Characters / Sgt. Frog

The cast of the manga and anime series Keroro Gunsō/Sgt. Frog.

---

The Keroro Platoon

Sergeant Keroro

Voiced by: Kumiko Watanabe (Japanese), Todd Haberkorn (English, Funimation), Andrea Kwan (English, Animax Seasons 1-2), Sarah Hauser (English, Animax Seasons 3-4), Xavier Fagnon (French, SMI dub), Tony Beck (French, MIE dub),Eba Ojanguren (Spanish)

"Our hero", a rather hapless Alien Invader who spends more time doing chores and goofing off than he spends actually trying to invade. His plans usually take the form of Zany Schemes that blow up in his face in various amusing ways.

Despite his flaws above, Keroro has some sense of honor as a Keronian soldier, with a great deal of empathy for others in need. Thus, he will actually become more competent when trying to help someone out.

---

• Anti-Hero: The loser type, most of the time. Also an Ineffectual Sympathetic Villain and an Unsympathetic Comedy Protagonist.
• Anti-Villain: Despite technically being ordered to take over the world, Keroro would much rather play around. Likewise, he is capable of caring for others, whether it is his friends or strangers.
• Anti-Role Model: A very good example to show viewers how not to be a military leader.
• Attention Deficit... Ooh, Shiny!: He pretty much get distracted over the sight of one Gundam model or anything else unimportant. For Sarge, it's "Gundam models first, invasion plans later".
• Berserk Button:
  • Breaking his Gundam models is a sure-fire way to set him off.
  • In a more heartwarming example, he becomes upset whenever someone harms his family and friends. Best proven when aliens posing as famous reality show stars visit the house and get a bit too touchy with Natsumi and Aki in the hot spring. This is how he reacts:
  Keroro: WHAT FLAVOR IS YOUR BLOOD!?^note They won't like me when I'm angry! FROG SMASH!! in the dub.
• Beware the Silly Ones: is actually quite friendly when not scheming anything, as well as being a general goofball. However, break his Gunpla and he will threaten to destroy the planet itself.
• Big Ol' Eyebrows A flashback in episode 58 shows him with thick brows. Likely played for laughs.
• Brilliant, but Lazy: Keroro is very dexterous, but his cowardly and slothful attitude stops him from being effective unless seriously motivated.
• Bullying a Dragon:
  • His relationship with Natsumi in a nutshell, at least in earlier stories.
  • Becomes a literal example when Warrior-Style was introduced in the manga.
• Butt-Monkey: Not only does his plans for conquering Pekopon end in failure, but Keroro is also often the center of abuse, whether or not he deserves it. It can honestly get hard to watch at times.
• Character Development: Has mellowed out over the years, acting less chaotic and violent when scheming an invasion plan.
• Camp Straight: Does all the chores for the Hinata household, as well as regularly talking and dressing like a teenage girl or drag queen when making a joke. However, Keroro was clearly attracted to Pururu as kids, as well as occasional hints that he reciprocates Angol Mois' feelings on some level. In contrast, Keroro appeared creeped out when Tamama accidentally confessed his love for him at one point.
• Cowardly Lion: Whenever he isn't being a straight-up Dirty Coward. There are times when he will at least try to fight and defend his platoon himself, despite being scared. This is most evident in the movies listed below.
• Crouching Moron, Hidden Badass: Despite his usual attitude, Keroro's potential actually far exceeds elite members of the Keron Army, including his platoonmates and Garuru himself.
  • In Volume 17, he subconsciously uses the Keron Star to stop Zoruru with a single shadow-wreathed look and a stern order. Does the same thing to a KIRURU UNIT in Volume 20.
  • He kicks a lot of ass in the movies. Notable examples include: him being turned into a dragon in the fourth movie and proceeding to kick his entire platoon's dragon asses. Note that when he transformed, Keroro, like the rest of his platoon, became amnesiac and ruthless. While the audience were privy to the other platoon-turned-dragon members thoughts, we do not hear Keroro's at all.
  • In the fifth movie, Keroro is actually Makemake's chosen host against Aku-Aku, temporarily gaining god-like powers during the climax.
• Didn't Think This Through: One of Keroro's Fatal Flaws as a character, alongside his Arrogance, and slothful attitude is that he is very impulsive, willing to do anything to achieve his goals without realizing the consequences until it's too late.
• Dirty Coward: Especially when pitted against Natsumi.
• The Ditz: Wavers pretty frequently with each story.
• Ditzy Genius: Capable of learning advanced ninjutsu and creating high-tech machines within a single day, as well as proving a brilliant leader when needed.
• Dub Personality Change: Even when compared to the rest of the cast, Keroro is far meaner and idiotic in the Funimation dub. It's probably due to how a good chunk of the jokes from Keroro's dialogue and mannerisms in the original Japanese version aren't understandable for foreign viewers.
• Explosive Overclocking: Occurs if he is oversaturated with humidity, briefly unlocking the Keroro From Back Then before being Brought Down to Normal again.
• Fatal Flaw: Keroro has a ton, but his most common flaws are Arrogance, Sloth, and Impulsiveness.
• The Friend Nobody Likes: Zigzagged. While the others are annoyed at Keroro's flaws, he can also act as The Heart. Case in point, when weakened by Aku-Aku, Giroro and the others were ultimately inspired by Keroro to fight back.
• Get-Rich-Quick Scheme: Whenever an opportunity arises for him to make money, you best bet he will not let it slip away. He is constantly coming up with money-making schemes like they're going out of style.
• Harmless Villain: He's so terrible as an invader that most of his plans collapse in a few hours. For the rare times when this isn't the case, some stroke of bad luck will cause it to end.
• Hidden Depths: For all of his incompetence, Keroro is the only one who could lead his unique platoonmates. Both Tamama and Kururu proved awful leaders during their brief stint, with Giroro constantly at odds with Kururu and Dororo. Likewise, Dororo's awkward nature and Sixth Ranger status speak for itself.
  • Will bring up good points from time to time, such as noting how absurd Shurara's reason for revenge was.
• His Own Worst Enemy: Pretty obvious by this point. As Giroro puts it, Sarge is more of a danger to himself than to the planet he’s supposed to be conquering.
• Heterosexual Life-Partners: Since arriving in Pekopon, he and Fuyuki have become inseparable.
• Hoist by His Own Petard: No duh.
• Hypocrite: He calls out his friends for their flaws, when he has a ton himself. Sometimes doubles as a Hypocrite Has a Point, especially when they blame solely him for their lack of success at invading Pekopon.
• Idiot Hero: Whenever he and his platoon are being helpful to someone.
• It's All About Me: He tends to think himself highly a lot, especially in the Funimation dub.
• Irony: Is much more competent when actually helping someone, particularly against villainous foes. Could explain why he's so bad at trying to conquer planets.
• Improbable Weapon User: In many video games, he draws from his collection of toys and cleaning supplies to help him out—the vacuum is a particular favorite.
• Jerkass Has a Point: Keroro is a poor excuse for a military leader. However, he isn't exactly wrong to defend himself from his platoonmates' criticism, given how each are just as terrible at their jobs. Notably, Giroro has no real excuse whenever Keroro brings this up in an argument, simply replying with violence.
• Jerk with a Heart of Gold: Is more or less this.Less so in the Funimation dub.
• Kids Are Cruel: Keroro in his younger days was a big jerk given the number of traumas he had inflicted onto poor Dororo. When the older Keroro tries to talk things out peacefully with him, he responds by pranking him.
• Large Ham: He has quite a dramatic flair, especially in the dub.
• Lazy Bum: Frequently spends his time building Gundam models and watching cartoons, rather than conquering Pekopon like he was told.
• Loser Protagonist: He's a total Butt-Monkey, and lazy to boot.
• Lovable Coward: His antics are goofy and endearing, even when he's begging someone to save him from whatever mess created.
• Manchild: Obviously.
• Manipulative Bastard: He isn't above taking advantage of his friends, especially Dororo.
• Meta Guy: Surprisingly, Keroro will often act as this, sometimes bantering with the Narrator himself.
• Never My Fault: It's rare for Keroro to admit his own faults and the problems he causes.
• Non-Action Guy: Mostly from his timid nature. Is occasionally subverted on rare occasions.
• Otaku: Of the Gundam variety, as well as other forms of pop culture, such as anime, space bikes, and figurines.
• Ping Pong Naïveté: His overall competence varies depending on the episode, specifically how funny he needs to be at the moment.
• Plucky Comic Relief: Very energetic and fun-loving, especially when playing around with his friends. Will also reference pop culture regularly.
• Pet the Dog: One of the reasons why Keroro's friends care about him, in spite of his negative traits. Most prominently shown toward Fuyuki or with Angol Mois, but is extended to others, including complete strangers.
  • In the Garuru platoon arc, he specifically asks Garuru to spare the Hinata family when it looks like the Garuru platoon have won.
  • When ordered by his superiors to hand Mashu over for termination, Keroro adamantly refused, even at the behest of Giroro and Dororo. This would ultimately reward him.
  • One story features him befriending a little girl who becomes fascinated with his hat. When it appears she has lost it, he lets her know that he is grateful for her trying to find it anyway.
• The Scapegoat: It's clear that Keroro and his platoonmates are terrible as invaders. However, the Keron Army is hardly any better, since they expect just 5 soldiers to conquer an entire planet; one filled with rival aliens. Yet, Keroro is the only one ever blamed for the overall situation.
  • Even more, there are instances when Keroro is blamed for things outside of his control, such as the destruction caused by Shurara's extremely petty vendetta.
• Signature Laugh: "Gerogerogero!"
• Smug Snake: Keroro often boasts himself as a 'great leader', which is rarely ever proven in-series.
• Too Dumb to Live: A lot of times.
• Trademark Favorite Food: Star fruits, Justified as it 'saved' him in one chapter. It Makes Sense in Context. The Funimation dub exaggerates his love of hamburgers (or "cow flesh").
• Transformation Trinket: The Keron Star, which lets him transform into a pre-peace treaty weapon called Warrior Style.
• Unsympathetic Comedy Protagonist: When acting lazy or selfish. This is especially true in the Funimation dub.
• Verbal Tic: Frequently ends his sentences with "...de arimasu!".
• Villain Protagonist: Largely a Harmless Villain, of course. Subverted in his Pet the Dog moments.
• Vitriolic Best Buds: Has this with almost everyone, but especially with Giroro. That being said, Keroro does actually cherish his friends, with the feeling being mutual.
• Weaksauce Weakness: Banana peels. He's compelled to step and slip on them.
• With Friends Like These...: In his worst moments, Keroro can be this.
• Why Did It Have to Be Snakes?: The Nyororo, large dogs, and Banana Lizards(Though the last one is for a different reason entirely).

Private Tamama

Voiced by: Etsuko Kozakura (Japanese), Brina Palencia (English, Funimation), Alice Beaver (English, Animax), Chantal Macé (French, SMI dub), Ionna Gkizas (French, MIE dub), Pilar Ferrero (Spanish)

The team's youngest member, made obvious by the fact he's still got tadpole features. Despite his cuteness, he's got a Hair-Trigger Temper, a massive jealous streak, and likes firing his laser when provoked. Also, he loves Keroro.

---

• All Love Is Unrequited: Keroro is normally blissfully ignorant about his feelings.
• Badass Adorable: He's got shiny eyes and Blush Stickers, but he is capable of sending people flying with his Breath Weapon.
• Bare-Fisted Monk: His primary fighting style aside from Blowing Stuff Up.
• Berserk Button: He's got a few, but people acting lovey-dovey towards Keroro is a big one.
• Big Eater: He's shown to eat snacks. Tamama likes to eat junk food and sweets the most. Especially candy, cake, soft drinks and potato chips.
• Blush Stickers: He has three little pink lines on his face that imply this trope. They vanish when he gets angry, though.
• Breath Weapon: What the Tamama Impact is.
• Brutal Honesty: Uses this on Karara to dissuade her crush... though he doesn't realize that's what he's doing.
• Crazy Jealous Guy: He really doesn't like anyone else getting too close to Keroro.
• Cute and Psycho: He's the youngest, most excitable member of the platoon. He's also an unstable yandere who will use his breath attack on anyone who pushes him too far or who he thinks is hitting on Keroro.
• Deliberately Cute Child: Well, not quite a child. He still plays up how cute he is, but the mask slips through sometimes.
• Don't You Dare Pity Me!: Goes through this with Mois a couple times.
• Energy Ball: His jealousy ball.
• Fair-Weather Mentor: Towards Taruru. Loves the way Taruru strokes his ego, hates his overwhelming cheerfulness and naivete.
• Feet of Clay: Gradually grows disenchanted with Keroro, especially in the manga. Still, he admires Keroro whenever the latter does something well.
• Gonk: Most of the time, he's a cute frog alien with big shiny eyes. Whenever he's significantly ticked off, his expressions become grotesquely exaggerated and contorted with rage.
• Green-Eyed Monster: Jealousy is even his main Fatal Flaw.
• Hair-Trigger Temper: Has quite an explosive one that will be set off with unpleasant results if anyone or anything dares get between him and Keroro.
• Hate at First Sight: In the third movie, he instantly hates Shivava because of his pompous attitude.
• Ignored Enamored Underling: He has a very obvious crush on Keroro. Unfortunately for him, his boss is as oblivious as he is incompetent.
• Kawaiiko: Deliberately plays up his cute image.
• Killer Rabbit: He's an adorable tadople, but if you make him mad, you'll get a face full of his Breath Weapon.
• Love Makes You Crazy: Not like he wasn't crazy to begin with, but getting too close with his sergeant is one of the ways to make him mad.
• The Nicknamer: Calls Momoka "Momochi", Natsumi "Natchi", Fuyuki "Fucchi", and Mois "that woman". This is less of the case in the Funimation dub.
• Not Allowed to Grow Up: Possibly Invoked when he sees that his childhood friend and fanboy Taruru has hit puberty ahead of him.
• Pet the Dog: So long as it does not involve competing with Keroro's affection, Tamama is actually pretty nice.
• Ping Pong Naïveté: How oblivious he is varies depending on the episode, or by how funny it would be.
• Professional Butt-Kisser: Self-described in the dub as Keroro's number-one Yes-Man.
• Sweet Tooth: He loves snacks.
• Tyrant Takes the Helm: One episode involves him being instated as the new sergeant. He quickly rises to being a massive tyrant, throwing people into pits just for displeasing him. In the Funimation dub, he even refers to himself as a führer, if the allusions weren't obvious enough.
• Verbal Tic: Japan-only: "Desu!"
• Wide Eyes and Shrunken Irises: Frequently happens when he drops his cute façade.
• Why Can't I Hate You?: He views Angol Mois as his greatest competition for Keroro's affections, but does show some care for her. More prominent in later stories, where he has softened his jealousy.
• Yandere: Far worse than Momoka, as he tends to go straight for the hypotenuse-chopping option when he can.

Corporal Giroro

Voiced by: Joji Nakata (Japanese, adult), Akiko Hiramatsu (Japanese, child), Christopher Sabat (English, Funimation), Scott Evans (English, Animax), Pascal Renwick (French, SMI dub), Arnaud Léonard (French, MIE dub), Víctor Prieto (Spanish)

Keroro's Lancer. Suspects that he's the only one actually taking the invasion seriously anymore. Hopelessly crushing on Natsumi ever since she beat him up during their first fight.

---

• All Love Is Unrequited: Natsumi doesn't seem to be aware of his crush.
• Amazon Chaser: He is attracted to Natsumi due to her fiery personality.
• Berserk Button: Anything that threatens Natsumi.
• The Big Guy: Out of the five frogs, he fits this the most, being a tough, combative character with a lot of firepower and a gruff personality who is also very loyal to The Hero. Indeed, the narrative treats him as such whenever it is needed or if it is down to a team of three. However, he is almost never the strongest physical fighter in the team, barring certain moments.

• Blood Knight: He pretty much lives for war and battle. This is exaggerated more in the Funimation dub.
• Boisterous Weakling: Zig-zagged. He's an elite soldier, but also the target of countless humiliations. It really depends on whether the episode's script wants to laugh at him or along with him.
• Brutal Honesty: It overlaps with Hypocrite Has a Point. Giroro is not afraid of talking to Sarge about how he really feels about him.
• Butt-Monkey: Mainly Kururu's.
• Bystander Syndrome: Claims that he is not responsible for Dororo's traumatic past as kids, since he was "just watching" it happen. However, there are instances when Giroro actually did wrong Dororo, if scarce compared to Keroro.
• Cannot Spit It Out: His affections towards Natsumi remain unknown to her.
• Can't Hold His Liquor: He passes out from a few drops of them.
• The Comically Serious: He's basically the only frog in the platoon who insists to be professional, but it naturally only leads to comical situations due to the craziness that surrounds him.
• Crazy Jealous Guy: Has his moments. In the manga, became so intensely jealous of Koyuki after she first arrived that he attempted to Murder the Hypotenuse. Lampshaded by Tamama's gloating thoughts about finally understanding the Corporal.
• Deadpan Snarker: This is especially the case in the Funimation dub, mainly towards Keroro.
  Keroro: Are we all in heaven?
  Giroro: Not if I'm with you, we're not.
• Enraged by Idiocy: Especially when it comes to Keroro, which is emphasized more in the Funimation dub.
• Expressive Hat: The skull on his hat.
• Good Scars, Evil Scars: He has a massive scar over his eye.
• Gratuitous English: Sometimes his battle cries veer into this. Including, at one point: "This! Is! SPARTA!"
• Green-Eyed Monster: Gets this way over Natsumi from time to time.
• Guns Akimbo: Mostly seen wielding a machine gun and a Hand Cannon. Dual-wielded if the situation calls for it.
• High-Pressure Blood: Early on in the manga, he tended to bleed profusely when experiencing such intense emotions. That particular quirk seems to have fallen by the wayside.
• High-Pressure Emotion: Again, commonly set off by Natsumi. In several instances, just sitting around brooding causes him to emit such an intense heat that the others notice and complain/comment on it.
• Honor Before Reason: When the crew thought Fuyuki may have been killed underwater he insisted that they go back to rescue him or at least recover his body, in spite of innumerable enemies waiting for them.
• Hyperspace Arsenal: Can access his weaponry at any time thanks to Keronian technology.
• Hypocrite: Constantly berates Keroro and others for their incompetence, despite personally causing several invasion plans to fail as well. Even the narrator notes this at one point.
• Informed Ability: His official sobriquet of being "The Most Dangerous Man in the Universe" became a gross hyperbole after just some episodes, if not in the very episode he was introduced.
• Jerk with a Heart of Gold: This side of him is mostly shown to his cat and Natsumi, but he has his moments with the platoon as well.
• Let's Get Dangerous!: When the situation turns serious, he's usually as proficent in combat as he looks, as long as he isn't fighting a hopeless enemy.
• Love at First Punch: He met Natsumi as he was trying to take over the Hinata house. She punched him so hard that his eyes were spinning in his head. Giroro fell in love with her as he fell to the floor.
• Love Makes You Crazy: He doesn't seem to be careful about himself...
• Mars Needs Women: He has a very blatant crush on Natsumi.
• Murder the Hypotenuse: In the manga, he attempted this on Koyuki right after her introduction.
• Number Two: In many ways: he is Keroro's closest friend (as well as the most involved with the invasion after him) and almost as strong as Dororo.
• Only Sane Man: At times, especially when the others are goofing off.
• Perpetual Frowner: His face is almost always in a frown. He does smile from time to time.
• Pet the Dog: Or cat, in this case. Mostly focused around his pet cat and Natsumi. However, he has his moments with Fuyuki, Keroro, and the rest of the platoon.
• Primal Fear: He's terrified of ghosts.
• "The Reason You Suck" Speech: Gives one to Keroro in the dub of episode 15.
• Stay in the Kitchen: Part of his tsun-tsun act in the manga involves him making comments along these lines to Natsumi.
• Strong as They Need to Be: In some episodes, he's capable of rivaling Dororo; in others, he's a military clown.
• Terrible Artist: During the Amateur Film-Making Plot episode, it's shown that it took him 3 hours to draw one picture. Said picture resembles that of a child's scribble.
• Tsundere: He's rude and hot-headed, but he does have a soft side towards those he cares about.
• Tsurime Eyes: He does have noticeably pointy eyes...
• The Worf Effect: Despite being the hard-boiled soldier who has a considerable reputation for martial prowess (or rather because that), Giroro often gets incapacitated by the current threat of the chapter/episode. This tends to occur before he could even fire a single bullet.
• Vitriolic Best Buds: Especially with Keroro. Can happen with Dororo as well, whenever Giroro is annoyed by his pacifism.

Sergeant Major Kururu

Voiced by: Takehito Koyasu (Japanese), Chuck Huber (English), Geoffrey Vigier (French, SMI dub), Pierre Bodson (French, MIE dub), Juan Martín Goirizelaia (Spanish)

The team's intelligence officer. Incredibly smug and self-satisfied, Kururu is constantly inventing all sorts of weird stuff, but few of these are actually meant to help the invasion... they're just for his own amusement. Loves giving Keroro just enough rope to hang himself, over and over and over again.

Much meaner in the anime, taking out many Pet the Dog moments. They EXIST, just not as much.

---

• Adaptational Jerkass: While he's always an asshole, the anime makes him more of one by removing many of his more sympathetic moments.
• Almighty Janitor: Subverted. Aside from being a technology wizard who can do almost everything, he is the highest ranked in the platoon, but Keroro is the commander instead of him.
• Brilliant, but Lazy: His inventions and machines are truly terrifying and might be a force to fear if he employed them seriously and not only to satisfy his weird whims. In fact, if he isn't amused by what's going on, it requires either cash payment or physical coercion to make him actually expend effort for anything.
• Creepy Monotone: Excitement makes his voice rise. This makes him even creepier.
• Depraved Dentist: Do not let him anywhere near your teeth. When Keroro's mouth gets invaded by cavity causing aliens, he takes great pleasure in the pain he causes him while looking at his teeth.
• Evil Laugh: KU KU KU KU KUUU...!
• Face Framed in Shadow: He perpetually has a shadow cast over the middle of his face, regardless of the actual lighting.
• Four Eyes, Zero Soul: Four eyes, and a terrifyingly sadistic personality.
• The Friend Nobody Likes: Admittedly, this is because he enjoys torturing them.
• Handy Remote Control: Always seems to have one around.
• Hidden Heart of Gold:
  • More obvious in the manga, where he has several moments showing that for all his Jerkassery, he really does care about the rest of his team.
  • A notable moment of this in the anime is when he saves fellow Wave buddy Saburo (spending the month's entire invasion budget in the process) without hesitation.
• Homoerotic Subtext: Deliberately invokes this with Giroro in the anime. Whether he's doing this just to screw with his head or out of some incredibly warped actual affection...
• The Hyena: Frequently begins a sentence by laughing.
• Hypercompetent Sidekick: Despite being the highest ranking soldier in the platoon, he's perfectly happy being this.
• I Just Want to Have Friends: During the Funimation dub anime New Year's Special he off-handedly mentions at one point he just wants to be loved.
• Insufferable Genius: He makes a point to rub in how smart he is to everyone's faces.
• It Amused Me/For the Evulz: The reason why he likes torturing his teammates/everyone else.
• Jerkass: Oh boy, he's probably the biggest one on the show.
• Mad Scientist: Well, it's more like mad roboticist.
• Nerd Glasses: Wears these, swirly eyes and all.
• No Celebrities Were Harmed: In the Funimation Dub, his voice is an imitation of Ed Wynn's.
• Odd Friendship: With 'Wavelength Buddy' Mutsumi. They aren't even shown interacting all that much, but they seem to be very buddy-buddy. To a lesser extent, Kururu mistreats Keroro less compared to how he treats the rest of the platoon.
• Omnidisciplinary Scientist: Kululu singlehandedly functions as the go-to frog for any kind of invention. Medical science is the only exception compared to official medics like Pururu, although he is by no means unskilled at it.
• O.O.C. Is Serious Business: If Kururu stops making cracks in any way, you know the situation is really bad.
  • Evidently, in the 5th movie, even he was stunned into silence when it seemed like Aku-Aku killed Keroro, only speaking once Rana explained that he was still alive.
• Pet the Dog:
  • At times, actually shows signs of caring for others. One episode involved an actual puppy, complete with Natsumi and Fuyuki freaking out over what he might do to the poor thing, when he was simply petting it for real.
  • A good example of the anime Flanderizing his character is their removal of two of his key moments during the Garuru Platoon's introduction: encouraging Keroro to keep resisting after losing contact with the others and opening a trap door underneath Keroro to force him to escape while he attempts to hold off Garuru armed with only his headphones. By contrast, Anime!Kururu simply retreats into his Hacker Cave, letting Keroro think he's abandoned him.
• Sadist: Especially in the dub. The sergeant major enthusiastically delights in inflicting pain on others. It's one of the big reasons everyone is kind of terrified of him.
• Saying Sound Effects Out Loud: Likes to announce when he presses the buttons on his latest inventions.
• Scary Shiny Glasses: If you see him do this, it's already too late.
• The Scrappy: In-universe; The Keroro Platoon are huge celebrities on Keron, except for Dororo (who nobody seems to know about) and Kululu (who is actively despised).
• Secret-Keeper: For 623 in the anime. When Giroro finds out that Saburo is 623 and confronts Kululu about it, the latter erases his memory about it.
• Signature Laugh: Kukuku...
• The Smart Guy: He's in task of most intellectual or technical matters.
• Spell My Name With An S: Kururu/Kululu. The English translation of the manga actually switched from Kururu to Kululu around Volume 10 or so, then switched back later on.
• Stalker with a Crush: Maybe towards Aki.
• Token Evil Teammate: While all of the platoon members are technically 'villains', he still fits, being the most sadistic of them all.
• Too Kinky to Torture: This is more of the case in the Funimation dub. When Fuyuki and Natsumi start beating him for tricking them into thinking he was being nice he says it was so worth the punishment he received and is upset when they stop hitting him.
• Transformation Ray: One of his favorite gadgets to build.
• Trickster Mentor: Certainly isn't above manipulating the others into self-improvement.
• Troll: He seems to go out of his way to annoy everybody around him.
• Verbal Tic: In the Japanese dub, it's "Da ze".

Lance Corporal Dororo, né Zeroro

Voiced by: Takeshi Kusao (Japanese), J. Michael Tatum (English, Funimation), David Lee McKinney (English, Animax), Pascal Nowak (French, SMI dub) Pierre Lognay (French, MIE dub), Alberto Escobal García (Spanish)

The team's token Ninja. Used to be a painfully shy, sickly child, and so clung rather desperately to his friendship with Keroro... something Keroro shamelessly exploited, leaving him traumatized to the point that any reminder of these abuses triggers his 'Trauma Switch' and sends him into the nearest corner. Grew up to become an assassin, then got separated from the others on Earth and found acceptance and peace with a group of ninjas, leading to him changing his name and outlook on life.

---

• Antiquated Linguistics: See below.
• Beware the Nice Ones: That cute little tadpole became an assassin. Then a ninja.
• Big Damn Heroes: A specialty of his.
• Big Fancy House: Lived in one as a child.
• Blue with Shock: Trauma Switch, on!
• Break the Cutie: Played for Laughs during his childhood.
• Corner of Woe: He frequently is seen in there when he's made upset.
• Extreme Doormat: Keroro treated him horribly when they were little, and Zeroro still stuck by his side. Is still susceptible to this as adults, especially in the anime.
• Failed a Spot Check: Often on the other end of this, with others forgetting about him or failing to note his presence.
• Flanderization: Is typically calm and collected in the manga, although he has his moments. In the anime...
• Flowery Feudal Japanese: In the original language, he speaks in an archaic form of Japanese, using "Sessha" as his preferred pronoun and ending his sentences with the highly archaic "de gozaru."
• Good Is Not Dumb: Is considered the Token Good Teammate in universe and is credulous when concerning friendship, but not dumb at all. In the manga he is able to beat Mutsumi(who has an IQ of 350+) in a shogi game, and in volume 20 Kururu specifically asks for his help in mechanics. In the anime that is downplay for some reason but he is still shown as highly observant, rational and knowledgeable.
• Heroic BSoD: Goes into these regularly. Shows up far less often in the manga.
• Honor Before Reason. Dororo has his moments, such as voicing reluctance to use the Keroro robots against Robobo, despite its obvious threat for everyone. Crosses over with Skewed Priorities.
• Informed Ability: He's regularly implied as the best combatant in the platoon. However, Giroro has occasionally matched him, as did Keroro once in a three-way battle. Dororo is no joke as a fighter, but he is less impressive than the narrative states.
• I Want My Beloved to Be Happy: When Koyuki had her ninja skills/memories sealed away, he was willing to let her live a happy, normal life, even though she could no longer see him.
• Lightning Bruiser: He is fast and stealthy like the ninja he is and can also perform very powerful energy techniques.
• My Hero, Zero: At least until he took a new name for himself.
• My Kung-Fu Is Stronger Than Yours: Dororo having trained as a ninja on Earth gives him a valuable edge against Keron-trained Assassins, matching Zoruru toe-to-toe.
• Nature Lover: His favorite hobbies include training deep in forests and admiring flowers. His first idea for the invasion is to fill the city with them to conquer pekopon via peace.
• New Powers as the Plot Demands: The manga doesn't spotlight him very often, so it's not unusual for him to abruptly show up and whip out a new Assassin Art or Ninja Art and bail the others out.
• Never My Fault. Has shades of this. True, his friends shouldn't have forgotten about him after arriving onto Pekopon. However, unlike Giroro or Kururu, Dororo never even attempted to reunite with Keroro, despite knowing where he is. Considering that they are on an alien planet, Dororo normally wouldn't have the luxury to wait for his friends.
• Nice Guy: Despite him having Trauma Switches during the flashbacks to his childhood, he's actually one of the nicest characters in the show.
• No Mouth: Always shown wearing a ninja, assassin or medical mask.
• Not So Above It All: Apparently expects regular payment from Keroro, despite being the main reason why their platoon can't conquer Pekopon.
• Ping Pong Naïveté: In the anime, he often winds up asking "Keroro, are we really friends...?", with predictable results.
• Powered Armor: The H-to-H Assassin suit (which bears more than a passing resemblance to Zoruru's enhancements...)
• Secretly Selfish: Very rarely, Dororo can be this, if directed solely towards his platoonmates. In one notable instance, he initially refused to save them from Geriri's actions. Sure, circumstances led to a harsh parting, but considering how Keroro and the others would have DIED, Dororo clearly went too far. Thankfully, Koyuki's What the Hell, Hero? speech helped Dororo rethink his decision.
• Sixth Ranger: Not supposed to be this, as he was always a member of the team, but the others tend to forget he exists so he comes off as this, with Angol Mois arguably being a more prominent member.
• Technical Pacifist: Never wants to hurt others but often fights to protect others.
• Token Good Teammate: Will never condone harming innocent humans in any manner.
• Trauma Conga Line: The anime just loves playing this for laughs, especially during flashbacks to the frogs' childhood.
• The Unfavorite: Played for laughs, mostly caused by Dororo's inability to read the atmosphere. Extends to his portrayal within Keron Force media (such as being seated behind a plant during a news conference), although still more loved than Kururu.
• Windmill Crusader: At least in the anime, where Koyuki is about the only one who sympathizes with his idealism.
• With Friends Like These...: Especially in the Funimation dub. In Dororo's debut, Fuyuki and Tamama both lampshade it.

(Shin) Keroro/New Keroro/Keroro- 2

Voiced by: Aoi Yūki

The youngest member and the sole member of the second Keroro platoon. Excitable and naive newcomer. Also the sole soldier within the Keron Army after 100 years.

---

• Superpower Lottery: The Keron Star grants him modes based off each platoon member's preferred method of combat.

The Hinatas

Fuyuki Hinata

Voiced by: Tomoko Kawakami (Japanese [Eps. 1-231]), Houko Kuwashima (Japanese [Ep. 232 onwards]), Leah Clark (English, Funimation), Candice Moore (English, Animax), and Josu Cubero (Spanish)

A timid Nice Guy who loves the occult. Very introverted, but he's compassionate and polite, and very inquisitive about the world at its weirdest.

---

• Agent Mulder: He is very excited about the paranormal, compared to Natsumi.
• All-Loving Hero: Doesn't seem to have a bad bone in his body and is almost ridiculously forgiving of others. More apparent in the anime.
• Beware the Nice Ones: When he snaps, all we get to see is his Battle Aura and shadowed eyes — never what he actually does. Even Natsumi is absolutely terrified of pushing Fuyuki too far, and Keroro, normally somewhat made of iron, was reduced to a stammering, terrified mess at whatever he did to him the first time this happened...
• Big Brother Mentor: Has a shade of this towards Tomosu in the manga.
• Book Dumb: Does poorly in school, but is clearly one of the smartest characters in the show.
• Chubby Chaser: Doesn't seem to be one, but Keroro teases him about a former crush of his having gained weight. Though, from what was seen of her, she was of a very normal weight.
• Clueless Chick-Magnet: If it's female, and weird (weird as in a schizo billion-heiress, an Emotionless Girl with a shape-shifting space entity on her head, and a mermaid) there's a huge chance they will have a thing for him. He may not have an extensive fanclub like Natsumi, but at least four girls have crush on him. Only half of said girls are human and he doesn't know of any of their feelings at all.
• Extreme Doormat: Until you push him too far.
• Friend to All Living Things: Whether they be human, alien, or monster.
• The Heart: Keroro's walking conscience who always tries to resolve things peacefully.
• Heterosexual Life-Partners: He and Keroro are inseparable. It's implied that Keroro was the first friend Fuyuki ever had.
• Idiot Hair: A little blue one sticks out of the top of his head.
• Masculine Girl, Feminine Boy: Feminine boy to... just about every girl he knows, really, but it's most pronounced with Natsumi.
• Morality Pet: He's this along with Angol Mois, since he's usually the one who guilt trips the sergeant to reconsidering whenever he takes a plan for invasion too far.
• Nice Guy: Just don't push his buttons too far...
• Non-Action Guy: He has a tendency to sit back and watch events unfold.
• Oblivious to Love: Despite all of Momoka's Stalker with a Crush and Yandere tendencies, Fuyuki remains none the wiser to her affections, though it has been implied on a few occasions that he's perfectly aware.
• Red Oni, Blue Oni: Surprisingly, the red to Tomosu's blue in the 2014 anime. Justified since Fuyuki is much younger in this version. In the original anime he's the blue to his older, more easily angered sister's red.
• Strong Family Resemblance: To his mother.
• This Loser Is You: His social unpopularity and lack of skills is supposed to represent us, but he makes up for by sheer kindness and willing to help others. The Funimation dub really exaggerates this, although he doesn't seem overly bothered by it.
• Uncatty Resemblance: While it's not immediately obvious, he and Keroro are both outcasts in their societies who are more interested in hobbies considered weird by their species (manga and anime for Keroro, the occult for Fuyuki) than their actual jobs. They also both tend to get kicked around a lot.
• Weirdness Magnet: More supernatural things have happened to him than any of the other cast. Unusually for this trope, he loves it this way. Natsumi, not so much... To the point it's why Alisa first interacts with him.

Natsumi Hinata

Voiced by: Chiwa Saitō (Japanese), Cherami Leigh (English), Alazne Erdozia (Spanish)

Fuyuki's tomboyish older sister, she considers herself—correctly—to be the first line of defense against Keroro's taking over the planet. Has a massive crush on Mutsumi, and is good friends with Koyuki.

---

• Academic Athlete: She excels at both her school work and at sports, despite having little to no interest in the latter.
• Action Girl: The platoon and even the Keron Army are awed by her prowess.
• All Love Is Unrequited: Hopelessly crushes on Mutsumi, while getting crushed on by Giroro, Koyuki, several of her female classmates...
• Anti-Hero: Type 2. She's protecting the Earth, even if she's a violent, anti-social brute. In fairness, the aliens she protects Earth from do cause a lot of trouble, and Natsumi herself tones down the violence over time.
• Agent Scully: Compared to her brother, she usually doesn't succumb to the idea of extraterrestrial happenings that easily.
• Aw, Look! They Really Do Love Each Other: When Keroro goes missing because his space scooter breaks down in the middle of nowhere she volunteers to go find him. She responds to any accusations of care by saying she's just trying to avoid the attention if he gets found but she gives a warm smile when she finally gets him back.
• Badass Adorable: She's a cute, young teenager who just happens to be able to perform super human feats in the name of stopping Keroro's (half-assed) attempts at world domination.
• Badass Normal: She somehow beat Giroro's web of booby traps armed with nothing but a stalk of leek during their first encounter.
• Big Sister Instinct: Gets riled up when Keroro's shenanigans threaten to being harm to her little brother, such as when he teleports him to parts unknown while they're playing a life-sized board game.
• Can't Live with Them, Can't Live Without Them: Her relationship with Keroro in general.
• Charles Atlas Superpower: Is SOMEHOW able to keep up with other supernatural threats.
• Deadpan Snarker: She’s more of this in the dub, but the original version has her fair share of snark.
• Defrosting Ice Queen: She may still be suspicious of the Keronians in general, but she warms up to them overtime. She even more or less stops picking on Keroro so frequently.
• Disappeared Dad: Her father travels the world and is rarely home. He only appears in person in episode 357.
• The Dreaded: The Keroro Platoon are all are utterly horrified of Natsumi's wrath, and at least try not to upset her too much.
• Even the Girls Want Her: Has a considerable all-female fanclub at school, to the point that she received two shopping bags worth of chocolate for Valentine's Day one year.
• Girlish Pigtails: An interesting example. While they stay the same length throughout the manga, in the anime, they get shorter and shorter with each passing season until she practically has Boyish Short Hair in the final season.
• Good is Not Nice: She's not the nicest person around, but she keeps the Keroro Platoon in check. At times, her attitude towards Keroro border onto viciously cruel and sadistic, even when it's clearly unwarranted. To be fair, he can be a jerk, especially in earlier stories.
• Hidden Eyes: If she has these, it's a sure sign of trouble brewing for Keroro or someone else.
• Improbable Weapon User: Uses a leek to deflect bomb blasts. She also shielded herself with a school bag from Giroro's missiles. It's as ridiculous as it sounds.
• Jerkass/Jerk with a Heart of Gold: Wavers between back and forth, although the former is her more common side at first.
• Jerkass Has a Point: She's violent and mean towards Keroro, even when he doesn't mean harm. That said, he does cause trouble a lot.
• Karma Houdini: Unlike Keroro, she will almost never be punished for mistreating him or his platoonmates.
• Karma Houdini Warranty: At times though, her luck will run out, if very scarce. In one episode, Keroro loses his voice, causing him to suffer from Natsumi and the others' antics. He ultimately gets back at them.
• Knuckle Cracking: When those knuckles start cracking, a beating is about to ensue.
• Powered Armor: Her Powered 723 suit.
• Masculine Girl, Feminine Boy: Masculine girl to Fuyuki's feminine boy.
• Red Baron: According to Fuyuki in the manga, her overprotective streak during elementary school earned her the nickname Devil Summer.
• Red Oni, Blue Oni: She takes things in a very excited manner, unlike her more collected younger brother.
• Pseudo-Romantic Friendship: Goes on dates with Koyuki, as friends, although it may not be entirely platonic on Koyuki's part (at least in the anime; in the manga, it isn't platonic on Koyuki's part at all).
• Rose-Haired Sweetie: As long as you're not Keroro, or up to some supernatural mischief, she's a pretty sweet friend to have, particularly to Koyuki.
• Shorttank: What she wears in the summer-time.
• Sibling Yin-Yang: She's assertive and loves sports, while her brother is withdrawn and nerdy.
• Tomboy with a Girly Streak: She's quite the tomboy, but also has traditionally feminine interests such as shopping and cooking. She's also quite the romantic.
• Took a Level in Kindness: Has eased up on her alien friends.
• Trademark Favorite Food: Seems to be sweet-potatoes.
• Tsundere: A vicious Type A on par with the likes of Louise.
• Uncatty Resemblance: She is very temperamental, sharing this trait with Giroro.
• Wardrobe Malfunction: Every spin with Kururu's age-ray in the manga ends with her being half (or totally) naked one way or the other.
• Why Did It Have to Be Snakes?: Slugs or anything wet and slimy in general.

Aki Hinata

Voiced by: Akiko Hiramatsu (Japanese), Jamie Marchi (English, Funimation), Candice Moore (English, Animax), Vanina Pradier (French, SMI dub), Marcha Van Boven (French, MIE dub), Ana Begoña Eguileor (Spanish)

A famous manga editor. Very self-confident and cheerful. She loves "Kero-chan" and his friends, but is usually away from home working.

---

• Action Mom: She's a mother of two, and is always doing bizarre action feats to protect her children.
• Adaptational Curves: Inverted; her breasts are somewhat smaller in the anime than they were in the manga.
• Badass Adorable: On everyone's don't-screw-with list as she capable of defeating almost any hostiles without breaking a sweat, despite that she's just a cheerful mother otherwise.
• Beware the Nice Ones: She's sweet and motherly, but everyone knows not to screw with her.
• Big-Breast Pride: She enjoys being younger for a day when zapped with Kururu's de-aging ray gun but when she's turned back she comments that she missed her regular buxom figure.
• Buxom Beauty Standard: She has a voluptuous bust that easily attracts men.
• Dude Magnet: Her male co-workers are after fawning after her.
• Girlish Pigtails: You know it's summertime when Aki wears her hair like this instead.
• Hair Antennae: A few stray strands of hair stick out of her hair.
• Mama Bear: In Momoka's simulator she responds to what she thinks is an alien chasing Fuyuki by getting on her motorcycle and grinding the spinning wheel into its face.
• Ms. Fanservice: Frequently a subject of this, being one of the few (human) adults in the cast.
• Nice Girl: She is kind and motherly.
• Parental Substitute: She is very fond of Keroro, even referring to him as a member of the family. Keroro even refers to her as "Mama-dono".
• Statuesque Stunner: She's one of the taller characters in the show, being an adult and all and is considered very attractive.
• Strong Family Resemblance: Aside from her feminine features, her teenage self is essentially female Fuyuki with glasses. This is lampshaded in the dub by the narrator.
• Why Did It Have to Be Snakes?: She is terrified of animals and doesn't let her children to have one.

Akina Hinata

Voiced by: Hisako Kyoda (Japanese, old), Akiko Hiramatsu (Japanese, young), Linda Leonard (English, Funimation), Gloria Ansell (English, Animax), Nuria Marín Picó (Spanish)

Aki's mother, and Fuyuki and Natsumi's grandma. A wise old woman who lives out in the country. Considered and revered by Keroro Platoon as the top-ranking "officer" in the Hinata clan, above Aki.

---

• Cool Old Lady: In her first appearance, she single-handedly saves Keroro, Giroro and Tamama from being lost in the forest and guides them back home.
• I Was Quite the Looker: She's revealed to look like Aki back when she was young.
• Miniature Senior Citizens: Fairly old, fairly short.
• Strong Family Resemblance: As shown during the episode where Dororo stumbles into the past, she was a dead ringer for a teenage Aki.

Close Pekoponian Friends

Momoka Nishizawa

Voiced by: Haruna Ikezawa (Japanese), Monica Rial (English, Funimation), Andrea Kwan (English, Animax), Sapir Darmon (Hebrew), Debora Magnaghi (Italian), Nuria Marín Picó (Spanish)

Heir to a multi-billion-dollar international corporation, Momoka seems sweet and innocent at first, but has a hidden dark side related to her obsessive crush on Fuyuki. Spends tons of money on various Zany Schemes that she hopes will help her get closer to him, with little success.

---

• A-Cup Angst: She couldn't help but be annoyed when she saw Natsumi and Aki (who both have better bodies) in bikinis.
• Action Girl: Given the proper motivation, yes.
• Berserk Button: Stay away from Fuyuki unless you enjoy getting in a Curb-Stomp Battle.
• Cannot Spit It Out: Momoka suffers greatly from this.
• Character Development: In the manga, she has been steadily outgrowing her original Yandere tendencies, even developing a friendly rivalry with Alisa.
• The Chessmaster: One manga chapter had her father try to force her into another private school, causing Fuyuki and the others to stand up to him. The end reveals that Dark Momoka planned the whole thing. She told her dad that she wanted to go to a private school so he could meet and gain respect for Fuyuki.
• Clingy Jealous Girl: Will get jealous if she thinks anyone's trying to steal her Fuyuki. Including his own family.
• Complexity Addiction: Some of her plans to win Fuyuki's heart rely on WAY too many variables to possibly work.
• Cute and Psycho: Sweet Momoka is a shy and cute girl with a crush on Fuyuki she just cannot confess. Her Dark Momoka personality is a Yandere Stalker with a Crush who is ready to destroy anyone who ticks her off or who she feels is her competition for Fuyuki's love.
• Expressive Hair: The weird spikes in her hair either droop or stick up depending on her mood.
• Important Haircut: A Flashback in the manga shows that she gave herself one when her Split Personality emerged.
• Harmless Electrocution: In Momoka's introducing chapter, Keroro uses the Kero ball in this manner to save her from Tamama.
• Like Father, Like Son: Momoka's split personality is nearly identical to her mother, Oka's, though while the perpetually enraged and brutal Dark Momoka is the secondary personality, Dark Oka, who is antisocial and Tsundere, is the primary personality.
• Lonely Rich Kid: Until she met Fuyuki. Her parents are constantly elsewhere around the world.
• New Transfer Student: As revealed in her How We Got Here Backstory in the manga, she used to attend a private school. Fuyuki was the first friend she made when she transferred to a public school.
• Powered Armor: Develops her own.
• Screw the Rules, I Have Money!: Frequently is able to buy her problems away.
• Shrinking Violet: Until her Split Personality takes over.
• Spikes of Villainy: Her hair does this.
• Split Personality: Momoka and Dark Momoka.
• Tomboy and Girly Girl: "Sweet Momoka" is the girly-girl, while "Dark Momoka" is the tomboy.
• Uncatty Resemblance: She shares Tamama's bipolar Yandere qualities.
• Yandere: Her split personality is one of these. This is emphasized more in the Funimation dub.

Paul Moriyama

Voiced by: Keiji Fujiwara (Japanese), Kent Williams (English), Miguel Ortiz (Spanish)

Momoka's personal servant and Battle Butler. Always on hand to tend to her every need and slightest whim, no matter what it calls for. Also serves as a surrogate parent of sorts, as her parents are almost always off doing their own thing.

---

• Battle Butler: He's capable of going toe-to-toe with Giroro if it means protecting Momoka.
• Captain Ersatz: To Ken Masters.
• Eyes Always Shut: His eyes are closed most of the time. When he opens them, he is shown to have yellow eyes.
• Worthy Opponent: He and Giroro consider each other to be this, or at least they did in Paul's debut episode.

Hojo Mutsumi/Saburo Mutsumi

Voiced by: Akira Ishida (Japanese), Joel McDonald (English, Funimation), David Lee McKinney (English, Animax) and Jaime de Diego (Spanish)

An extremely laid-back, smooth poet and artist who has an Odd Friendship with Kururu and serves as Natsumi's Love Interest (only in the anime). Runs his own radio show in the anime, and carries a special pen that lets him bring his drawings to life.

---

• The Ace: In the few times he's seen in action, expect him to do it like a hardcore badass. He is outright stated to excel in sports, academics and arts.
• Brilliant, but Lazy: Prefers lying around on rooftops to, say, actually attending school.
• Composite Character: In the manga, his name is Hojo Mutsumi. For some reason, the anime conflates him with another character called Saburo, who is a basketball pal of his in the manga, and gives him the composite name of Saburo Mutsumi.
• Covert Pervert: Strong undertones of this in the manga, bordering on Handsome Lech.
• Dissonant Serenity: Nothing unnerves him or makes him lose his cool expression.
• Expy: Very much resembles Kaworu Nagisa, and is even voiced by the same voice actor. His descent to the secret base is even inspired on Kaworu's to the Geofront.
• Friendless Background: Before meeting Kururu.
• Impossibly High IQ: Said to be 350.
• Odd Friendship: With Kururu; described as being "Wavelength buddies".
• Out of Focus: Frequently sees less action than the other human characters.
• Power of Creation: His pen.
• Uncatty Resemblance: He and Kururu are both tricksters who enjoy messing with people, he's just generally more pleasant and charismatic so it's harder to tell.
• Unfazed Everyman: He doesn't seem too fazed about the aliens who have come to invade.

Koyuki Azumaya

Voiced by: Ryō Hirohashi (Japanese), Luci Christian (English, Funimation), Andrea Kwan (English, Animax Seasons 1-2), Jessica De Borja (English, Animax Season 3-4) and Sonia Torrecilla (Spanish)

A cute, cheerful Ninja girl who found Zeroro and brought him back to her Hidden Ninja Village, befriending him and eventually accompanying him to the city, where she transferred into Natsumi's school and helped him locate the others.

---

• Action Girl: She's capable of performing various feats most teenage girls couldn't.
• Ambiguously Bi: Her devotion to Natsumi frequently has overt romantic undertones. Episodes do occasionally reference her being attracted to boys, however.
• An Ice Person: Many of her special moves are ice-based.
• Badass Adorable: She innocently shows off her superhuman abilities by performing a Wall Crawl on the side of a building in front of a whole crowd of people. Why did she think it was necessary? The third floor of the building had a restaurant that sold parfaits she wanted to try.
• Country Mouse: This is exaggerated in the English dub, but she's from a simple rural background in both versions.
• Genki Girl: Very hyperactive and as a person raised away from most, very interested in getting to learn about how people work.
• Highly-Visible Ninja: She's good at keeping out of sight when she wants, it's just... she's not so good about hiding her skills in normal, everyday life.
• Ms. Fanservice: Combines this with Innocent Fanservice Girl
• New Transfer Student: Introduced as this.
• No Social Skills: In an innocent and adorable way. She does things like try to crawl into the luggage section of a train because she thinks it would be a comfy place to sit. Natsumi is trying to help teach her how normal people act.
• Uncatty Resemblance: She and Dororo are both self-conscious ninjas obsessed with friendship. Dororo is considerably more jaded than she is, however.

The Narrator

Voiced by: Keiji Fujiwara (Japanese), R. Bruce Elliott (English, Funimation), Michael Pizzutto (English, Animax),Patrick Donnay (French, SMI dub), Philippe Catoire (French, MIE dub), and José María Regalado (Spanish)

The show's narrator. He usually points out the silliness of the series, while explaining things for the viewers.

---

• Butt-Monkey: In the Funimation dub, he is stuck working on a show he hates/doesn't understand.
• Deadpan Snarker: Mainly in the Funimation dub. At times in the original Japanese.
• Dub Personality Change: Aside from his moments of snark, the Narrator is a fairly nice guy in the original Japanese, being fond of Keroro and the others. The Funimation dub makes him cynical and spiteful.
• Lemony Narrator: Moreso in the Funimation dub. He's always commenting on the absurdities on the show, how much he doesn't like it, and is only doing the job to pay rent/gambling debts.
• The Men in Black: Appears dressed as a Kuroko with a big red N over his face.
• Trapped by Gambling Debts: In the Funimation dub he will sometimes mention he is thankful for the job helping him pay off his gambling debts.
• The Watson: Frequently questions the most absurd aspects on the show, just like a new time viewer would.

Tomosu Hinohara

Voiced by: Emiri Katou

---

• Red Oni, Blue Oni: Somewhat acts as the blue oni to Fuyuki's red in the 2014 anime.

Myou Kaneami

Voiced by: Ai Kayano

---

• Verbal Tic: "That is my hunch."

Pekoponian-like Aliens

Angol Mois

Earthling disguise

True appearance

Voiced by: Mamiko Noto (Japanese), Carrie Savage (English, Funimation), Candice Moore (English, Animax) and Ana Begoña Eguileor (Spanish)

The surprisingly cute Lord of Terror who was sent to destroy Earth as according to the prophecy of Nostradamus. Only she kind of missed her cue, and Keroro manages to convince her not to go through with it by virtue of being her beloved "Uncle". Sort of an honorary Sixth Ranger of the Keroro Platoon, though for obvious reasons she can't show off her moves all that often.

---

• Affably Evil: She's technically an Omnicidal Maniac, not that you could tell.
• Apocalypse Maiden: She was destined to cause it, but...
• Badass Adorable: She's a cute girl with a very innocent personality but she also wields the Lucifer Staff which can cause The End of the World as We Know It if she chooses to.
• Been There, Shaped History: Invoked; she's the Lord of Terror from Nostradamus' predictions because she told him of her arrival so he could warn the rest of the planet.
• Characterization Marches On: In the Funimation dub, the Gratuitous Spanish aspect of her character was eventually dropped.
• Cosplay Otaku Girl: Seems to have fun dressing in various cutesy costumes.
• Did We Just Have Tea with Cthulhu?: The volume 19 of manga elaborate this. The Angols are beings from higher plan of existence, and while you can subdue them with Angol Stone, they are essentially an enigma. Keroro is among the few that have gained the species' trust.
• Dumb Blonde: Her naivete and Pekoponian disguise makes her seem like this. She's a bit more of this in the Funimation dub.
• Gratuitous Foreign Language: In the dubbed version of the anime, she slips in the occasional Spanish word with no real explanation why.
• Gyaru Girl: She has a fairly subdued kogal appearance in her human form. She's already Ambiguously Brown, but has platinum blonde hair instead of her natural silver hair when she chooses to stay on Earth. She wears a simple brown and white school uniform, skirt, and loose socks. It definitely adds to her character design's cuteness.
  • Apparently, her father told her to do it so as to blend in.
• Holding Back the Phlebotinum: Justified by the destructive nature of her powers; one manga chapter revealed she was hiding the negative effects this was having on her.
• Humanoid Abomination: She's the god of terror (formerly) destined to wipe out the Earth. She certainly doesn't act like it.
• Love Martyr: Towards her 'Uncle'. She'll do anything if it means it'll make him happy.
• Magical Girl: Her transformation sequences, stylized costume, and related accessories may make her a parody of the "magical girl" genre.
• Magic Staff: The "Lucifer Spear", with has the power to destroy the world. Her main attack is called "Hellmageddon" and can destroy a planet in a matter of seconds to full power.
• Morality Pet: One of two for Keroro, the other being Fuyuki.
• Omnicidal Maniac: Played for Laughs.
• She Is the King: She's a girl, but her formal title is the 'Lord of Terror'.
• Slept Through the Apocalypse: Exaggerated in the anime. She slept through the one she was supposed to cause.
• Spell My Name With An S: Angol Moa in the manga, Angol Mois in the anime.
• Team Pet: An interesting inversion on the usual formula, given how the Keronians look, whereas Mois appears human-like.
• Valley Girl: In all versions, although taken up to eleven in the Spanish dub.
• Verbal Tic: "Teyuuka" ("Or perhaps I should say") before expressing an opinion.

Space Detective Kogoro

Voiced by: Nobuyuki Hiyama (Japanese), John Swasey (English) and Anselmo Herrero (Spanish)

An old childhood friend of Keroro's, Kogoro is a Space Detective who always seems to be down on his luck. Despite this, he always seems cheerful, laughing and grinning no matter what he might be thinking.

---

• Cloudcuckoolander: One even by the usual standards. He makes most other characters look sane by comparison.
• The Exotic Detective: By virtue of being a weirdo. That being said, he is a nice guy, with his friendship towards Keroro apparent.
• Hot-Blooded: Lives and breathes this. He's literally hot blooded enough to melt ice.
• Idiot Hero: An energetic exaggeration.
• Large Ham: The largest one in the butcher shop. He makes Kamina, All-Might, and Tim Curry look calm by comparison.
• Perpetual Expression: His face is perennially in a sort of powerful laughing expression (though he can lose the smile and shout in fear in extreme moments of danger). Only Rabbie can see through it and read his true emotions.
• Shout-Out: He's a parody of Kenji Ohba, the star of a Toku series called Space Sheriff Gavan. His name also comes from Kogoro Mouri from Case Closed.
  • His associated gadgets are also parodies of Gavan and other Metal Heroes gear, including: a Powered Helmet^note As in, the set consists entirely of a helmet and nothing else, a Laser Shinai, and a Cool Kid's Tricycle.
• Sibling Yin-Yang: He's a Large Ham to contrast his sister's Shrinking Violet tendencies.
• Stepford Smiler: He keeps on laughing, even when he's upset or angry.

Lavie

Voiced by: Tomoko Kaneda (Japanese), Leah Clark (English),Ana Guadalupe Hernández (Spanish)

Kogoro's younger sister, and the only one who can tell how he really feels at any given moment. As a result, she frequently has to act as a "translator" of sorts. Does her best to support her brother by taking various part-time jobs.

---

• Apologises a Lot: Usually for her brother.
• Cloudcuckoolander's Minder: For her very weird and very unusual brother.
• Shrinking Violet: She's prone to Tender Tears a lot.
• Sibling Yin-Yang: She's shy but level-headed while her brother is a Hot-Blooded moron.
• Spell My Name With An S: Rabbie/Lavie

Alisa Southerncross

Voiced by: Akiko Yajima (Japanese),and Estívaliz Lizárraga (Spanish)

An Emotionless Girl adopted by the Shapeshifting alien Nebula, who rides around as her cat-eared headband and fights for her. He takes out her opponents and eats aliens, all while searching for a way to help her become human. Alisa, for her part, seems entirely uninterested in this... but shows some interest in Fuyuki.

---

• Clothes Make the Superman: She isn't particularly powerful without her father's help.
• Emotionless Girl: Speaks blankly and apathetically and seems to not care about anything, but she really does feel deep inside.
• Heroic BSoD: She has this when Nebula was eaten by Chupacabra-like alien, even lost her sense of self-reservation.
• Magical Girlfriend: Though not an official girlfriend, the undeniable elements of this have led to... tension from Momoka/Fuyuki shippers.
• Morality Pet: Her "Daddy" and Fuyuki function as this.
• No Social Skills: She doesn't know much about normal life. Fuyuki's family often takes it upon themselves to teach her.
• Shapeshifter Weapon: Nebula.
• Unknown Rival: Unsurprisingly, Momoka hates her guts. She doesn't really know or care.
• When She Smiles: Alisa only usually makes a Slasher Smile, but she's downright heart-melting when it's genuine.
• The Worf Effect: Not to the same extreme as Giroro just yet, but all the same: when she gets knocked back, that's a problem.

The Garuru Platoon

First Lieutenant Garuru

Voiced by: Akio Ōtsuka (Japanese), Mathieu Moreau (French)

Giroro's Aloof Big Brother, a famous sniper and hero of Keron Force. Was given his own platoon, and was assigned to confront and replace the Keroro Platoon. Cue the Wham Episodes.

---

• Aloof Big Brother: How it appears, when it really isn't the case upon closer inspection.
• Big Brother Mentor: This is more obvious in the manga, where he's introduced long before the Wham Episodes, and is clearly shown before and afterwards to be very fond of his baby brother, despite Giroro's occasional seething jealousy.
• The Chessmaster: May have been subtly manipulating the entire battle to make the Keroro Platoon look good. More obvious in the manga, where he explicitly spares Kururu's life and sends him to take on Tororo, which turns the tide of battle.
• Cold Sniper: How he is presented as a soldier. However, it's clear that he is actually a nice guy, being respectful towards almost everyone.
• Evil Counterpart: Seemingly how it appeared at first towards Giroro. The evil part is dropped in a few chapters.
• Friendly Sniper: Despite what he looks, he is quite nice and friendly, and enjoys gently teasing his brother, but is still a well-respected commander.
• Goggles Do Nothing: His hat has an unique design, featuring a triangular nosepiece with yellow goggles covering his eyes. Their utility, however, is completely unknown.
• Heavy Metal: His music of choice.
• Improbable Chopsticks Skill: Inverted and Played for Laughs. Garuru is terrible at using chopsticks.
• Opaque Lenses: His yellow goggles. Only in very rare occasions they allow to see his eyes.
• Red Baron: Nightmare of Keromon.
• Weaksauce Weakness: One chapter reveals he can't use chopsticks well. Unless spearing his food with them counts.

Private First Class Taruru

Voiced by: Akeno Watanabe (Japanese), Chris Cason (English) and Estívaliz Lizárraga (Spanish)

A cute, if insanely energetic, tadpole who absolutely adores his "Master Tamama"... And, rather obviously, was tapped to be part of the Garuru Platoon, where he cheerfully played Evil Counterpart to Tamama. Often puckers his lips up in a sort of "kissy face" expression.

---

• Broken Pedestal: Goes through this with Tamama. Somewhat becomes a Rebuilt Pedestal when Tamama defeats him.
• Dissonant Serenity: After his first fight with Tamama, when he took out Paul and Momoka in short order.
• Evil Counterpart: Becomes one to Tamama by default after joining the Garuru Platoon, although he somewhat subverts it by being the least similar to his good counterpart.
• Plot-Relevant Age-Up: Apparently hit Keronian puberty before Tamama, losing his tadpole looks. In the anime, this happens shortly after an episode involving him and Karara running around with Transformation Rays, including one that controls aging.
• Punch-Clock Villain: Doesn't really think of following his orders as evil; when Tamama shows up for a rematch, is genuinely shocked by the idea that "I'm the villain in this story?!"
• Stealth Insult: His initial confrontation with Tamama during the Garuru Platoon's invasion of Earth. It comes to a head when he stops calling Tamama "Sir" after he knocks him out. Becomes a Break the Haughty when Tamama beats him in a rematch.
• Unlucky Childhood Friend: The anime has him appearing alongside Karara a few times before his Plot-Relevant Age-Up. So far, Karara has yet to turn her flings of affection towards him.
• Verbal Tic: "-ssu", a derivative of desu. Sound familiar, dood?
• Youthful Freckles: He has them.

Lance Corporal Zoruru

Voiced by: Kazuki Yao (Japanese)

A half-cybernectic assassin who appears to have joined the Garuru Platoon just to get a crack at Zeroro. Would probably love to be a Knight of Cerebus, if given the chance. Unfortunately, he tends to be even more forgotten than Dororo...

---

• Artificial Limbs: At least a full half of his body, bisected down the middle, has been replaced with robotics.
• Broken Ace: Rivals Dororo in combat, even when the latter combined his Assassin Magic and Ninjutsu skills.
• Berserk Button: Being ignored.
• Black Eyes of Crazy: Zoruru had this during his childhood, and it only got more menacing when he became an assassin.
• Evil Counterpart: Towards Dororo, whom he insists on calling 'Zeroro'. He also has elements of Foil thrown on him, as while Dororo is undoubtedly menacing in his role, he is a ridiculously sweet and sensitive frog; Zoruru, on the other hand, is openly creepy.
• Failed a Spot Check: Like Dororo, ends up on the other end of this several times. One chapter plays with this, as he sits in on a meeting with the Keroro Platoon, taking Dororo's usual spot so that the reader's eye may glide right over him without seeing anything amiss... despite having just seen Dororo leaving with Koyuki. That's before the others take it up to eleven.
• Freudian Excuse: Possibly. Volume 17 of the manga revealed he apparently attended the same school as Keroro and Zeroro, and was completely ignored when those two first met... despite standing directly behind Zeroro at the time.
• Knight of Cerebus: During the Garuru Platoon's invasion, he defeats and seemingly kills several of the Keroro Platoon's allies in rather nightmarish fashion, only to have this Subverted by an Anticlimax. Attempted again in Volume 17.
• Red Eyes, Take Warning: One eye, red pupil, black sclera. Judging from the Flashback in Volume 17, these are his natural eyes.
• Unknown Rival: He's perfectly capable of being an excellent rival to Dororo... if he wasn't so forgettable that literally everyone stops noticing him with in seconds. He has to go out of his way to get people's notice.
• Verbal Tic: Dramatic stammering, as in "Z... Zeroro..."

Recruit Tororo

Voiced by: Kappei Yamaguchi (Japanese)

An incredibly irritating tadpole who hacked into Keron Forces' computer once, got caught and was promptly recruited. Considers himself Kururu's rival, and longs for the chance to put him through the ultimate Humiliation Conga.

---

• Evil Counterpart: To Kururu. Among the Garuru Platoon members, he is the one who resembles the most his Keroro Platoon counterpart, both in physique and personality, down to having a similar signature laughter. And it is, apparently, because he intentionally copies Kururu in his attempt to be his rival. However, he is also meant to evoke Tamama, being the over-enthusiastic tadpole of his platoon.
• Oh, Crap!: When Kururu reveals that practically all of his programs are just inferior versions of Kururu's older projects, then immediately turns the tables on him.
• Recruiting the Criminal: Didn't sign up voluntarily, but was drafted after Keron Force caught him poking around their systems.
• Signature Laugh: Pupupu...
• Unknown Rival: Considers himself Kururu's rival; Kururu doesn't even remember him... And when he does, it doesn't end well for Tororo.

Ko-Kero

A Sixth Ranger of sorts for the Garuru Platoon's debut, with very different origins in the manga and anime. The manga version is a Creepy Child clone intended to "replace" Keroro, while the anime is a deaged, Brainwashed and Crazy Keroro.

---

• Brainwashed and Crazy: Only in the anime.
• Put on a Bus: Manga only; the clone's ultimate fate is never detailed.

Chief Medic Pururu

Voiced by: Satsuki Yukino (Japanese), Terri Oliver (English)

A childhood friend of Keroro, Giroro and Zeroro. Originally a civilian medic, she got bored and joined the military, ending up assigned to the Garuru Platoon.

---

• Affirmative Action Girl: Both in the Garuru Platoon and in the younger Keroro's circle of friends; she wasn't mentioned or shown in any flashbacks until her debut episode.
• Afraid of Needles: Her weapon invokes this.
• Badass Adorable: She's a medic that can kick ass with her syringe.
• Corner of Woe: Triggered when someone calls her obasan (auntie/old lady) or makes any sort of reference to her age.
• Evil Counterpart: Averted, as she is both introduced after the Garuru Platoon's Heel–Face Turn and lacking a direct equivalent in the Keroro Platoon. However, as she somewhat acts as her group's moral center, she might be considered Keroro's counterpart.
• Girl with Psycho Weapon: A giant syringe.
• The Heart: Of her platoon.
• Hospital Hottie: Triggers the usual "Hello Nurse!" reaction from Keroro.
• Improbable Weapon User: Syringes. Big ones.
• Older Than She Looks: About Old Maid level... in Keronian years.
• "Uh-Oh" Eyes: Sometimes gets a creepy look in her eyes... usually while she's still smiling. Especially in the manga...
• Yandere — Pururu has... interesting ways of showing her affection. Particularly in the manga, where she openly encourages Natsumi to torture Keroro more, smiling brightly the entire time. Pururu is a nurse, the more abused Keroro gets, the more he needs her medical attention.

The Shurara Corps

Shurara

Voiced by: Norio Wakamoto (Japanese)

The leader of a group of anime-only villains (created in the franchise after characters submitted by fans to the official Keroro Land magazine) who are out to steal the Keron Star from Keroro. Notably, all of the members were based on fan-submitted characters, meaning they all ascended to anime canon. The whole arc turned into a giant Monster of the Week-fest.

---

• Broken Ace: Powerful enough to beat Dororo in seconds. But is clearly not well in the head.
• Evil Is Petty: Wants revenge on Keroro because he stole Shurara's band-aid that Pururu gave him as kids. Jarringly, only Keroro himself notes how idiotic Shurara's motive is.
• Humiliation Conga: Near the end, Keroro's mocking words, combined with the Keromet cause Shurara to suffer big time.
• It's Personal: Shurara feels nothing but anger at Keroro, convinced that the latter is always humiliating him.
• Never Bareheaded: Always shown wearing an elaborate silver-and-gold helmet.
• Third-Person Person: SHURARAAAAAA~!!

Master Painter Putata

Voiced by: Kentarou Tone (Japanese)

A spotted yellow Keronian who can bring his paintings to life. Highly excitable.

---

• All There in the Manual: His background notes reveal he is from a rich family, was born as Anono and has an Aloof Big Brother named Siroro.
• Art Initiates Life: With a snap of his fingers!
• Couldn't Find a Pen: His brush is actually a nyororo that uses Keronian fluids as ink.
• Dub Name Change: Known as "Pumama" in Spain due and to "Tintata" in Italy due to idiomatic ordeals (to understand, "puta" means "whore" in both languages).
• Gratuitous English: His Verbal Tic: "Yeah! Yeah! Yeah! Yo! Yo! Yo!"

Super Marionette Mekeke

Voiced by: Yuichi Nagashima

Putata's partner in crime and a master puppeteer who conceals himself via invisibility while fighting with his puppet.

---

• All There in the Manual: According to his background notes, he is an orphan, implying he probably made his puppet in order to overcome his loneliness.
• Canon Immigrant: In a way - Mekeke's puppet and apparent body was created by a fan like the rest of the Shurara Corps, but his real body was designed by Mine Yoshizaki.
• People Puppets: Another of his talents.
• Shout-Out: He is one big reference to Sasori from Naruto, down to his very background and to being partnered in his corps with an eccentric artist character.

Giruru

Voiced by: Kunihiko Yasui (Japanese)

A mutant Keronian made of pure blue slime. Can transform others into mutants like him, but is weak to anything that can make him solidify. Brother to Dokuku.

---

• Blob Monster: The more intelligent sort.
• Body Horror: Can turn others into living puddles of flesh.
• Making a Splash: Giruru's attack style. You'd be amazed how good of a fighter a viscus blob of fluid is.
• Oblivious Love Interest: In the card game Anokoro Keroro Gunsou, his teammate Hanana is in love with him. Not that he realizes or cares.
• Sibling Yin-Yang: With his younger brother, Dokuku.
• Weaksauce Weakness: Powder. Any kind of powder.

Dokuku

Voiced by: Takeshi Kusao (Japanese)

A ghostly Keronian with a heavily scarred face, a scythe blade replacing his left hand, and a demonic symbol. Brother to Giruru.

---

• Red Right Hand: His scythe-arm.
• The Unintelligible: He can only speak by saying his name, much like a Pokemon. However, his brother seems to understand him just fine.

Kagege

Voiced by: Toshio Furukawa (Japanese)

The assassin of the Shurara Corps, an older tadpole who can manipulate shadows.

---

• Cryptic Background Reference: He claims to be apprentice of Captain Jirara, a character who appears much later.
• Dub Name Change: His name was changed to "Zagege" in Spain, as "kage" is a homophone for a verbal form of "shitting" (also for "fear", interestingly) in Spanish.
• Living Shadow: Kagege has the power to bring people's shadows to life and make them attack their owners.
• Power Glows: And so does Kagege. Constantly.

[[//folder]]

[[folder:Seamstress Nuii]]

Voiced by: Kurumi Mamiya (Japanese)

Once an abandoned Keronian doll, Nuii was brought to life by Shurara and made into one of his agents. She had the ability to turn everyone into plush dolls like herself, and under Gyororo's supervision, inflitrated the Hinata household in the guise of Natsumi's old teddy bear.

---

• Ambiguous Gender: There is heated debate as to whether Nuii is male or female, funny as it sounds.
• Early-Bird Cameo: Before appearing on the anime, she made her franchise debut in the spin-off card game Anokoro Keroro Gunso. The Nuii who appears in this game, however, is explicitly not the same person.
• Heel–Face Turn: Almost results in Redemption Equals Death.

Spy Gyororo

Voiced by: Hiromi Hirata (Japanese)

Nuii's superior, a Keronian covered in Extra Eyes who can blend into his surroundings, making him a perfect spy.

---

• Faceless Eye: When he's in his invisible mode, he is sometimes only seen as one of his many eyes.

Robobo

Voiced by: Keiichi Sonobe (Japanese)

A robotic Keronian with scanner eyes, magnetic hands, built-in jets and the ability to fuse others with nearby mechanical objects.

---

• Interplay of Sex and Violence: When Dororo delivers the final blow on Robobo, he seems to have a random orgasm before exploding.

Yukiki

Voiced by: Eiji Maruyama (Japanese)

A snowman Keronian who can summon massive gusts of arctic winds and freeze everything around him. However, he's weak against any sort of heat.

---

• Minion with an F in Evil: Forcing people to play fun New Years games is not exactly evil.

Other Keronians

Keroro-papa

Voiced by: Kenichi Ogata (Japanese) and Greg Dulcie (English)

Keroro's father and a very famous war veteran. The mere mention of his name sets off all kinds of Parental Issues for his terrified son. However, in person, he seems to be rather laidback...

---

• Bunny-Ears Lawyer: Usually acts like a normal middle-aged man, even being absent-minded at times. Still, Keroro-papa was an incredible soldier in his prime, with even members of the Viper race in fear of him. Furthermore, he and Giroro's father are close friends with mythical figures like Santa Claus.
• Like Father, Like Son: Keroro-mama certainly seems to think so, noting their airheaded nature and immense potential. This is more evident in the dub, where Keroro's dad is rewritten as a proud war criminal.
• Retired Badass
• Unnamed Parent: Like most of the parents...
• "Well Done, Son" Guy: Just the mention of his name turns Keroro into this. Ironically, Keroro-papa clearly dotes on him, even if Keroro's fear prevents him from recognizing it.

Keroro-mama

Voiced by: Sachiko Chijimitsu (Japanese)

Keroro's mother who first appeared in the KeroZero short shown before the 4th Movie. She's very loving toward her son like a good mother, but she also seems to have a tricky side to her.

---

• Amazingly Embarrassing Parent: She just loves thanking everyone in Keroro's presence, offering them gifts as a show of appreciation for 'looking after her son'.
• Body Snatcher: Although Natsumi was the one who had the idea of switching bodies with her, with the consent of both, afterwards she just disappeared with Natsumi's body, going to sight see Pekopon and even on a date with Giroro (Even though he knew it was Keroro's mother) while Natsumi in her body got dragged to another city by Keroro's father, who didn't know what happened.
• Generation Xerox: Her son definitely got her looks.
• Hidden Depths: Despite acting like a stereotypical housewife from the late 90s, Keroro-mama can be quite astute at times, with both Keroro and Keroro-papa afraid of her wrath. Furthermore, she once off-handedly mentions being lunch friends with Obaba, whom Kururu revealed later on as the former supreme commander in the Keron army's Grand Star branch.
• Hopeless with Tech: Is pretty bad at using her cellphone, even accidentally sending a message for Keroro to her "lunch friend" in episode 262.
• Mrs. Robinson: She actually went into this on Giroro. Played entirely for laughs, since Giroro's lust for Natsumi's body is clearly at effect.
• Shout-Out: Her design is very reminiscent of the mother in Atashinchi, who was voiced by Kumiko Watanabe, Keroro's voice actor.

Giroro-papa

Giroro and Garuru's father. Appears to have a reputation almost as terrifying as Keroro's father, though he's not mentioned as often. Makes a habit of turning even the simplest tasks into 'tests' for his sons.

---

• Drill Sergeant Nasty: He fits this Trope rather nicely in the Chibi-Kero Short.
• Unnamed Parent: He is not given a name.

Dororo-mama

Dororo's mother. Looks exactly like her son (in a dress), and apparently passed down a lot of her personality traits, too. Whenever she sees Keroro, Giroro or Pururu, she immediately thanks them for being friends with Zeroro. Repeatedly. Over and over and over...

---

• Beware the Nice Ones: Guess where Dororo got his ass-kicking genes from.
• Generation Xerox: She looks exactly like Dororo...
• Shy Blue Skinned Girl
• Unnamed Parent: Look above, she's got no name!

Karara

Voiced by: Junko Noda (Japanese) and Alison Viktorin (English)

An extremely cute Keronian tadpole, Karara is an extremely naive daydreamer who dreams of finding her Knight in Shining Armor and falls in love at the drop of a hat with anyone who helps her out. Avoids Stalker with a Crush mainly because she runs off and does her "Bridal Training" offscreen, then shows up childishly expecting to have her affections returned...only to transfer her crush to someone else and start the whole process over again.

---

• Ascended Extra: Appeared briefly in the manga; became a recurring character in the anime.
• The Ojou: Her father's incredibly rich.
• Manic Pixie Dream Girl: She could be this, if she ever stayed focused on a single love interest for more than an episode or two.
• McNinja: The result of her crush on Dororo: she and her sister show up as hyperactive kunoichis. Hilarity Ensues.
• Running Gag: Almost always falls for somebody else every time she shows up.

Chiroro

Voiced by: Natsuko Kuwatani (Japanese)

Karara's fraternal twin sister. Doesn't appear as much or get as much character focus as her sibling.

---

• Demoted to Extra: Taruru replaced her as Karara's constant companion in early episodes; she only got to debut after his Plot-Relevant Age-Up, and is still very much in her twin sister's shadow.
• The Ojou: Same as her sister, though this generally isn't invoked as much for her.

Joriri

Voiced by: Junichi Sugawara (Japanese)

An anime-exclusive character based on a fan submission, Joriri is an unshaven bum who appears in various flashbacks, giving the Keroro, Giroro, Zeroro and Pururu questionable advice and generally being a poor role model. May have been introduced to add an "adult!Keroro" style character to the past, even though the younger Keroro already filled that role. Recently showed up in the present.

---

• Ice-Cream Koan: His big gimmick involves imparting an extremely odd form of sage wisdom that doesn't make a lot of sense.
• Perma-Stubble: Not an action hero, though.
• Sixth Ranger: He joins the Keroro platoon in the 6th season... for one episode. Although that event is still referenced later.

Assassin Captain Jirara

Voiced by: Kouji Yada (Japanese)

Leader of the X1 assassin troop on Keron, and Zeroro's trainer in the art of killing. Cold and merciless and wanted in several galaxies, it only makes sense that he popped up on Pekopon...

---

• Artificial Limbs: It almost seems like this is a requirement for spooky assassin-types.
• Drill Sergeant Nasty/Sadist Teacher: Jirara trains his underlings by making them constantly fight each other nearly to the death. If you die, you were a bad student anyways.
  • However, a Flashback in Volume 17 of the manga reveals that he deliberately chose a Lighter and Softer alternative to making Zeroro a full-fledged assassin, despite acknowledging that Zeroro had excelled in his training. When his pupil begged for an explanation, Jirara tells him flat-out that the assassin's path is "darker than you can even imagine".
• Giant Spider: He takes on this form in Dororo's nightmare.

Warrant-Officer Bariri

Another character solely from the anime. Despite his rank and the respect he apparently has, he's very... crazy. Most of this is put in the direction of his unhealthy infatuation with Pururu. Really, really unhealthy.

---

• Love Makes You Crazy: And oh how it does. It's even more than just a Trope name. He's literally shown going to a psychiatrist about his insane love for Pururu.

Other Aliens

Sumomo

Voiced by: Juri Ihata (Japanese), Caitlin Glass (English) and Sonia Torrecilla (Spanish)

A pink Keronian-like alien, known as an Axolotl. She's a highly popular and very spoiled Idol Singer who likes to pull Ratings Stunts.

---

• Animal Motifs: She's associated with axolotls. There are three points on each side of her head that resemble an axolotl's frills, and her spaceship is an axolotl.
• Ascended Extra: Starred in a one-shot side story in the manga; became a recurring character in the anime.
• Idol Singer: Her profession.
• It's All About Me: Doesn't really care if others are hurt by her antics.
• Ratings Stunt: Like, say... pretending to be Natsumi via Ridiculously Human Robot and wreaking her life for kicks, then getting confused when Natsumi gets pissed.
• Voluntary Shapeshifting: Can transform into a human-like form at will.

Vipers

Voiced by: Nobuo Tobita (Japanese) and Chris Patton (English)

An alien race of humanoid snakemen, the Vipers are natural enemies of Keronians and are dangerous, deadly predators. Most of the Vipers that show up in the anime have a personal vendetta against the Keroro Platoon, thanks to what happened to the first Viper that targeted them. In the manga, on the other hand...

---

• Only Six Faces: Exaggerated. They only have one face and voice.
• Shout-Out: To Space Adventure Cobra; notice that they don't look like real vipers because they have cobra hoods.
• Species Surname: All of them are named Viper.
• The Worf Effect: In the manga, one shows up during Alisa's introduction just so she can eat him.

Movie-Exclusive Characters

Kiruru

Voiced by: Mikel Gandía (Spanish)

A sort of ancient Keronian super weapon that feeds off of negative emotions to gain strength and destroy planets. While not necessarily movie exclusive, they're a very big element of the first and third movies, and become a victim of the Worf Effect in the second. In the first movie, Keroro and Fuyuki accidentally unleash one on Tokyo.

---

• The Dreaded: Is among the most powerful weapons in the galaxy. Neither Dororo nor God Keron itself hold a candle to its powers. It took Angol Mois' attack to cause any real damage, which was reverted in seconds.
• The Tokyo Fireball: Kiruru's doing.
• Worf Effect: A Kiruru was defeated by Maru and Meru in the second movie, showing how much of a threat they were. Likewise, Keroro stopped one in the manga, via subconsciously tapping into his full potential.

Mirara

Voiced by: Estívaliz Lizárraga (Spanish)

An ancient Keronian weapons specialist that sealed away the first Kiruru, but got stuck in the proverbial can with him as well. She works off of positive emotions, and is able to turn into a key, the only thing that can reseal the Kiruru and save the world.

---

• Emergency Transformation: Granted, she couldn't do it until the characters actually got along again.
• Exposition Fairy: To Keroro and Fuyuki.
• Reset Button / Status Quo Is God: The plot couldn't allow the Keroro Platoon access to knowledge of ancient Keronian technology, as it might have allowed them to conquer Earth, especially as she was getting along with Kururu. So of course something happens to her by the end of the movie.
• Senseless Sacrifice: By the 2nd movie it's shown that the Maronians can easily take out a Kiruru, so vanishing to seal it up is more or less pointless as a long-term solution.

Meru

Voiced by: Houko Kuwashima (Japanese), Estívaliz Lizárraga (Spanish)

A Maronian living at the bottom of the ocean who was feeling lonely one day and as a result, abducted Natsumi to be his princess. In the end, all he wanted was a mother figure rather than a princess.

---

• Canon Immigrant: The storyline from the second movie was eventually adapted to the manga, including Meru in it.
• Jerkass: To Maru.
• Parental Abandonment: His main issue.

Maru

Voiced by: Rosa Romay (Spanish)

The only other friend Meru has, despite the fact he treats her like his servant and is generally unpleasant to her. Regardless, she remains chipper and incredibly loyal to him.

---

• Canon Immigrant: The storyline from the second movie was eventually adapted to the manga, including Maru in it.

Dark Keroro

Voiced by: Nuria Martín Picó (Spanish)

The primary antagonist of the third movie. Cloned from a sample of Keroro's own DNA, taken off the Kero Ball when it was lost in an ancient Keronian facility hidden in the ancient city of Macchu Picchu in Peru.

---

• Evil Doppelgänger: Comes with the nature of being Keroro's evil clone.
• Heel–Face Turn: After the end of the movie, he becomes good and decides to travel the universe.
• Hijacked by Ganon: Turns out Dark Keroro was basically the third Kiruru after absorbing Keroro's DNA off the Kero Ball, complete with Miruru taking the same role as Mirara.
• Large Ham: "TWO MINUTES is all I need to conquer this mud ball!"
• What Is This Thing You Call "Love"?: Platonic variant. He's unable to understand why the human characters and the Keronian characters are friends with each other.

Shivava

Voiced by: Estívaliz Lizárraga (Spanish)

One of the members of Dark Keroro's army. A skilled fighter who acts like a braggart, but can back up his words.

---

• Arrogant Kung-Fu Guy: He is a skilled, yet pompous fighter. Tamama instantly hates him because of his attitude.
• Boom Stick: A staff WITH LASERS.
• Calling Your Attacks: Does this pretty much all of the time. In fact, Tamama defeats him by blasting him out of the sky when he was calling one of his attacks.
• Homage:
  • To Sun Wukong of the Journey To The West tale that Dragon Ball was based on. Note his 'symbol', which is really a band around him that resembles the flying cloud, while resembling Wukong's Restraining Bolt. He even uses the original 'Great Saint That Surpasses Heaven' title when he first appears.
  • He's also a pretty direct reference to Goku from Dragon Ball. He uses a blue blast of energy at one point charged up similarly to the Kamehameha and, in the final battle, attempts to use the Genki Dama while fighting against Tamama and Momoka, even calling up for other people's power. One of the scenes featuring him in the credits sequence is a homage to Dragon Ball's original ending and another one shows him in a place very similar to the Tenkaichi Budokai tournament, fighting against someone with the body obscured, but wearing pants and shoes identical to Yamcha's in the 22nd and 23rd Budokais.

Doruru

Voiced by: Txemi del Olmo (Spanish)

One of the members of Dark Keroro's army. A skilled fighter who prefers to let his weapons do the talking for him.

---

• Blood Knight: The guy likes to fight, and he does it well.
• More Dakka: Doruru has Arm Cannons, rocket launchers on his back and four miniguns IN HIS HAT. And his own Dendrobium Orchis much like Giroro's.
• Terse Talker: Doruru doesn't speak often. When he does, he hardly ever says anything longer than three syllables.

Miruru

Voiced by: Rosa Romay (Spanish)

Appearing at the same time as Dark Keroro, she's the only one capable of operating their Ominous Floating Castle, but there's something about her that even he doesn't know...

---

• Expy: Of Mirara from the first movie.
• Power Gives You Wings: As her alter ego Nazca.

Shion

Voiced by: Nana Mizuki (Japanese)

One of Momoka's old friends, and shares a lot in common with her - except that her rich parents passed away early on. All she wanted was a real family, and from the depths of Mont-Saint-Michel, someone answered...

---

• Anti-Villain: An orphaned girl who forcibly turns the Keroro Platoon into dragons... but all of this is done out of an attempt to save the suffering Earth Dragon and have it as a family member. However, she apparently didn't get the memo that awakening the dragon will cause the Earth's destruction.
• The Kid with the Remote Control: The ancient book that only Shion can read summons the Earth Dragon in the first place.

Terara

Voiced by: Ikue Otani (Japanese)

The Earth Dragon who Shion attempts to summon to add to her "family". However, its power is far too much for her to handle...

---

• Meaningful Name: Terara comes from 'terra', meaning Earth. Can also be read as referring to terror...
• Superpowered Evil Side: The Earth Dragon form, though it's officially sealed away by the end.
• Cheerful Child: In his Keronian form, with Koyuki outright stating it. Really, he even deems Kururu a good guy, something which annoys the latter.
• Platonic Life-Partners: Shares this bond with Shion, similar to the Keroro Platoon and their Pekoponian friends.

Pierre

Voiced by: Daisuke Gōri (Japanese)

Shion's legal guardian, very similar to Paul in more ways than one can imagine.

---

• Battle Butler: Rivals Paul in prowess.
• Captain Ersatz: Like Paul channeling Ken Masters, Pierre turns into E Honda during their battle.
• Homage: In line with the ∀ Gundam references in the 4th movie, Pierre has a White Doll moustache.

Io And Rana

Aku-Aku

Voiced by:

---

• Fatal Flaw: Arrogance and Wrath. Notably, Keroro uses this in their final battle, sealing Aku-Aku's defeat.
  • Likewise, even after being severely weakened, Aku-Aku chose to retaliate instead of escaping. This allows Nebula to consume him.
• Hoist by His Own Petard: Had Aku-Aku consumed or killed Keroro at the start of the film, he would have probably been unstoppable.
• Laser-Guided Karma: Twice near the end.
  • Consumed Giroro and the others' powers, but continuously dismissed Keroro as "worthless". It later finds out Keroro was Not So Weak after all, something Giroro lampshades in defiance.
  • After learning from his mistake and trying to consume Keroro, Aku-Aku ends up consumed by Nebula.
• Oh, Crap!: When learning that Keroro was Makemake's chosen host. Has an even bigger one once defeated.
• One-Winged Angel: In his first stage alone, Aku-Aku could take on Tamama, Giroro, Kururu, and Dororo simultaneously. Likewise, he becomes a borderline Physical God after absorbing their powers. Who knows what would have happened if he consumed Keroro's hidden potential.
• Worthy Opponent: Somewhat deemed Giroro and the others as this, thus consuming their powers. Subverted towards Keroro, at least until their final battle.

---