voiced by:Tamotsu Nishiwaki
Genetically engineered soldiers created by Ryuuwon from his own blood.
- Dragon Their Feet: Pun aside, a pocket of them outlast Ryuuwon's defeat and in the finale continue trying to loot Precious to achieve his vision.
- Elite Mooks: Compared to the Gordom's Karths, Jaryuu Soldiers are tougher and more intelligent, though this only means they last a little longer against the Boukengers.
- Homage: Modeled after Dragon Caeser.
- We Have Reserves: Deconstructed. Ryuwon's Social Darwinist methods of selecting a Jakuryuu reduces the Jaryuu's numbers until only two remained in the final episode of the series.
Wicked Dragons
The end product of Ryuuwon having a group of Jaryuu Soldiers fight each other to the death, with the survivor being mutated into a stronger unique dragon.
- Monster of the Week: They tend to serve as the villain of the week whenever it's a Jaryuu Clan episode.
- Mook Promotion: They begin as one of a group of Jaryuu Soldiers, who after fighting their comrades to the death is given a transformation into a much stronger form.
Dark Shadow
In General
A group of Japan-based ninjas-for-hire who are out to make big bucks by stealing Preciouses. Consist of Gekkou of Illusions, Shizuka of the Wind and Yaiba of Darkness.- Dual Wielding: Yaiba who can turn his two swords into a Double Weapon and Shizuka with her dual kunai.
- Homage: Appropriate given the ninja motif, their members are also based on Ninja Sentai Kakuranger mecha. Gekkou is based on Tsubasamaru, Yaiba on Muteki Shogun, and Shizuka on Kakure Daishogun.
- Ninja: Ninja thieves, at that.
- Token Good Teammate: They're called Dark Shadow, they're antagonists, but they're the least evil amongst the Negative Syndicate since Gekkou and Shizuka are not interested in causing harm to humanity unlike Gaja, Ryuuon or the Questers, they just want to make a lot of money and can be shown to be friendly to the Boukengers. Except for Yaiba. This is mainly the reason why, by the end of the series, Gekkou and Shizuka are the only 2 villains still at large, still fighting the Boukenger over the precious.
Gekkou of Illusions | Voiced by: Banjo Ginga
- Big Bad Ensemble: Joins Gajah and Ryuuwon when he appears, and is joined much later by Gai. Of the four main antagonists, Gekkou is only one to never fight himself and the only one to get away in the end.
- Corrupted Character Copy: To Tac, both teal-colored bird-like supporters of their respective groups. But Tac is a navigation robot helping a Super Sentai team while Gekko is the leader of a group that opposes a Super Sentai team.
- Demonic Possession: His method of sealing the Demon Bird required him to pull a form of this, by abandoning his own body and taking possession of the Demon Bird's to suppress its power, turning him into a normal-sized owl as a result.
- Devil in Plain Sight: When the Boukengers actually meet him, they assume he's a regular bird and don't recognize him as the leader of Dark Shadow. Justified since they haven't seen or even heard of him prior to that point.
- Even Evil Has Standards: He greatly dislikes the Demon Bird's desire to destroy the world, hence why he gave up his human form to contain it. Yaiba has to unseal the bird by force since he doesn't have any standards.
- Karma Houdini: He and Shizuka are still alive and still operating at the end of the series, though it's downplayed since they were the least evil of the villains. Then subverted in Gokaiger vs. Gavan when he and Shizuka are revealed to be Zangyack Prisoners.
- Make My Monster Grow: Gekkou is the most reliable source of this trope with his 'Oogami Henge no Jutsu.
- Non-Action Big Bad: Gekkou leads Dark Shadow but leaves the fighting to his two subordinates, as he's a bird.
- One-Winged Angel: During the only time he personally fights the Boukenger, he turns into a huge, monstrous bird; the very bird he once imprisoned using his own body (see Was Once a Man below). However, he didn't do it on his own free will: Yaiba forced him to, and Gekkou was unable to control himself in his monstrous form.
- Was Once a Man: He was once a human ninja, until he used his own body to imprison a huge bird monster called the Demon Bird, turning him into an owl as a result.
Yaiba of Darkness | Actor: Takaya Kuroda
- Arch-Enemy: Yaiba is this to Masumi, who desires to defeat him while Yaiba seeks to tempt him into embracing his inner darkness.
- Big Bad Ensemble: Temporarily joins the ensemble after backstabbing Gekkou, and even becomes the most dangerous player in it when he enacts his plan to coat the Earth in darkness.
- The Corrupter: Sees darkness inside of Masumi and wants to corrupt him into being just as twisted as he is.
- The Dark Side: Embodies it, and he's looking to get Masumi to embrace it as well.
- The Dragon: He's the deputy leader of Dark Shadow and Gekkou's main enforcer, getting sent in whenever Shizuka isn't enough to cut it.
- Dragon-in-Chief: Even though he's subordinate to Gekkou, he's the most threatening and dangerous member of Dark Shadow, eventually superceding Gekkou to join the Big Bad Ensemble proper.
- Eviler than Thou: Backstabs Gekkou and strikes down Shizuka in #44 before going off on his own.
- Evil Sounds Deep: Has a deep, subdued voice.
- The Faceless: We don't ever get to see what he really looks like under his armor. Even his "true face" is just another layer of his mask.
- Faux Affably Evil: He can act professional and soft-spoken when he talks to his superiors and Masumi when he tries corrupting the latter, but unlike his genuinely affable cohorts, he's just doing this to manipulate others into satisfy his obsession with darkness.
- Knight of Cerebus: Yaiba is the first completely no-nonsense villain we get in the series.
- Lack of Empathy: While the Ashu Tribe/Questers are much more dangerous and tougher to fight than Yaiba, they at least actually have some care for each other; Yaiba, however, cares nobody but himself, not even to the rest of Dark Shadow or Masumi, whom he repeatedly tries to corrupt and slaughtered his excavation team (Albeit abusive ones, though that's clearly not a detail Yaiba would care about), in his aspirations to obtain power, disregarding what would happen to the planet should he succeed.
- Maker of Monsters: Is able to use a special ninjitsu to transform certain objects into monsters to serve the Dark Shadow.
- Nightmare Fetishist: When Gekkou warns him of the Demon Bird's world destroying power, Yaiba can only express delight at getting to see it.
- Omnicidal Maniac: In his final episode he summons a meteor full of darkness to crash into Earth, intent on spreading its power throughout the planet at the expense of everyone else.
- The Sociopath: Apart from his straight-laced and professionally serious voice, Yaiba is very ambitious in wanting the power of darkness to the point that he unhesitatingly betrays Gekkou and Shizuka; plus him swaying Masumi to embracing his darkness doesn't mean Yaiba has actual empathy and consideration of his foe's standards, imperatively trying to force him that he cannot escape the darkness.
- The Starscream: He eventually backstabs both of his teammates to seize power, sacrificing Gekkou to awaken the Demon Bird so he can use it to destroy the Boukengers.
- Token Evil Teammate: Gekkou and Shizuka can be sympathetic and look like 'just doing their job'. But Yaiba is far more sinister and is a darkness-worshipping monster who ends up betraying the whole team for the power of darkness, and is the only main member of the team to get Killed Off for Real.
Shizuka of the Wind | Actor: Mami Yamasaki
- Bitch in Sheep's Clothing: Shizuka may be a perky, ditzy Punch-Clock Villain, but on a couple of occasions is perfectly willing to kill innocents for power.
- Dark Action Girl: She's pretty ditzy and not necessarily evil per-say, but she's still a very capable ninja who can hold her own against the Boukengers. The Rainbow Cloth in Task 38 practically takes this up a notch.
- Evil Counterpart: To Natsuki. Shizuka has her genkiness, but none of her kindness.
- Genki Girl: A villainous example.
- Karma Houdini: She, along with Gekkou, gets away in the end, though like him she wasn't really all that evil. Then subverted in Gokaiger vs. Gavan when she and Gekkou are revealed to be Zangyack Prisoners.
- Kawaiiko: To an even greater extreme than Natsuki, acting like even more of a Womanchild thna her.
- Male Gaze: The camera tends to linger on her legs when she's posing as a civilian.
- Ms. Fanservice: In her civilian disguises, which tend to show off her legs. There's also the fishnets she wears as a ninja.
- The Smurfette Principle: She's the only female villain among the Negative Syndicates.
- Took a Level in Badass: Task 38 sees her level-up massively, both in civilian form and as Super Shizuka of the Wind when she uses the Rainbow Cloth. She reverts back to her regular self at the end of the episode.
- Womanchild: Prone to petty taunts, and throwing childish tantrums whenever she's beaten.
Tsukumogami
Monsters created from combining two or more objects and imbuing them with a spirit to bring them to life.- Animate Inanimate Object: Created by imbuing an inanimate object with a soul to brin it to life.
- Monster of the Week: They're the Dark Shadow's monster force and serve as the villain of the week in most episodes where they appear.
Demon Bird
A giant bird-like demon which once terrorized Hermit's Gorge. Gekkou of Illusions took possession of his body in order to seal him.- Greater-Scope Villain: It's a threat far greater than Dark Shadow, having been sealed away by Gekkou in the past, and is said to be capable of ravaging the world.
- Homage: Based on Jet Garuda in Choujin Sentai Jetman, which is appropriate given the bird motif.
- The Juggernaut: Once it's released at full power it absolutely dominates the Boukengers in battle and shrugs off everything they throw at it.
- Minor Major Character: It's one of the most powerful evil forces in the setting and its past has ties to the origin of Dark Shadow, but it only appears in Task 44 and isn't even one of the final bosses in the endgame.
- Ominous Owl: Takes the form of a huge, demonic owl
- Sealed Evil in a Can: It's power is sealed in a shrine at Hermit's Gorge, while its soul is kept suppressed by Gekkou, who took over the Demon Bird's body in order to seal it.
- Walking Spoiler: Its true nature is linked to key details about Gekkou's past and why he inhabits a bird body.
Ashu Tribe / Questers
A group of Ashu demons out to make humans suffer and take over the human world. They were once a whole army, but only two are in the world: Rei and Gai. They were quickly defeated but came back more powerful and mechanized when Gaja gave them the Godom Engine. They quickly broke out of Gaja's services and worked on their own. They're Eiji's Arch-Enemy.
- Back from the Dead: Gai and Rei get brought back thanks to Gajah.
- Evil Is Not a Toy: Gaja revives them with the Godom Engines, but didn't actually come up with a plan to control them.
- Evil Wears Black: Both of the Questers have jet-black Powered Armor on.
- Homage: To nearly all the mecha of Gosei Sentai Dairanger. Gai is Ryuuseioh and then Dairenoh, Rei is Won Tiger and then Kiba Daioh, and Hyoga is Daimugen.
- Humongous Mecha: The Quester Robos, most of which were designed specifically to use a particular Precious.
- Knight of Cerebus: After they appear they're treated as the biggest threat in the show and tend to be the toughest to fight. Ironically they are the first to go down.
- Not Quite Dead: Their apparent status between being killed as Ashu and revived as Questers.
- Offscreen Villain Dark Matter: They get their first mecha by stealing it from Gajah. Where they get the resources to make the ones after is anyone's guess.
- The Psycho Rangers: They were made into Questers by Gajah using research on the Boukenger's Parallel Engines. Their Quester forms and Swiss-Army Weapon also look vaguely Rangerlike. And to top it off, they also use Humongous Mecha during each of their appearance, instead of going for human sized monsters that grow bigger upon defeat.
- Ungrateful Bastard: Ryuwoon, Gaja and Yaiba helped them to steal the Precious from Boukengers, but they remain ungrateful towards them and only used them as mere pawns.
- Villainous Friendship: The two main members are this to each other, staying loyal to each other, which continues even after being revived as Questers. Also Rei is none too happy when Bouken Silver kills Gai.
- Worthy Opponent: After Gai and Rei are killed, Eiji goes as far as making graves for the two of them.
Furious Demon God Gai | Actor: Kenta Miyake
- Arch-Enemy: He and Eiji share a deep history, with Gai having played a role in the death of Eiji's dad, and Eiji is dead set on defeating him.
- Big Bad Ensemble: The last of the four main antagonists to appear, although he very quickly becomes one of the Boukengers' most proactive and dangerous foes. And he ends up being the first of the villains to fall.
- Boisterous Bruiser: Gai is a villainous example, combining efficiency, bravado and Troll laugh whenever things go his way.
- Frontline General: Given how the Questers have only two members (and how we only see four evil Ashu in total) Gai frequently does the legwork for many of his schemes and goes up against the Boukengers quite a lot.
- Troll: Gai just loves screwing with his enemies and laughing in their faces.
Grand Beast Rei | Actor: Chihiro Suzuki
- The Brute: Incredibly strong and very sadistic to match.
- The Dragon: Gai's main (and only) henchman.
- Dragon Their Feet: After Gai gets defeated by Eiji, Rei lasts for around five seconds longer before being destroyed by the other Boukengers.
- Sealed Evil in a Can: Rei was trapped in a mirror, along with the rest of the Eastern Ashu, until Gai and Hyouga found a way to bring Rei back.
Hyouga | Actor: Kenji Hamada
An Ashu serving Gai in #17.- Monster of the Week: He's effectively the villain of the week for #17.
- Punny Name: His name is a homophone for hyoga, the Japanese word for "glacier", and a portmanteau of the words "hail" and "ogre" in Japanese (hyo oga).
- We Hardly Knew Ye: Lasts for just one episode before being defeated.
Ouga | Actor: Kazuki Yao
- Green-Eyed Monster: Heavily implied to have been in love with Eiji’s mother and furious she married a human.
- Manipulative Bastard: Took the form of Kei to entice Eiji to stay in the dream world and not help his comrades.
- Monster of the Week: He's the main villain of episode #40, although it takes two more episodes for Eiji to truly finish him off.
- The Psycho Rangers: Creates his own team of fake Boukengers to battle them when he first encounters them.
- Villain of Another Story: He commands a separate branch of the Ashu Tribe from Gai's, but was sealed by Eiji's ancestors in the past and only serves as an antagonist for a short period of time.
Kei | Actor: Mami Higashiyama
A member of the western Ashu Tribe who is Eiji's mother.- Cute Monster Girl: She looks human, in contrast to the males of her kind, and quite pretty.
- Light Is Good: White hair, white dress and the only heroic Ashu.
- Token Good Teammate: She's the only full-blooded Ashu we see who's good.
Time Demon God Chronos
Time Demon God Chronos | Actor: Bunkou Ogata
- Big Bad: Of GoGo Sentai Boukenger vs. Super Sentai. He's partnered with Gajah for most of it, but it's clear even then that Chronos is the greater threat.
- Faux Affably Evil: He acts unusually jovial for an evil demon, though he's still very dangerous and willing to throw his allies under the bus to achieve his goals.
- Generic Doomsday Villain: Chronos doesn't get much backstory beyond being a demon who wants to Take Over the World, though while the film was still in development as Boukenger vs. Magiranger he was a member of Hades Empire Infershia.
- High-Class Glass: Has a clock over his right eye as a monocle.
- Homage: He's based off Mirai Sentai Timeranger's Providus.
- Legion of Doom: Teams up with Gajah and resurrects Meemy, Tsuetsue and Furabiijo to help with his plan.
- One-Winged Angel: After reviving the three sorcerers he absorbs them into the Staff of the Three Philosophers to grow giant, gaining a set of golden chest armor in the process.
- Original Generation: While the other villains in the film are all past foes of the Sentai, Chronos, the Big Bad, is a completely original character.
- Red Eyes, Take Warning: The singular eye that he has visible is red.
- Time Master: With the power of the Gordom Engines given to him by Gajah, Chronos can use his hourglasses to manipulate time and bring people Back from the Dead.
- Villain Team-Up: At the start of the movie he teams up with Gajah, needing his Gordom Engines to enact his plans.
- You Have Outlived Your Usefulness: Once he has everything he needs, he casts aside Gajah and consumes the rest of his allies to assume his Super Mode.
