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Kaiju
Gamera
- Adaptational Badass: Gamera is always badass, but this version of him stands out for having far more powers than usual, such as being able to perform something akin to the Vanishing Fist without having to lose an arm, an EMP pulse that can throw off his enemy's senses, the ability to turn himself into a living buzzsaw, manipulate gravity, and fire a Wave-Motion Gun capable of shooting a hole through the moon (though at the cost of his own life). It's notable that all of these powers are just things he can do in this version without having to absorb additional mana or anything else.
- Adaptational Wimp: In a weird sense, as he noticeably lacks a couple of abilities that his previous incarnations had and made full use of, such as his ever-important ability to absorb vast amounts of thermal or radioactive energy or his Heisei variant's ability to evolve himself over time.
- Alien Blood: This version of Gamera has glowing teal blood.
- Ambiguous Situation: Exactly how Gamera's psyche works is a complete mystery. Specifically, his level of sentience is heavily called into question by his origin, which depicts him as a mindless bioweapon that was reprogrammed into a protector, but his ability to override his original programming of his own accord implies he's heroic of his own accord.
- An Arm and a Leg: Loses an arm to Guiron, though this doesn't impede his flying since both his wings are somehow intact. Hell, it doesn't even impede his ability to fight with that arm, shown when he pummels Viras with the stump
- And Your Reward Is Infancy: After fighting to his limit and then some after taking down the Eustace Foundation and their kaiju, he crumbles to dust and leaves behind an egg which hatches into a tiny infant reincarnation. While he will probably be needed another day, for now he can rest.
- Benevolent Monsters: As per usual, Gamera is the good guy. In fact, he's probably the most unambiguously heroic version of Gamera thus far, as not only does he go out of his way to protect humans (children especially), he takes pains to limit the damage his fights cause. Notably, even when the Eustace Foundation tries to reset his programming, all it takes is a small pep talk to immediately reassert his benevolence, without having taken more than a couple of menacing steps.
- Big Damn Heroes: The military's attempt to stop the Gyaos has ended in utter failure, the kids are cornered by the infant Gyaos, and all seems lost...then Gamera arrives and casually demolishes the smaller Gyaos before taking on the fully grown adult.
- Breath Weapon: Gamera shoots explosive fireballs like in the Heisei Trilogy. At the end of the series, he fires a green energy beam at the Eustace Foundation HQ on the moon.
- Composite Character: Combines traits of his prior incarnations:
- Like Showa Gamera he's the friend of children and fights the same lineup of monsters.
- Like the Heisei Gamera he's a ruthless yet benevolent kaiju who can ignite his own limbs on fire to power up and has to fight an evolved Gyaos as his last foe.
- Like Avant Gamera he can reincarnate as a baby after self-destructing.
- Dangerous Forbidden Technique: His most powerful attack is the Orylium Beam, an energy blast from his mouth able to reach into deep space and blow a hole straight through the moon. Immediately after using it, Gamera dies and disintegrates into dust.
- Dented Iron: Unlike the other continuities, where the monster encounters were widely spaced out, the series occurs over the course of only a few weeks, so Gamera has very little time to recover from each battle. Gamera begins to tire more easily as he sustains worse and worse injuries with each fight.
- Destructive Savior: Subverted: while he's big and extremely powerful, Gamera actually goes out of his way to minimize the damage from his fights, moreso than previous versions. This is most evident in his fights with Gyaos and Jiger, in which he actively throws them into clearings before using his supercharged fireball to finish them off with minimal damage.
- Determinator: Is explicitly stated to never give up, and it shows as he tears his way through the other kaiju despite his wounds. He continues fighting even after losing an arm and ultimately sacrifices himself to kill the heads of the Eustace Foundation.
- Elemental Punch: Gamera is able to heat up his arm until it's red-hot for an elemental attack. Unlike his Heisei counterpart, he can do this without losing the arm and uses it to defeat Jiger by shoving it down her throat.
- EMP: Gamera is capable of emitting a huge blast of electromagnetic energy to stagger his opponents like he does with Zigra and S-Gyaos.
- Friend to All Children: Several times in the trailers and summaries, he seems to be intentionally protecting the children from the evil kaiju.
- One notable example in the series itself is when Gamera blocking Guiron's "shurikens" so that none of them would hit the building where the kids are still in.
- He goes berserk on Viras when the Golden Devil seemingly gets Joe killed.
- Also, in the penultimate episode, Gamera catches the escape pod the kids and Tazaki are on to keep it from crash-landing, even though he crashes himself and is left nearly dead because of it.
- We learn near the end of the season that Gamera was altered to be this by traitors to the Eustace Foundation to be this so that he could stop the Foundation and the other Kaiju.
- Gentle Giant: While fierce to other kaiju, Gamera never intentionally harms an innocent human and goes out of his way to protect them whenever possible. He even refuses to fight back against the military when attacked. The only humans he ever kills on purpose are the Eustace Foundation heads, who are also the ones behind everything.
- Good Is Not Soft: A defender he might be, but he's absolutely brutal against his foes.
- Healing Factor: Gamera can regenerate from wounds, the problem being more he's running a gauntlet and not given any time to rest and fully heal between fights. When he's got a few days to heal, he can heal stab wounds and slashes without much issue. While it's unclear if he could regenerate his lost arm given enough time, he does regenerate the eye he lost to Guiron come his next appearance and from being impaled. Getting supercharged by the military let's him heal from near death to full in a few hours, though he has to awaken prematurely to stop S. Gyaos.
- Heel–Face Brainwashing: Gamera's origin, as he was created with the intent to eat humans, but was stolen and reprogrammed into a protector. However, by the present he's become genuinely heroic enough to resist and override a virus intended to reset his programming on his own rather quickly.
- Heroic RRoD: Gamera sustains horrible wounds fighting Guiron including losing one of his arms, gets beaten unconscious by Viras, pushes his power to its limits to catch up with Viras in space while using all his power to create a barrier to fly through Viras' Lightning of Hemueden so he can kill the Golden Devil, and finally catching the escape pod the kids are in and crash landing back on earth. And this leaves Gamera on the verge of death and needing help from the military to recover.
- Heroic Sacrifice: Gamera uses up all of his remaining power to take out the heads of the Eustice Foundation on the moon, causing him to crumble away into dust. Although thankfully, he left an egg behind.
- Heroic Willpower: At the end of the season, the Foundation tries to use Mind Control on Gamera (courtesy of Super Gyaos' virus) to return him to their side. However, after hearing Boco declaring his faith in him, Gamera quickly manages to regain himself and take out the Foundation once and for all.
- Iconic Attribute Adoption Moment: Gamera doesn't use his flying saucer style flight for the first three episodes. He finally reveals it in KILL while also revealing its been reimagined as an attack, turning him into a flying buzzsaw.
- It Can Think: Gamera seems to be the sole kaiju with more than just animalistic instinct behind his actions, including being able to identify humans to protect them and figure out how to best minimize damage from his fights. This likely has to do with him being reprogrammed from a bioweapon to a benevolent protector.
- Impaled with Extreme Prejudice: Guiron impales him through the chest on his head knife. It hurts and causes Gamera to collapse, but isn't enough to kill him or stop him from killing Guiron.
- Lightning Bruiser: Despite being built like a brick wall and hitting like a freight train, he's also really fast and agile, moving with a velocity and grace usually seen in a much lither or lighter monster, such as Zilla.
- Playing with Fire: In addition to the explosive fireballs the character is typically known for, he also has the ability to generate tremendous amounts of heat from his body as a weapon. Such as superheating his fist to burn Jiger from the inside-out.
- Red and Black and Evil All Over: After being infected with Super Gyaos' RNA virus, Gamera's scales turn black and his irises turn red as the Foundation assert control over him and attempt to use him to wipe out humanity. He overcomes that within seconds, though.
- Reused Character Design: Gamera's design in this series is similar to the one from the 2015 Gamera short film, except this one returns to the dark bluish-green coloration of the Showa and Heisei incarnations.
- Ramming Always Works: Gamera can jut out spikes around the rim of his shell and spin around in his "flying saucer" mode to finish off his opponents. It's how he disposes of Guiron and Super Gyaos.
- Ridiculously Cute Critter: The new hatchling Gamera seen at the end of the season is nothing short of adorable!
- Spectacular Spinning: As per usual, Gamera has his 'flying saucer mode', though here it's reimagined as one of his strongest attacks.
- Taking You with Me: His final attack kills him, but also wipes out the Eustace Foundation heads on the moon in the process.
- Token Heroic Orc: Gamera is the sole kaiju on humanity's side. Justified, as he was created to be a bioweapon originally, but stolen by a defector and reprogrammed into a guardian, which seemed to have made him much smarter.
- Turtle Power: As per tradition, he's a turtle and among the most powerful kaiju there is.
- Unstoppable Rage: Joe seemingly perishes due to Viras. Cue Gamera chasing down and unleashing a positively vicious One-Hit Kill upon the squid monster with a flat-out hateful look in his eyes as payback.
- Worf Had the Flu: While Gamera is very powerful befitting a kaiju, every fight results in him being injured in some form or another, up to and including losing a limb, impalement, and cardiac arrest. Given that he appears to both lack a rapid Healing Factor, and subsequent time to rest means he goes into each subsequent battle with several built up handicaps and exhaustion, presumably making it tougher for him.
Gyaos
- Alien Blood: Like their original incarnation, Gyaos have purple blood.
- An Arm and a Leg: The giant Gyaos in the first episode loses its right leg to a fireball.
- Bat Out of Hell: They're even more bat-like than their Showa incarnation and are pretty horrifying to look at.
- Composite Character: A rare case of a character being composited with a completely different character as they possess Zedus' spear-like tongue. Fitting, as Zedus' origin was via a lizard eating Gyaos flesh.
- Eye Scream: In the first episode, one of the smaller Gyaos gets a massive shard of glass in its eye while Gamera gouges out the larger one's right eye.
- Fragile Speedster: Gyaos can fly fast and their beams are pretty damaging, but they can't take damage and are swatted by Gamera like bugs.
- Reused Character Design: Like Gamera, the Gyaos' design is similar to the ones from the 2015 short film, except this design is a brilliant red, and they later adorn purplish hues on their horns and spines as they grow bigger.
- Starter Villain: A flock of Gyaos are the Monster of the Week for the first episode.
- Starter Villain Stays: Super Gyaos comes back as a giant monster in the second to last episode, and becomes the Final Boss of the series.
Jiger
- Adapted Out: Jiger no longer has the ability to inject smaller Jiger via her tail like she did in Gamera vs. Jiger.
- Adaptational Wimp: While Showa Jiger always seemed to be at a disadvantage strength wise, she outmatched Gamera with her tricky powers of flight, x-ray beam, larvae injection, telekinesis and spine projection. This one only has a stabbing tail.
- Alien Blood: Jiger's blood is dark blue, almost purple.
- Beware My Stinger Tail: While it can't inject smaller Jiger with it, it still uses its tail to stab Gamera several times.
- Horns of Villainy: Jiger has several horns on its head.
- Kill It with Fire: Gamera burns her from the inside out with his fist before burning what's left with his fireball.
- Monstrous Cannibalism: At first, there are multiple smaller Jigers, but they all end up eating each other to increase their mass until one is left.
- Spikes of Villainy: Jiger is covered in spikes and has several horns on its head.
- Vocal Dissonance: For a threatening and menacing kaiju, Jiger has a pretty strange-sounding roar.
- Third Eye: Jiger has a third eye underneath its horn.
Zigra
- Adaptational Nonsapience: The Showa Zigra was an alien conquerer able to talk, but this version only has animalistic intelligence.
- Beware My Stinger Tail: Zigra has a sharp tip at the end of his tail that he can use to stab his opponents.
- Breath Weapon: Zigra can fire electromagnetically-shaped plasma charges from its mouth that are capable of punching through ships.
- Graceful in Their Element: He's exceptionally fast underwater, able to travel at speeds of over 200 knots, but he's cumbersome on land, being capable of only slowly crawling on all fours.
- It Can Think: Compared to the near completely rabid Gyaos and Jiger, Zigra is shown to be much more intelligent and capable of strategy.
- Threatening Shark: Although he has the shape of a stingray more than a shark.
- Rubber Man: Zigra's tail can telescope out to absurd lengths, enabling it to throttle Gamera as well as stab its belly from underwater while perched on a nearby mountain.
- Super-Speed: As long as it is in water, Zigra can move at speeds well in excess of 200 knots by surrounding itself in cavitation bubbles.
Guiron
- Adaptational Slimness: The Showa Guiron had a bulky bulk. This version has a more slender build.
- Alien Blood: As it's killed, Guiron is shown to have purple blood.
- Baritone of Strength: Unlike the high-pitched screams from previous Kaiju, Guiron's roar is more like a deep bellow, and he's the first enemy that gives Gamera a true challenge.
- BFS: Guiron's entire head is a massive Absurdly Sharp Blade capable of cutting through almost anything like a hot knife through butter.
- Death by Irony: They're a living blade that can cleanly cut through anything, but they meet their end by being cleanly sliced in half by Gamera.
- Half the Man He Used to Be: How he met his end from Gamera.
- Impossibly Graceful Giant: Despite his size, Guiron is surprisingly agile, capable of doing back-flips with ease to slice his targets.
- Lightning Bruiser: Not only Guiron hits hard and is incredibly agile, he can also tank several blows without damage. It's only when Gamera gets unconventional that Guiron starts taking damage.
- No Mouth: Guiron's mouth is hidden behind a pair of mandibles that lie so seamlessly against the rest of his head blade that it gives the appearance of this.
- Railgun: Guiron's shurikens are reimagined as blades in his spines which are launched from his body in a manner akin to a railgun.
- Rubber Man: A downplayed example, but Guiron can slightly stretch the middle part of his body to extend the reach of his blade.
- Wake-Up Call Boss: The previous three kaiju could injure Gamera but never seemed too serious. Guiron lops off one of Gamera's arms and impales the giant turtle through the chest, nearly killing him all on his own.
Viras
- Adaptational Dye-Job: Unlike the other kaiju, which generally kept a similar shade to their original depictions, this version of Viras is a golden colour rather than pale blue.
- Ancient Evil: As opposed to the other kaiju, Viras was still dormant rather than an egg and reawakened.
- Beast of the Apocalypse: Viras destroyed the ancient civilization and it's predicted if he fully awakened again, he would be capable of wiping out over 99% of the world's population in 40 days.
- Bizarre Alien Biology: Pieces of several Gyaos in containment cubes are dropped all over Viras, and Viras absorbs them, which human characters refer to as him eating them.
- Climax Boss: Viras is the core of the human villains' plan along with Super Gyaos, and they intended to use him to enact their Final Solution plan on the world. Once he's dead, their original plan is almost destroyed, save for one last Gyaos.
- Combat Tentacles: Like his Showa counterpart he has tentacles with teeth in his suction cups.
- Half the Man He Used to Be: Like Guiron, he also meets this from Gamera.
- Person of Mass Destruction: Even by kaiju standards, the sheer amount of damage that Viras is capable of inflicting is immense. It only took it an hour to wipe out the civilization that created it, and it's predicted if left unchecked, Viras is capable of wiping out 99.99972% of the world's population in 40 days.
- Red Baron: The Golden Devil.
- Sealed Evil in a Can: Unlike the other kaiju, who were found as eggs, Viras was found in a mummified state deep underground. It's noted he's unique in that he doesn't actually need Orylium in his body to avoid decaying like the other kaiju do. Being fed Gyaos corpses ends up kickstarting his regeneration and he soon fully awakens again.
- Shock and Awe: Viras can manipulate electromagnetism to conduct powerful electric shocks through its tentacles, fire energy beams, and fly by negating gravity around itself.
S-Gyaos (SPOILERS)
- Acrophobic Bird: After gorging itself on Viras' corpse, S-Gyaos is too large and heavy to fly, instead bellyflopping into the ocean and swimming to the island.
- Big Eater: After awakening from stasis it first eats Emiko and then consumes the entirety of Viras' corpse.
- Breath Weapon: Like its lesser counterparts, the S-Gyaos can fire a beam of red sonic energy from its mouth. Unlike the regular Gyaos it can supercharge this into a Wave-Motion Gun.
- Extra Eyes: Unlike the regular Gyaos, who only possess two eyes, even as an infant the S-Gyaos had three eyes.
- Final Boss: Of the final episode.
- King Mook: It's an even bigger version of a normal Gyaos, with a proportionately stronger sonic beam. It's so big, it can't even fly.
- Mythology Gag: its name, S-Gyaos, is probably a reference to Gyaos' stronger form in the Heisei trilogy, Super Gyaos.
- Spit Out a Shoe: While gorging on Viras' corpse, the S-Gyaos pauses to burp out Emiko's ring, signifying she was eaten entirely bones and all.
- The Virus: The S-Gyaos was modified by the Eustace Foundation's Board of Directors to carry an RNA virus intended to revert Gamera back to factory settings, but it doesn't work for long.
- You Remind Me of X: Right before it devours her, Emiko mentions S-Gyaos reminds her of her Evil Aunt Nora.
Kaiju introduced in GAMERA -Rebirth- code thyrsos (UNMARKED SPOILERS)
Soora
- Bioweapon Beast: Like the rest of the Kaiju
- Mighty Glacier: Much less agile than it's opponent Boora, but has a powerful flame blast
- Mix-and-Match Critter: Looks like a fusion of a whale and a lizard
- Mythology Gag: Greatly resembles a whale, coincidently the starring monster of one of Daei's first attempts at a Kaiju movie
- Playing with Fire: Can burn up it's fat reserves into a highly flammable gas that it unleashes from it's mouth
Baora
- Bat Out of Hell: Take a look at it
- Bioweapon Beast: Like the other monsters
- Fragile Speedster: Can fly circles around Soora, but doesn't survive a single hit from Soora's flame breath
- Mix-and-Match Critter: Looks like a bat but also has a pig-like face
Bodera
- Bioweapon Beast: Like the other monsters. In fact, it's made from an unfinished blueprint
- Face of a Thug: Flat-out horrifying to look at even compared to other Kaiju, but is also the first heroic monster as it stands against the forces of the corrupt elite.
- It Can Think: Possesses a similar intellect to a whale.
- Lightning Bruiser: In addition to it's sheer strength, it's also remarkably fast and tough.
- Precursor Heroes: The first Kaiju to stand against evil monsters
- Red Baron: King of the Underground
Humans
Hiroki "Boco" Wada
Voiced by: Hisako Kanemoto (Japanese), Ryan Bartley (English)
- All-Loving Hero: Boco's big character establishing moment is risking his life to safe a stuck turtle. He even is the only one in the group to want to save Brody and his group, the ones who tormented them and stole their money.
- The Baby of the Bunch: Boco is the smallest of his friend-group, and due to his kindheartedness and naivity is treated by Jun and especially Joe as a kid brother, even though he's the same age as them.
- The Chosen One: Of all the children who come into contact with the Kaiju, Boco's status as a code-holder makes him a person of particular interest to the Eustace Foundation, fostering a strong Psychic Link with Gamera.
- Heroic BSoD: He suffers two.
- When Joe seemingly sacrifices himself by manually launching the escape pod while being left behind.
- When Gamera is on the brink of death after saving Boco and his group from a crashing escape pod.
- Tiger Mom: Boco's mother is obsessed with him getting good grades, nagging him to study instead of going out to play and sending him to a special school, thus separating him from his friends. He tends to ignore her and blow her off.
Satoru "Joe" Matsuda
Voiced by: Yoshitsugu Matsuoka (Japanese), Robbie Daymond (English)
- Children Raise You: Considering his dad is depressed and drinking it seems Joe has to help motivate him to work and eat, along with taking a paperboy job to help support them and doing the cooking for them both.
- Cool Big Sis: Gender-inverted. Due to Boco's immaturity, Joe acts like an overprotective older brother towards him—and to an extent Jun as well—due to not only being the biggest of the three but having once had a little sibling. This causes friction when Boco accuses Joe of treating him like a replacement for his little brother.
- Embarrassing Nickname: His nickname, "Joe", comes from when he stopped to protect Boco from a bully en route to the bathroom and ended up peeing his pants.
- Excellent Judge of Character: He grows increasingly suspicious of the Foundation during episode 4, suspecting that they're really who they claim to be. His suspicions were proven correct by the time episode 5 comes out.
- Go Out with a Smile: In Boco's last glimpse of him as the escape pod falls away from the shuttle, he smiles.
- Heroic Sacrifice: He sacrifices himself to launch the escape pod out of the damaged shuttle, being left behind. However, the post credit scene of the final episode reveals he is still alive.
- Only Sane Man: He's the only one that really worries about the risk of being targeted by kaiju and takes it seriously.
- Parental Neglect: Joe's dad just shut down after his mom and sister died, leading him to drinking a lot to the point where he barely pays any attention to his son.
Jun "Junichi" Ishihara
Voiced by: Aki Toyosaki (Japanese), Abby Trott (English)
- Bunny-Ears Lawyer: Jun is a nerd who obsesses over science fiction conspiracy theories, but is good with tech and knowledgeable about scientific subjects that go over the others' heads.
- Et Tu, Brute?: She was hurt and shocked that Emiko was trying to feed her and her friends to Viras to kill the Earth population that she no longer sees Emiko as a friend when the latter tried to spare her of this account.
- Lady Looks Like a Dude: She's androgynous, has Boyish Short Hair, and is very much a tomboy, leading to Brody assuming she's a boy.
- Shorter Means Smarter: The second-smallest of the kids and not only logical but is tech savvy.
Douglas Ken "Brody" Osborn
Voiced by: Subaru Kimura (Japanese), Sean Chiplock (English)
- Fire-Forged Friends: After a rough start in his Heel–Face Turn and by the final episode, he establishes himself as a friend in Boco's group
- Freudian Excuse: Douglas' father was strict and harsh towards him, and he's been trying his best to live up to his standards and win over his approval as a result. No wonder he was being a Jerkass.
- Heel–Face Turn: He starts off a thuggish, racist bully who terrorizes the local Japanese kids and beats them up if they stand up to him, but after Boco's group saves him from a Gyaos he joins them and mellows out considerably towards them.
- Headbutting Heroes: After his Heel–Face Turn, he and Joe spend several of the earlier episodes at each others' throats.
- "Well Done, Son" Guy: He suffers under a strict and harsh military dad and wants his approval.
James Tazaki
Voiced by: Mamoru Miyano (Japanese), Kaiji Tang (English)
- Butt-Monkey: He doesn't like boats and is claustrophobic. The rough seas in episode 3 have him tossed around and going into a panic about having to board a submarine.
- Child Hater: He doesn't like kids or want to have them - it's why he and his wife divorced - and he tends to be cool at best towards the child protagonists but that doesn't mean he actively wants them harmed.
- Hazy-Feel Turn: Turns to the good side... Sort of, if only to save his own skin. It helps him survive unlike his partner, Emiko.
- No Celebrities Were Harmed: Post credits scene shows he’s become the stetting’s equivalent to Steve Jobs, dressing similarly and releasing a smartphone almost identical to the original iPhone.
- Pragmatic Villainy: When the chips are down... he'd very much like a way to reach the Moon. However... it's a bit ambiguous about whether he was bluffing so Emiko's men wouldn't kill him or genuinely wanted to go along with the destruction of humanity and then realized he didn't have a guaranteed place among the chosen survivors. In the final episode, he thinks it's hopeless to try to heal Gamera and tries to walk away until one of the kids appeals to his sense of self-preservation, saying the Eustace Organization will have him killed.
- Resignations Not Accepted: He tries to leave the organization halfway through the series but is swayed by Emiko asking if he's running away, and later saying that they need him. The kids convince him to not run away and help him in the last episode by asking him if he thinks the Eustace Organization won't hunt him down later, to which Tazaki's decision to stay answers that they would.
- Screw This, I'm Out of Here!: Attempts to pull this numerous times but aircraft either gets destroyed or even shot out of the sky.
Emiko Melchiorri (SPOILERS)
Voiced by: Saori Hayami (Japanese), Suzie Yeung (English)
- Admiring the Abomination: She gushes over Viras in the final few episodes, even as it rampages and devours her staff, and even when about to be eaten by a baby Gyaos she can only express awe towards it.
- Big Bad Friend: Emiko is initially kind towards the children for the first four episodes, befriending Junichi over the latter's insecurity regarding her friendship with the boys. The fifth episode reveals that this was all in order to lull them into a sense of false security, as all along she was planning on feeding them to Viras and using it to wipe out most of humanity. She offers to spare Junichi on account of their "friendship", but when Junichi refuses Emiko coldly orders her to be killed as well.
- Bitch in Sheep's Clothing: She only pretended to be friends with the kids in order to have them be fed to Viras in order to control it, making it clear that everyone other than herself is disposable.
- Dragon-in-Chief: Subverted. She is the one running the Foundation on Earth, ostensibly taking commands from the Board, who are mostly relegated to their moon base and inactive throughout the show. However, she plans on killing and usurping the board for her own ambitions, being a more personable antagonist towards the leads with her betrayal, and comes close to succeeding in her goals... but she is defeated and killed at the start of the finale, leaving the Board as the sole human antagonists for the final episode.
- Even Evil Has Loved Ones: When she calls her aunt to gloat about her impending victory, Emiko flies into a rage when her aunt brings up her mother—accusing her aunt of having usurped leadership of the Melchiorri family by murdering her sister.
- Evil All Along: Over the first four episodes, Emiko is friendly towards the children, going out of her way to support them even when other adults won't give them the time of day, and befriending Junichi... and then Episode 5 reveals she's not only in on the Foundation's plan to cause humanity's extinction using the Kaiju—the only reason she kept them safe and pretended to befriend them being to sacrifice them to Viras—but plans to pull a The Starscream on the board of directors, especially her aunt. Though she does at least offer to spare Junichi on account of their "friendship", when Junichi refuses she coldly consigns her to death as well.
- Evil Cannot Comprehend Good: She thinks that because Junichi is smart and they're "friends", the girl will leave the boys and everyone else she knows behind to be eaten by kaiju, and seems a little hurt when Junichi refuses.
- Face Death with Dignity: Twice. When she sees the flaming carcass of Viras hurtling towards her from the upper atmosphere like a meteorite, she snarks how the kaiju is so loyal that it's returning to them, before calmly brushing it off as a "nuisance". She barely survives the explosive impact, although she's badly injured and devoured by a baby Gyaos shortly after. Right as the Gyaos is about to pounce, Emiko muses how its ugly face reminds her of Aunt Nora.
- Friendless Background: She alludes to this and is quite happy when Junichi offers to be her friend.
- Just Desserts: She is eaten entirely by a baby Gyaos — a fitting end considering that she'd tried to feed the kids to Viras.
- Ms. Fanservice: While on the ship, Emiko decides to go sunbathing, causing Boco, Joe, Brody, and even Junichi to stare at her in awkward fascination.
- No Body Left Behind: All that's left of her is her ring, which the S-Gyaos burps up while consuming Viras' corpse.
- Say My Name: She screams Gamera's name after he kills Viras, thus ruining her plans/agenda.
- The Starscream: She hates her aunt for having murdered her mother to seize control of the family, and plans to do the same to her and the heads by starving them out of their moon base.
- Villainous Breakdown: She loses her cool when Gamera kills Viras, foiling her plans to overthrow her aunt and the rest of the foundation heads.
- Walking Spoiler: Her kind personality hides she is willing to feed the children to a kaiju and use it to cull the Earth's population.
The Eustace Foundation (SPOILERS)
In general
- Ancient Conspiracy: The Kaiju are actually part of a 100,000-year-old plot by the Eustace Foundation as a means of "purifying" the Earth of the majority of humanity. This also doubles as a Corporate Conspiracy as the Eustace Foundation is a huge corporation that's (publicly) dedicated to researching the Kaiju. It's implied that 100,000 years ago, one of the Kaiju devoured a child with a "minus code" that caused them to lose control of it, the subsequent rampage decimating the ancient civilization and forcing them to put the purification plan on hold.
- Big Bad: They're intentionally reviving the kaiju in order to 'purify' the earth. Of them, Nora Melchiorri is the only one that is really fleshed out, though she and her partners appear to have equal power and authority in their operations. Nora's niece, Emiko, is the most active antagonist, operating on the Board's behalf, before attempting to branch out on her own; however, Emiko is killed shortly after her betrayal by a baby Gyaos, leaving her aunt and her partners as the sole antagonists in the finale.
- Didn't See That Coming: As a contingency plan in case the S-Gyaos fell to Gamera, they programmed the S-Gyaos with an RNA virus to undo Gamera's programming to protect. In fact, when they detect an intense energy buildup, they assume the purification has begun, and die completely unaware that Gamera not only resisted the reprogramming, but fired an energy beam all the way to their base on the Moon.
- Hoist by His Own Petard: They attempted to establish a new world order 100,000 years ago by creating kaiju to exterminate most of humanity. Instead, the kaiju turned on them and annihilated their civilization.
- Karmic Death: Attempted to reprogram Gamera to destroy humanity for them, but instead become the only humans in Rebirth that Gamera kills directly when he breaks free of their control.
- Soft-Spoken Sadist: All of them.
- Would Hurt a Child: Designed the kaiju to target children as when they eat children with a specific 'code,' they fall under the Foundation's control.
Prudencio Fortea
Anselm Rybrant
Nora Melchiorri
- Jerkass: She isn't above gloating to Emiko about her mother's death, which to be fair Emiko isn't happy about.
- Sibling Murder: She murdered her sister to seize control of the family
- The Smurfette Principle: She's the only female member of the Eustace Foundation board.
- The Starscream: See Sibling Murder.
Winston Griffith
Characters introduced in GAMERA -Rebirth- code thyrsos (UNMARKED SPOILERS)
Lucius
- Best Served Cold: Fully intends to take revenge on the aristocracy, and is willing to take his time to do so
- Eye Scream: An explosion ripped off a chunk of the skin on his face, along with a glass shard flying into his eye. He wears an eyepatch to cover it up.
Seika
Aldol
Lord Kikurus Teta
- Big Bad: As one of the high ranking nobles running Elistania and the one directly overseeing the creation of the kaiju and proxy wars, he's the highest ranking antagonist in the manga.
