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* {{Jerkass}}: After selling the Nektons a the treasure map, he proceeds to literally sell the Dark Orca crew a second map to the same treasure seconds later, pitting the two families against each other. And once Ant lets it slip that the treasure is a seed bank, Dolos figures out to that its container is made of solid gold and tries to screw over both parties to get it first himself, even knowing that the islanders who need the treasure will go into ruin without it.
to:
* {{Jerkass}}: After selling the Nektons a the treasure map, he proceeds to literally sell the Dark Orca crew a second map to the same treasure seconds later, pitting the two families against each other. And once Ant lets it slip that the treasure is a seed bank, Dolos figures out to that its container is made of solid gold and tries to screw over both parties to get it first himself, even knowing that the islanders who need the treasure will go into ruin without it.
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* AttackAnimal: Owns a large red octopus named Hydra and he treats as a guard dog and dotes on. Hydra even wears a spiked collar to boot.
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* AttackAnimal: Owns a large red octopus named Hydra and that he treats as a guard dog and dotes on. Hydra even wears a spiked collar to boot.
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* DysfunctionalFamily: Hammerhead doesn’t care if his children are hurt while he searches for tresures. The siblings are regularly pitted against each other, sometimes on purpose and other times trough their fathers carelessness.
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* DysfunctionalFamily: Hammerhead doesn’t care if his children are hurt while he searches for tresures. treasures. The siblings are regularly pitted against each other, sometimes on purpose and other times trough through their fathers father's carelessness.
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%%* AnnoyingYoungerSibling: To Finn
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* TheSmurfettePrinciple: The only explicitly female member of the Dark Orca crew (since we're never shown what the rest of Hammerhead's FacelessMooks look like under their diving gear).
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* BunnyEarsLawyer: He's initially taken for a fraud by the Nektons, but while he's a phoney in many respects, the "monsters" he finds and his ability to harm them are quite real. Past the first season, they start viewing him as a legitimate menace, if not necessarily a personal threat.
to:
* BunnyEarsLawyer: He's initially taken for a fraud by the Nektons, but while he's a phoney phony in many respects, the "monsters" he finds and his ability to harm them are quite real. Past the first season, they start viewing him as a legitimate menace, if not necessarily a personal threat.
* AttackAnimal: Owns a large red octopus named Hydra and he treats as a guard dog and dotes on. Hydra even wears a spiked collar to boot.
* {{Jerkass}}: After selling the Nektons a the treasure map, he proceeds to literally sell the Dark Orca crew a second map to the same treasure seconds later, pitting the two families against each other. And once Ant lets it slip that the treasure is a seed bank, Dolos figures out to that its container is made of solid gold and tries to screw over both parties to get it first himself, even knowing that the islanders who need the treasure will go into ruin without it.
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* MeaningfulName: Dolos is the ancient greek god of trickery and deceiving. The name is pretty fitting for a dishonest scammer like him.
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* MeaningfulName: Dolos is the ancient greek Greek god of trickery and deceiving. The name is pretty fitting for a dishonest scammer like him.
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* IronicName: In greek mythology, Alpheus is a river god and a son of Poseidon.
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* IronicName: In greek Greek mythology, Alpheus is a river god and a son of Poseidon.
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[[foldercontrol]]
[[folder:The Nektons]]
!The Nektons as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/nektons.jpg]]
[[caption-width-right:350:L to R: William, Antaeus, Jeffrey (in bowl), Kaiko and Fontaine]]
* AerithAndBob: William and Kaiko are fairly typical names. Antaeus and Fontaine? Much less so.
* AmbiguouslyBrown: WordOfGod says they're mixed race. Promotional interviews about the original graphic novel explicitly stated that William is African and that Kaiko is Japanese, but it's unclear if the same applies here.
* BadassFamily: They are NOT to be messed with.
* BoldExplorer: The entire family is dedicated to exploring the mysteries of the world's oceans. And the Nektons have been doing this for generations.
* CoolBoat: The Nektons have the Aronnax.
* FriendToAllLivingThings: Besides some welding lasers and a collection of high-tech power tools, they possess no weapons and are dedicated to protecting all creatures both human and animal.
* InTheBlood: "My family are explorers. We have been for generations."
* ScienceHero: Dedicated to exploring the mysteries of the world's oceans.
* TheresNoPlaceLikeHome: [[spoiler: This is ultimately the driving force for why the Nektons are always drawn to the ocean. Turns out, the Nektons are a family of Lemurians.]]
!!William Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/william_nekton_animated.png]]
->'''Voiced by:''' Creator/MichaelDobson
* ActionDad: Loving mother and [[BoldExplorer intrepid undersea explorer and adventurer]].
* GeniusBruiser: An oceanographer with the build of a heavyweight boxer.
* PapaWolf: More than once displays his willingness to inflict physical harm on those who threaten his children.
* RealAwardFictionalCharacter: William won Olympic gold medals in swimming.
!!Kaiko Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/kaiko_nekton_animated.png]]
->'''Voiced by:''' Creator/KathleenBarr (Season 1-3); Elfina Luk (Season 4)
* AcePilot: The underwater equivalent of this. Will says she is greatest sub pilot alive and all the evidence supports this. In "The Dark Orca", she discovers she can roll the Aronnax: something no one thought was possible.
* ActionMom: Loving mother and [[BoldExplorer intrepid undersea explorer and adventurer]].
* BadassBookworm: Marine biologist, [[AcePilot sub pilot]], [[WrenchWench mechanic]], and more than capable of handling herself in a fight or any kind of emergency.
* EncyclopaedicKnowledge: Justified as she is a marine biologist. Kaiko is able to identify the species of most seas creatures as soon as she sees them.
* MamaBear: If Fontaine or Ant are in danger, Kaiko will move heaven and earth to save them. And God help anyone or anything that gets in her way. In "Fossil", she faces down a prehistoric crocodile that is threatening her family.
* SpellMyNameWithAnS: If she's of Japanese origin, then her name would normally be romanized as "Keiko."
* WrenchWench: Kaiko is the one keeps the Arronax running.
!!Antaeus "Ant" Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/ant_nekton_animated_5.png]]
->'''Voiced by:''' Creator/VincentTong
* AgentMulder: Ant believes in mermaids and aliens.
%%* AnnoyingYoungerSibling: To Fontaine.
* BrilliantButLazy: Always trying to find a way to avid his chores.
%%* BrotherSisterTeam: With Fontaine
%%* Child Prodigy: Paired with GadgeteerGenius
* TheChosenOne: Nereus [[spoiler:and Proteus]] firmly believe that Antaeus is the one who will reassemble the Efemicrom, and get it to reveal Lemuria's location.
* FoolishSiblingResponsibleSibling: The Foolish Sibling to Fontaine's Responsible Sibling.
* GadgeteerGenius: Enjoys inventing anything from new Knights to portable fishbowls for Jeffrey
* IronicName: In Myth/GreekMythology, Antaeus was a giant who was invincible as long as he stood on the ground. An odd name for an ocean explorer.
%%* {{Keet}}:
* OlderHeroVsYoungerVillain: He has a strong rivalry with Mad Madeline of the Dark Orca crew, who is two years his junior.
* PrecociousCrush: Ant has one on Fontaine's best friend Jess.
* WhyDidItHaveToBeSnakes: In "Fossil", it is revealed that Ant is afraid of bats.
!!Fontaine Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/fontaine_nekton_animated.png]]
->'''Voiced by:''' Creator/AshleighBall (Season 1-3); Creator/ShannonChanKent (Season 4)
* AgentScully: Refuses to accept any of Ant's insane theories for what is going on, and can usually offer a rational alternative.
* AllGirlsWantBadBoys: She clearly has feelings for Smiling Finn, a pirate, who feels the same way.
* BoyishShortHair: When you spend as much time in the water as she does, short hair is way more practical.
%%* BrotherSisterTeam: With Ant
* EncyclopaedicKnowledge: Downplayed compared to Kaiko.
* FoolishSiblingResponsibleSibling: The Responsible Sibling to Ant's Foolish Sibling.
* OnlySaneMan: Is always the first one to point out how insane Ant's latest theory/plan is.
* ShortTeensTallAdults: Fonatine is 15 years old and 149 cm (4’10”) tall. Her mother is 170 cm (5’7”) tall.
* TeenGenius: Paired with EncyclopedicKnowledge. Definitely taks after in mother in terms of intelligence and love of learning.
!!Jeffrey
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/jeffrey_animated.png]]
* ABoyAndHisX: A boy and his fish.
* FreeRangePets: Despite being a fish, Ant has a special machine that allows Jeffrey to explore with the team and the Arronax has water systems so Jeffrey can be in any room he chooses.
* LoyalAnimalCompanion: He is completely loyal to Ant after the latter saved him from being trapped in a fishing line.
%%* TeamPet
[[/folder]]
[[folder:The Guardians]]
!The Guardians as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/guardians_cold_weather.jpg]]
* SecretKeeper: [[spoiler:They know about something evil being contained in Lemuria, and are concerned about what Proteus wants with it.]]
!!Nereus
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/nereus_animated.png]]
->'''Voiced by:''' Creator/LeeTockar
* EccentricMentor: Gives the Nektons clues in the form of riddles rather than being straightforward with them.
* Really700YearsOld: [[spoiler:He's an original Lemurian from when the kingdom fell. In fact, he was the brother of the final queen of the kingdom.]]
* SecretKeeper: He often keeps a lot of things from the Nektons. It can be very vexing for them.
* TechnologicallyBlindElders: For all his wisdom, Nereus is completely lost when it comes to operating technology.
!!Proteus
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/proteus_animated.png]]
->'''voiced by:''' Creator/BrianDrummond
* BigBad: Of the first season, in the second season, he's [[spoiler:demoted to BigBadWannabe]].
[[/folder]]
[[folder:The Dark Orca Crew]]
!The Crew as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/dark_orca.jpg]]
[[caption-width-right:350:L to R: Smiling Finn, Mad Madeline and Captain Hammerhead]]
* TheAllegedCar: The Dark Orca is in a constant state of disrepair, which is commented on in several different episodes.
* EvilCounterpart: To the Nektons. Both are family groups who live on submarines and travel the world's oceans. But while the Nektons try to protect the seas and everything in them, the Dark Orca is looking to plunder them.
* DysfunctionalFamily: Hammerhead doesn’t care if his children are hurt while he searches for tresures. The siblings are regularly pitted against each other, sometimes on purpose and other times trough their fathers carelessness.
* ThePiratesWhoDontDoAnything: They're really only shown attacking shipping in their introductory episode. In subsequent appearances they're mostly just looking for sunken treasure, coming into conflict with the Nektons only because they just want these historical artifacts for their monetary value rather than [[ItBelongsInAMuseum preserving them]].
* ThePsychoRangers: To the Nektons, but in place of a Kaiko or Jeffrey counterpart, they have Danny Boy and some minor goons.
* RockBeatsLaser: In the semi-futuristic setting of the show, their technology is largely garbage, but they're cunning and skilled enough to use it effectively to stay one step ahead of the World Ocean Authority and to keep pace with the Nektons as their most frequent adversaries.
* SubmarinePirates: The Dark Orca alternates between preying on shipping and scavenging the seafloor for lost treasures.
* VillainousLineage:
--> '''Finn''': It's the family business, you know? Some kids become doctors or accountants. I have to become a pirate.
!!Captain Hammerhead
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/hammerhead_animated.png]]
->'''Voiced by:''' Creator/MichaelDobson
* BadBoss: Has no issue with ordering his crew to perform unsurvivable tasks.
* BeardOfEvil: A big bushy black beard, befitting a pirate captain.
* TheCaptain: Of the Dark Orca.
* EvenEvilHasLovedOnes: He clearly cares for his children, even once going out of his way to retrieve a memento of Madeline's late mother. He even weaponizes this, using his concern for Madeline's safety to get her onto the Aronnax in order to steal the Chronicle of the Deep.
* EvilCannotComprehendGood: He doesn't get why the Nektons don't have missiles in their submarine, for without them the Nektons can't attack and steal.
* NamesToRunAwayFromReallyFast: The Hammerhead is species of shark that is a confirmed maneater.
* SeadogBeard: Sports a long bushy beard.
* TalkLikeAPirate: Even though it's a modern setting, Hammerhead speaks with the archetypal West Country accent.
!!Smiling Finn
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/smiling_finn_animated.png]]
->'''Voiced by:''' Creator/SamuelVincent
* BigBrotherInstinct: Towards Madeline.
* FoolishSiblingResponsibleSibling: The Responsible Sibling to Mad Madeline's Foolish Sibling.
* LovableRogue: Charming, slippery, and surprisingly effective.
* OnlySaneMan: Of the Dark Orca Crew.
* ShipTease: Between him and Fontaine Nekton.
* TokenGoodTeammate: He [[spoiler: secretly gave the Nektons back a massive pearl they tried to steal from a giant oyster.]]
* WhiteSheep: Paired with TokenGoodTeammate. Finn doesn't want to be a pirate. He only goes along with the schemes because they're his family.
!!Mad Madeline
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/mad_madeline_animated.png]]
->'''Voiced by:''' Creator/KazumiEvans
%%* AnnoyingYoungerSibling: To Finn
* DaddysLittleVillain: Unlike Finn, Madeline wants to be a pirate just like her father.
* FoolishSiblingResponsibleSibling: The Foolish Sibling to Smiling Finn's Responsible Sibling.
* TomboyWithAGirlyStreak: She loves mermaids
!!Danny Boy
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/danny_boy.jpg]]
->'''Voiced by:''' Creator/BrianDrummond
* BaldOfEvil: He has black hair on the back of his head, but none on top. He's also a pirate.
* BeleagueredAssistant: Usually serves this role to Hammerhead. Frequently given impossible tasks, ordered into life threatening situations, and blamed for things that are actually Hammerhead's fault.
[[/folder]]
[[folder:Other Characters]]
!!Professor Fiction
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/professor_fiction_animated.png]]
->'''Voiced by:''' James Higuchi
* AbsentMindedProfessor: Undeniably brilliant, also undeniably scatterbrained.
* CrazyPrepared: Carries an EMP device with him at all time, just in case.
* {{Keet}}: Rivals Ant for sheer enthusiasm.
* MadScientist: Develops most of the tech used by the Nektons, in addition to being rather eccentric.
!!Devil Daniels
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/lokiscastlecover.jpg]]
->'''Voiced by:''' Creator/TrevorDevall
* BunnyEarsLawyer: He's initially taken for a fraud by the Nektons, but while he's a phoney in many respects, the "monsters" he finds and his ability to harm them are quite real. Past the first season, they start viewing him as a legitimate menace, if not necessarily a personal threat.
* EgomaniacHunter: Styles himself as a hunter of monsters.
* EngineeredHeroics: In a show teeming with aggressive sea monsters, every rare sea beast Daniels encounters is a GentleGiant that he needs to goad into acting antagonistically.
* FakeBrit: Speaks with an RP accent when on-camera, but reverts to an American accent whenever he's alone or [[OohMeAccentsSlipping taken off-guard]].
* GloryHound: Everything he does is to garner more fame for himself.
* HitlerCam: Typically films himself from this angle. When the Nektons finally confront him, he's barely taller than Fontaine.
* KnowNothingKnowItAll: He's clearly only skimmed through ''Literature/MobyDick'' because he doesn't know that Captain Ahab dies at the end and doesn't even know who Herman Melville is.
* MilesGloriosus: Presents himself as a bold and daring adventurer, but literally everything about this persona is fake.
* NerfArm: He's patented a powerful and ironically humane harpoon gun whose discharges are tipped with highly effective suction cups.
* NotSoHarmless: On his lonesome, he managed to sneak up on a giant sea creature and shoot it with a taser dart before the events of the eleventh episode. When the Nektons try to confront him, he quickly steals the Rover for his own use.
* SlaveToPR: Because he thrives on his popularity, the Nektons usually blackmail him into doing what they want by threatening to reveal his true colors to the public.
* VillainousUnderdog: His high-tech yacht is absolutely puny compared to the Aronnax, but his wits and determination make him a wily foe to have.
* TheWorfEffect: After proving himself an effective tracker and hijacker in his initial episode, he is easily subdued and captured by the Dark Orca crew in ''Loki's Castle''.
!!Dolos
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/dolos_051.jpg]]
->'''Voiced by:''' Creator/BrianDrummond
* ChildHater: He finds them annoying. Especially Ant.
* InformationBroker: Will occasionally comes to him for information, as does Captain Hammerhead.
* InsufferableGenius: He's smarter than you, and not afraid to let you know it.
* PlayingBothSides: Has no compunctions about selling a treasure map to multiple parties. He's just doubled his payday.
* MeaningfulName: Dolos is the ancient greek god of trickery and deceiving. The name is pretty fitting for a dishonest scammer like him.
!!Alpheus Benthos
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/alpheus_the_deep_98.jpg]]
->'''Voiced by:''' Creator/AndrewFrancis
* APupilOfMineUntilHeTurnedToEvil: [[spoiler:He was a previous apprentice of Nereus, until he decided he wanted to use the power of Doreus' Scepter to TakeOverTheWorld.]]
* BigBad: Of the second season.
* DirtyCoward: Ambitious, but not very brave.
* EvilPlan: Alpheus' plan is to [[spoiler:obtain the Scepter of Queen Doreus and use it to awaken all the Monumentals, including The Terror, and effectively use them to threaten all the nations of the world into achieving peace.]]
* IronicName: In greek mythology, Alpheus is a river god and a son of Poseidon.
* SmugSnake: Even when his plans go awry, and/or he's outwitted, his expression always has a very smug look about it.
* WellIntentionedExtremist: [[spoiler:He simply wants world peace, but his methods of trying to get it involve awakening a series of giant monsters so they can lay waste to the nations of the world.]]
[[/folder]]
----
[[folder:The Nektons]]
!The Nektons as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/nektons.jpg]]
[[caption-width-right:350:L to R: William, Antaeus, Jeffrey (in bowl), Kaiko and Fontaine]]
* AerithAndBob: William and Kaiko are fairly typical names. Antaeus and Fontaine? Much less so.
* AmbiguouslyBrown: WordOfGod says they're mixed race. Promotional interviews about the original graphic novel explicitly stated that William is African and that Kaiko is Japanese, but it's unclear if the same applies here.
* BadassFamily: They are NOT to be messed with.
* BoldExplorer: The entire family is dedicated to exploring the mysteries of the world's oceans. And the Nektons have been doing this for generations.
* CoolBoat: The Nektons have the Aronnax.
* FriendToAllLivingThings: Besides some welding lasers and a collection of high-tech power tools, they possess no weapons and are dedicated to protecting all creatures both human and animal.
* InTheBlood: "My family are explorers. We have been for generations."
* ScienceHero: Dedicated to exploring the mysteries of the world's oceans.
* TheresNoPlaceLikeHome: [[spoiler: This is ultimately the driving force for why the Nektons are always drawn to the ocean. Turns out, the Nektons are a family of Lemurians.]]
!!William Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/william_nekton_animated.png]]
->'''Voiced by:''' Creator/MichaelDobson
* ActionDad: Loving mother and [[BoldExplorer intrepid undersea explorer and adventurer]].
* GeniusBruiser: An oceanographer with the build of a heavyweight boxer.
* PapaWolf: More than once displays his willingness to inflict physical harm on those who threaten his children.
* RealAwardFictionalCharacter: William won Olympic gold medals in swimming.
!!Kaiko Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/kaiko_nekton_animated.png]]
->'''Voiced by:''' Creator/KathleenBarr (Season 1-3); Elfina Luk (Season 4)
* AcePilot: The underwater equivalent of this. Will says she is greatest sub pilot alive and all the evidence supports this. In "The Dark Orca", she discovers she can roll the Aronnax: something no one thought was possible.
* ActionMom: Loving mother and [[BoldExplorer intrepid undersea explorer and adventurer]].
* BadassBookworm: Marine biologist, [[AcePilot sub pilot]], [[WrenchWench mechanic]], and more than capable of handling herself in a fight or any kind of emergency.
* EncyclopaedicKnowledge: Justified as she is a marine biologist. Kaiko is able to identify the species of most seas creatures as soon as she sees them.
* MamaBear: If Fontaine or Ant are in danger, Kaiko will move heaven and earth to save them. And God help anyone or anything that gets in her way. In "Fossil", she faces down a prehistoric crocodile that is threatening her family.
* SpellMyNameWithAnS: If she's of Japanese origin, then her name would normally be romanized as "Keiko."
* WrenchWench: Kaiko is the one keeps the Arronax running.
!!Antaeus "Ant" Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/ant_nekton_animated_5.png]]
->'''Voiced by:''' Creator/VincentTong
* AgentMulder: Ant believes in mermaids and aliens.
%%* AnnoyingYoungerSibling: To Fontaine.
* BrilliantButLazy: Always trying to find a way to avid his chores.
%%* BrotherSisterTeam: With Fontaine
%%* Child Prodigy: Paired with GadgeteerGenius
* TheChosenOne: Nereus [[spoiler:and Proteus]] firmly believe that Antaeus is the one who will reassemble the Efemicrom, and get it to reveal Lemuria's location.
* FoolishSiblingResponsibleSibling: The Foolish Sibling to Fontaine's Responsible Sibling.
* GadgeteerGenius: Enjoys inventing anything from new Knights to portable fishbowls for Jeffrey
* IronicName: In Myth/GreekMythology, Antaeus was a giant who was invincible as long as he stood on the ground. An odd name for an ocean explorer.
%%* {{Keet}}:
* OlderHeroVsYoungerVillain: He has a strong rivalry with Mad Madeline of the Dark Orca crew, who is two years his junior.
* PrecociousCrush: Ant has one on Fontaine's best friend Jess.
* WhyDidItHaveToBeSnakes: In "Fossil", it is revealed that Ant is afraid of bats.
!!Fontaine Nekton
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/fontaine_nekton_animated.png]]
->'''Voiced by:''' Creator/AshleighBall (Season 1-3); Creator/ShannonChanKent (Season 4)
* AgentScully: Refuses to accept any of Ant's insane theories for what is going on, and can usually offer a rational alternative.
* AllGirlsWantBadBoys: She clearly has feelings for Smiling Finn, a pirate, who feels the same way.
* BoyishShortHair: When you spend as much time in the water as she does, short hair is way more practical.
%%* BrotherSisterTeam: With Ant
* EncyclopaedicKnowledge: Downplayed compared to Kaiko.
* FoolishSiblingResponsibleSibling: The Responsible Sibling to Ant's Foolish Sibling.
* OnlySaneMan: Is always the first one to point out how insane Ant's latest theory/plan is.
* ShortTeensTallAdults: Fonatine is 15 years old and 149 cm (4’10”) tall. Her mother is 170 cm (5’7”) tall.
* TeenGenius: Paired with EncyclopedicKnowledge. Definitely taks after in mother in terms of intelligence and love of learning.
!!Jeffrey
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/jeffrey_animated.png]]
* ABoyAndHisX: A boy and his fish.
* FreeRangePets: Despite being a fish, Ant has a special machine that allows Jeffrey to explore with the team and the Arronax has water systems so Jeffrey can be in any room he chooses.
* LoyalAnimalCompanion: He is completely loyal to Ant after the latter saved him from being trapped in a fishing line.
%%* TeamPet
[[/folder]]
[[folder:The Guardians]]
!The Guardians as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/guardians_cold_weather.jpg]]
* SecretKeeper: [[spoiler:They know about something evil being contained in Lemuria, and are concerned about what Proteus wants with it.]]
!!Nereus
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/nereus_animated.png]]
->'''Voiced by:''' Creator/LeeTockar
* EccentricMentor: Gives the Nektons clues in the form of riddles rather than being straightforward with them.
* Really700YearsOld: [[spoiler:He's an original Lemurian from when the kingdom fell. In fact, he was the brother of the final queen of the kingdom.]]
* SecretKeeper: He often keeps a lot of things from the Nektons. It can be very vexing for them.
* TechnologicallyBlindElders: For all his wisdom, Nereus is completely lost when it comes to operating technology.
!!Proteus
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/proteus_animated.png]]
->'''voiced by:''' Creator/BrianDrummond
* BigBad: Of the first season, in the second season, he's [[spoiler:demoted to BigBadWannabe]].
[[/folder]]
[[folder:The Dark Orca Crew]]
!The Crew as a whole.
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/dark_orca.jpg]]
[[caption-width-right:350:L to R: Smiling Finn, Mad Madeline and Captain Hammerhead]]
* TheAllegedCar: The Dark Orca is in a constant state of disrepair, which is commented on in several different episodes.
* EvilCounterpart: To the Nektons. Both are family groups who live on submarines and travel the world's oceans. But while the Nektons try to protect the seas and everything in them, the Dark Orca is looking to plunder them.
* DysfunctionalFamily: Hammerhead doesn’t care if his children are hurt while he searches for tresures. The siblings are regularly pitted against each other, sometimes on purpose and other times trough their fathers carelessness.
* ThePiratesWhoDontDoAnything: They're really only shown attacking shipping in their introductory episode. In subsequent appearances they're mostly just looking for sunken treasure, coming into conflict with the Nektons only because they just want these historical artifacts for their monetary value rather than [[ItBelongsInAMuseum preserving them]].
* ThePsychoRangers: To the Nektons, but in place of a Kaiko or Jeffrey counterpart, they have Danny Boy and some minor goons.
* RockBeatsLaser: In the semi-futuristic setting of the show, their technology is largely garbage, but they're cunning and skilled enough to use it effectively to stay one step ahead of the World Ocean Authority and to keep pace with the Nektons as their most frequent adversaries.
* SubmarinePirates: The Dark Orca alternates between preying on shipping and scavenging the seafloor for lost treasures.
* VillainousLineage:
--> '''Finn''': It's the family business, you know? Some kids become doctors or accountants. I have to become a pirate.
!!Captain Hammerhead
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/hammerhead_animated.png]]
->'''Voiced by:''' Creator/MichaelDobson
* BadBoss: Has no issue with ordering his crew to perform unsurvivable tasks.
* BeardOfEvil: A big bushy black beard, befitting a pirate captain.
* TheCaptain: Of the Dark Orca.
* EvenEvilHasLovedOnes: He clearly cares for his children, even once going out of his way to retrieve a memento of Madeline's late mother. He even weaponizes this, using his concern for Madeline's safety to get her onto the Aronnax in order to steal the Chronicle of the Deep.
* EvilCannotComprehendGood: He doesn't get why the Nektons don't have missiles in their submarine, for without them the Nektons can't attack and steal.
* NamesToRunAwayFromReallyFast: The Hammerhead is species of shark that is a confirmed maneater.
* SeadogBeard: Sports a long bushy beard.
* TalkLikeAPirate: Even though it's a modern setting, Hammerhead speaks with the archetypal West Country accent.
!!Smiling Finn
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/smiling_finn_animated.png]]
->'''Voiced by:''' Creator/SamuelVincent
* BigBrotherInstinct: Towards Madeline.
* FoolishSiblingResponsibleSibling: The Responsible Sibling to Mad Madeline's Foolish Sibling.
* LovableRogue: Charming, slippery, and surprisingly effective.
* OnlySaneMan: Of the Dark Orca Crew.
* ShipTease: Between him and Fontaine Nekton.
* TokenGoodTeammate: He [[spoiler: secretly gave the Nektons back a massive pearl they tried to steal from a giant oyster.]]
* WhiteSheep: Paired with TokenGoodTeammate. Finn doesn't want to be a pirate. He only goes along with the schemes because they're his family.
!!Mad Madeline
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/mad_madeline_animated.png]]
->'''Voiced by:''' Creator/KazumiEvans
%%* AnnoyingYoungerSibling: To Finn
* DaddysLittleVillain: Unlike Finn, Madeline wants to be a pirate just like her father.
* FoolishSiblingResponsibleSibling: The Foolish Sibling to Smiling Finn's Responsible Sibling.
* TomboyWithAGirlyStreak: She loves mermaids
!!Danny Boy
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/danny_boy.jpg]]
->'''Voiced by:''' Creator/BrianDrummond
* BaldOfEvil: He has black hair on the back of his head, but none on top. He's also a pirate.
* BeleagueredAssistant: Usually serves this role to Hammerhead. Frequently given impossible tasks, ordered into life threatening situations, and blamed for things that are actually Hammerhead's fault.
[[/folder]]
[[folder:Other Characters]]
!!Professor Fiction
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/professor_fiction_animated.png]]
->'''Voiced by:''' James Higuchi
* AbsentMindedProfessor: Undeniably brilliant, also undeniably scatterbrained.
* CrazyPrepared: Carries an EMP device with him at all time, just in case.
* {{Keet}}: Rivals Ant for sheer enthusiasm.
* MadScientist: Develops most of the tech used by the Nektons, in addition to being rather eccentric.
!!Devil Daniels
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/lokiscastlecover.jpg]]
->'''Voiced by:''' Creator/TrevorDevall
* BunnyEarsLawyer: He's initially taken for a fraud by the Nektons, but while he's a phoney in many respects, the "monsters" he finds and his ability to harm them are quite real. Past the first season, they start viewing him as a legitimate menace, if not necessarily a personal threat.
* EgomaniacHunter: Styles himself as a hunter of monsters.
* EngineeredHeroics: In a show teeming with aggressive sea monsters, every rare sea beast Daniels encounters is a GentleGiant that he needs to goad into acting antagonistically.
* FakeBrit: Speaks with an RP accent when on-camera, but reverts to an American accent whenever he's alone or [[OohMeAccentsSlipping taken off-guard]].
* GloryHound: Everything he does is to garner more fame for himself.
* HitlerCam: Typically films himself from this angle. When the Nektons finally confront him, he's barely taller than Fontaine.
* KnowNothingKnowItAll: He's clearly only skimmed through ''Literature/MobyDick'' because he doesn't know that Captain Ahab dies at the end and doesn't even know who Herman Melville is.
* MilesGloriosus: Presents himself as a bold and daring adventurer, but literally everything about this persona is fake.
* NerfArm: He's patented a powerful and ironically humane harpoon gun whose discharges are tipped with highly effective suction cups.
* NotSoHarmless: On his lonesome, he managed to sneak up on a giant sea creature and shoot it with a taser dart before the events of the eleventh episode. When the Nektons try to confront him, he quickly steals the Rover for his own use.
* SlaveToPR: Because he thrives on his popularity, the Nektons usually blackmail him into doing what they want by threatening to reveal his true colors to the public.
* VillainousUnderdog: His high-tech yacht is absolutely puny compared to the Aronnax, but his wits and determination make him a wily foe to have.
* TheWorfEffect: After proving himself an effective tracker and hijacker in his initial episode, he is easily subdued and captured by the Dark Orca crew in ''Loki's Castle''.
!!Dolos
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/dolos_051.jpg]]
->'''Voiced by:''' Creator/BrianDrummond
* ChildHater: He finds them annoying. Especially Ant.
* InformationBroker: Will occasionally comes to him for information, as does Captain Hammerhead.
* InsufferableGenius: He's smarter than you, and not afraid to let you know it.
* PlayingBothSides: Has no compunctions about selling a treasure map to multiple parties. He's just doubled his payday.
* MeaningfulName: Dolos is the ancient greek god of trickery and deceiving. The name is pretty fitting for a dishonest scammer like him.
!!Alpheus Benthos
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/alpheus_the_deep_98.jpg]]
->'''Voiced by:''' Creator/AndrewFrancis
* APupilOfMineUntilHeTurnedToEvil: [[spoiler:He was a previous apprentice of Nereus, until he decided he wanted to use the power of Doreus' Scepter to TakeOverTheWorld.]]
* BigBad: Of the second season.
* DirtyCoward: Ambitious, but not very brave.
* EvilPlan: Alpheus' plan is to [[spoiler:obtain the Scepter of Queen Doreus and use it to awaken all the Monumentals, including The Terror, and effectively use them to threaten all the nations of the world into achieving peace.]]
* IronicName: In greek mythology, Alpheus is a river god and a son of Poseidon.
* SmugSnake: Even when his plans go awry, and/or he's outwitted, his expression always has a very smug look about it.
* WellIntentionedExtremist: [[spoiler:He simply wants world peace, but his methods of trying to get it involve awakening a series of giant monsters so they can lay waste to the nations of the world.]]
[[/folder]]
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