Affirmative Action Legacy: Percy, Annabeth, and Jason are white, Piper is Native American, Frank is Chinese-Canadian, Hazel is black, and Leo is Latino. This is in contrast with the previous series when nearly all the characters were Caucasian.
True Companions / Fire-Forged Friends: Over the course of the series, they slowly, grudgingly grow into this. This is in full force by the end of the fourth book, where they'd willingly risk their lives for another member of The Team.
Perseus "Percy" Jackson
"Only a thousand times? Oh, good...I thought we were in trouble."
Son of the Greek god Poseidon and Sally Jackson and protagonist of the previous series. Percy is one of two titular "lost heroes" for the first book, but he's back in the second, amnesiac and running from monsters. He is brought by Hera/Juno to the Roman Camp, Camp Jupiter, and realizes that his destiny is far beyond being the half-blood mentioned in the last Great Prophecy.Having just gone through five books' worth of Character Development and combat experience, Percy is more mature than he was in the previous series. He is also far more dangerous in combat, being an unpredictable, veritable One-Man Army. He easily befriends the rest of the Seven, despite a few clashes with fellow ace Jason. However, his Fatal Flaw from the previous series — personal loyalty — is still in play, with Mars mentioning that it would greatly hinder the Seven's quest to save the world.As in the previous series, Percy's main weapons are Riptide, his Celestial Bronze sword (formerly owned by Hercules), and his ability to command water and all the Combo Platter Powers that come with this (see below).
The Ace: At first, he was presented as this to both the new heroes, who either heard of his greatness (Piper, Jason, and Leo) or experienced his combat prowess firsthand (Frank, Hazel). Also on a meta level to the audience, who know of his five books' worth of Character Development and badassery increase. This is increasingly subverted as the books go on, however, especially in The House of Hades.
Broken Ace: His guilt and insecurity about the price of reaching his current status come to a head in The House of Hades.
Ambadassador: He was memory-wiped and sent to Camp Jupiter as part of Hera's plan to get the rival camps to trust each other through an "exchange of leaders," trading places with Jason. He was chosen because of his power and general badassery.
Amnesiac Hero: Along with Jason, as part of Hera's plan, he doesn't remember anything.
Amnesiac Lover: At the beginning of The Son of Neptune, the only thing he remembers is Annabeth's name. He gets better.
Badass: So far, the only demigod to basically fight and beat a Giant completely unaided. Sure, there was a god there, but come on. The god in question didn't help at all. note Percy uses the disembodied stone head of the Roman God Terminus to smash in said giants' face.
Badass Boast: Percy was rather fond of these during the first series, and the trait carries on here. Two particularly memorable ones during The Son of Neptune were:
Percy to Polybotes, “You. Me. To the finish.”
Percy: Twelfth legion FULMINATA.
The Twelfth Legion Eagle he was holding then shot out a thousand blasts of lightning that basically annihilated the Giants' entire center line due to Percy's willpower. BAD ASS.
Badass in Distress: Gets taken from Camp Half-Blood and is missing for the entirety of The Lost Hero.
Brought Down to Badass: In the Son Of Neptune, he loses the “Curse Of Achilles”. This doesn’t stop him from being a Grade A asskicker and having all his abilities as son of Poseidon under his belt.
Big Brother Instinct/A Father to His Men: As in the original series, Percy understands how much more powerful he is than the average demigod, and he is entirely unafraid to use that power to take on entire armies to save his friends and allies.
Big Brother Mentor: To Hazel and Frank, who are far more inexperienced than he is in Son of Neptune.
Fight Magnet: As are all Demigods, though being the son of one of the Big Three, the monsters are attracted to him more than most.
Figure It Out Yourself: When searching for Camp Jupiter, Lupa can't tell him where he's going — he has to find and get there himself.
The Heart: What Hera/Juno intends him to be for the Seven. The tired phrase about being glue even gets brought up. In The House of Hades, the effects of him not being there are clearly felt among the other characters.
History Repeats: As in the previous series, Percy's deeds are mirroring those of Herakles, Odysseus, and other mythical heroes.
Homeless Hero: Searching for the Roman camp at the start of Son of Neptune.
Humble Hero: Despite saving the world less than a year previous, he doesn't make a big deal out of it. Lampshaded by Frank and Reyna.
Idiot Ball: When Percy forgets the supplies back in the boat and has to go back for them, allowing the karpoi grain demon things to kidnap Hazel. He even lampshades it.
Indy Ploy: His preferred combat strategy is making things up as he goes along, in stark contrast toAnnabeth.
Invincible Hero: Has shades of this, even after losing the Curse of Achilles. He's so powerful that Chrysaor is the only person able to go toe-to-toe with him under normal circumstances. Subverted the further he and Annabeth go into Tartarus, where the stakes just get higher and higher and the opponents get more and more powerful. The ONLY reason they survive is that they have a Titan AND a Giant to help them out.
Living Emotional Crutch: To Annabeth. Finding him is her motivation throughout the first book. Taken to the extreme when both of them are stuck in Tartarus, having only each other to depend on physically, mentally, and emotionally.
Magnetic Hero: Why Juno picks him as one of the seven. He is unfailingly loyal and inspires loyalty in others.
Nice Guy: He's all-around a pleasant, supportive, patient, loyal person.
Obfuscating Stupidity: Percy is smart, it's just that his recklessness and impulsiveness overshadow this, making him look dumb.
Oblivious to Love: As of The House of Hades, he's completely unaware of Nico's feelings for him. It takes him a few moments to catch on to the meaning of Reyna's words to him in Son of Neptune, in which she basically offers becoming a Ruling Couple with her.
Undying Loyalty: His Fatal Flaw from the previous series appears, downplayed, in the third and fourth books: He falls into Tartarus with Annabeth instead of letting her fall by herself. Later, when someone has to hold the elevator button for the Doors of Death and Bob is too incapacitated trying to save his and Annabeth's asses, Percy tries to get Annabeth to go on without him so he can at least die with Bob. Annabeth is having none of it.
Worf Had The Flu: He is the most powerful of the Seven. The only person who can take him in a straight fight in the entire series is Chrysaor, and he is a son of Poseidon himself.
Why Did It Have to Be Snakes?: Or rather, airplanes. In Son of Neptune, Percy quickly decides he would rather be driving or running from Laistrygonians and heading towards Alaska on the ground, than flying far out of their reach in an airplane. Not that he has much choice in the matter. This is carried over from the previous series, where Percy doesn't want to ride on planes because Zeus might smite him, as a son of Poseidon, for moving in his domain.
You Are Worth Hell: Chooses to fall into Tartarus with Annabeth rather than lose her again.
Percy: We're staying together. You're not getting away from me. Never again.
"The first lesson every child of Athena learned: Mom was the best at everything, and you should never, ever suggest otherwise."
Daughter of Athena and Frederick Chase and heroine of the last series. Following Percy's disappearance prior to the series, Annabeth struggles to balance searching for him, being head counselor of the Athena cabin, holding the rest of Camp Half-Blood together, and undertaking the task presented to her in the previous series of redesigning Olympus. As such, she's mostly out of the picture for the first two books beyond briefly mentoring our new protagonists, but returns in the third, with a divine quest from her mother on her hands — to find the Athena Parthenos and return it to the gods, at whatever cost.Annabeth is stern and strict, but ultimately deeply caring and loyal. As one of the most experienced on the team, she serves as an adviser and Cool Big Sis to the more inexperienced heroes.As a child of Athena, Annabeth is gifted with divine intellect and a natural talent towards strategy. Despite not having any superpowers useful in battle, she is still a competent warrior, fighting with the Celestial Bronze knife given to her by Luke Castellan prior to the previous series.
Academic Athlete: Spends ninety percent of her time either designing buildings for Olympus, being a straight-A student, or fighting tons of Greek monsters.
Action Girl: Even with no special powers other than her wits to aid her, Annabeth is quite the terror with a dagger.
Awesomeness by Analysis: Outwits the ghosts of Mithras's followers just by making observations about the information about their worship decorating the cavern walls.
Badass: She proves herself to be a competent fighter on more than one occasion, and accomplishes a lot even outside of combat. A shining example is how she defeats Arachne, all by herself, with nothing but her wits and a modified Scheherezade Gambit.
Badass Bookworm: As a daughter of Athena, she loves knowledge, and is frequently seen with some sort of reading material.
Beauty Is Never Tarnished: Despite all the hell they go through in the fourth book, Percy continuously describes her as beautiful, though this could be justified by his bias because of being her boyfriend.
Cool Big Sis: To Piper, being the older and more experienced Greek demigod. To Frank as well, in The House of Hades he remembers her being kind, helpful, and patient towards him. As the second best strategist on the team, he looks up to her.
Cool Sword: Gets a sword made from a drakon's bone in The House of Hades after she loses her knife.
Knife Nut: Still uses the knife Luke gave her. She loses it in Tartarus, much to her chagrin, but gets a Cool Sword instead.
Living Emotional Crutch: To Percy. Finding him is her motivation throughout the first book. Taken to the extreme when both of them are stuck in Tartarus, having only each other to depend on physically, mentally, and emotionally.
Out of Focus: In the first two books, since she's not part of the Power Trio in either one (Jason, Piper, and Leo in the first, and Percy, Hazel, and Frank in the second). Averted in the third, where she provides one of the four viewpoints, and who's subplot gives the third book its name. In addition, much of the fourth book is about the Seven struggling to get her and Percy out of Tartarus.
Red Herring: In The House of Hades, the reader is initially led to believe that she's the one Nico has a crush on. Then when Cupid shows up, it turns out to be Percy, not her.
Reunion Kiss: With Percy, and in front of a huge crowd of potential enemy forces, no less. Quickly turned into an emotionally-charged judo-flip into the stone pavement, but her boyfriend takes it in stride. He missed her too, after all.
You Are Worth Hell: Percy could've saved himself if he'd let her fall, but accompanies her into Tartarus anyway. She's painfully aware of this in The House of Hades, and briefly thinks that if he died, it would be her fault.
"I’m the son of Jupiter! I’m a child of Rome, consul to demigods, praetor of the First Legion. I slew the Trojan sea monster, I topped the black throne of Kronos, and destroyed the Titan Krios with my own hands. And now I’m going to to destroy you, Porphyrion, and feed you to your own wolves."
Jason is the first protagonist introduced in The Lost Hero, on a school bus with his friend Leo and girlfriend Piper — except he doesn't remember either of them, or anything, really. Some mishaps later, in which Jason reveals himself to be a good fighter despite not remembering anything, Gleeson Hedge, Annabeth, and Butch successfully deliver the three of them to Camp Half-Blood, with the revelation that the three of them are demigods.Jason is claimed by Zeus, and leads a quest to rescue the goddess Hera. Along the way it's revealed that he's the younger brother to Thalia Grace, now leader of the Hunters of Artemis, and is actually the son of Jupiter, Zeus's Roman aspect (which explains the Latin and the Imperial Gold weapon). And most importantly, he learns that he's Hera's Roman representative to the Greek camp — like Percy is the Greek representative to the Roman camp, of which Jason was former praetor of.Having been raised Roman, Jason is serious and a natural leader, although he does have his moments of good humor. However, he does struggle with the pressure of leading sometimes, being very critical of himself every time he makes a mistake. Over the course of the series he becomes less aloof, more willing to open up, and being more comfortable with himself and others.As the son of Jupiter, he's blessed with the powers you'd expect the son of the lord of the sky to have — he can control wind (and can fly as a result of this) and lightning (as well as the weather if he tries hard enough). He fights with Ivlivs, an Imperial gold coin that can change into a sword or a spear depending on which face it lands on, and later gains a gladius formerly owned by Hera at the end of the first book.
The Ace: Hazel refers to him as Camp Jupiter's "golden boy."
Broken Ace: In The House Of Hades. He's very hard on himself and can find it difficult to connect to people, but he's getting there.
Ambadassador: He was switched with Percy, memory-wiped, and sent to Camp Half-Blood as part of Hera's plan to get the rival camps to trust each other through an "exchange of leaders."
Amnesiac Hero: Got memory-jacked by Juno in order to set up a huge scheme to get the two camps cooperating. Half his motivation to help Camp Half-Blood was to find Hera and get his memories back.
Amnesiac Lover: Averted. Jason quickly reciprocates Piper's feelings, but he doesn't want to lead her on when he isn't entirely sure how he feels about her (first because of his amnesia, then because it turns out they were never dating in the first place, and then because of Reyna). As of the first chapter of Mark of Athena, he seems to have gotten together with Piper in the time between The Lost Hero and The Son of Neptune.
Badass: He took on Enceladus and won. What more needs to be said ?
Big Brother Instinct: When he finds out that Nico had/has a crush on Percy, he takes it upon himself to defend the kid whenever another group member gives him a hard time or says anything derogatory about him.
Also his reaction when the group reunites with Leo midway through the fourth book: Jason immediately realizes that something is wrong with his friend and asks if he's alright.
Blow You Away: His dad's powers give him the ability to control wind.
To Percy. They're both The Ace and natural leaders, but Jason is comparatively straight-laced and rigid where Percy is free-spirited rebellious thanks to their different camps and godly parents. They even look very different, with green-eyed, dark-haired Percy and blond-haired, blue-eyed Jason.
Hero of Another Story: He was the champion of Rome during the Titan Wars and probably had gone on many epic adventures as Percy and Co. did. Unfortunately, this makes Jason something of an Informed Ability hero.
Human Mom, Non-human Dad: His mother is described in the original series as an eighties starlet with a poofy hairdo. His father, of course, is Jupiter.
Hunk: His handsome face and muscular body are given much attention (usually by Piper).
Lightning Can Do Anything: Normally he ricochets it off his sword or javelin at the intended target. Sometimes works too well, since Achelous took this card off the table, as zapping him in the river would also have meant frying Piper.
Long-Lost Relative: To Thalia, his older sister. He disappeared when he was two, and they don't meet again until the events of The Lost Hero.
Mysterious Past: In the first book. A new kid who calls all the gods by their Roman names, has a weapon that can slay monsters that's gold instead of bronze, knows how to fight really well and has a strange Roman motto with tick marks burned into his arm? Yeah, something's off.
New Transfer Student: Jason is technically one at the Wilderness School. The Mist creates fake memories for everybody so they think he'd been there for months already.
Nice Guy: Doesn't ever get mad when things don't go his way. Being positive comes naturally to him.
Remember the New Guy: Thalia didn't mention having a brother during the previous quintet — however, it's justified in The Lost Hero that his disappearance not only would have put the Roman-Greek split in jeopardy, but was quite traumatic for Thalia.
Secret Keeper: As of The House of Hades, he's the only person other than Nico himself to know about Nico's crush on Percy.
Shock and Awe: Having lightning powers, while draining, is definitely an impressive trump card.
Straight Man: Because of his seriousness, he's quite deadpan.
You Can't Go Home Again / I Choose to Stay: Even the undead legions in Epirus recognize his subconscious desire to stay at Camp Half-Blood, and thus refuse to recognize him as a praetor. He realizes it himself.
"Being a hero doesn't mean you're invincible; it means you're brave enough to stand up and do what's needed."
Piper is the beauteous daughter of Aphrodite and A-list actor Tristan McLean. Her dad's job being what it is, she doesn't get to spend much time with him, much to both their chagrin. She also doesn't have plenty of friends at school due to being a Cool Loser, and takes solace in Jason and Leo's company. She's understandably very shocked that she, Jason, and Leo only thought they were friends due to the Mist tricking them into thinking they were. Upon arriving at Camp Half-Blood Piper is claimed by her mother and immediately clashes with resident Alpha Bitch and Silena Beauregard's successor, counselor Drew Tanaka. She despises fashion magazines, skirts, makeup, and other stereotypically girly characteristics shared by her siblings, leading her to feel out of place.Because of her lonely background, Piper is fiercely protective of those close to her, and is very possessive over Jason. She's also insecure about their relationship and her standing among the Seven. However, Piper is willing to stand up to those who mistreat others, and is more than willing to stick her neck out for the rest of the team. She also displays remarkable empathy and is good at reading people. She slowly grows more confident in herself and in her powers over the course of the series.Piper wields Katoptris, a ceremonial dagger once held by Helen of Troy. It shows her visions of the future and occasionally possibilities. As a daughter of Aphrodite, Piper is not that great in a fight — however, she's also blessed with the very rare power of charmspeaking, which allows her to command people to do what she wants through her Compelling Voice. More than once, this is extremely useful to our heroes.
Action Girl: Her only power is charmspeaking, but its powerful enough to daze enemies, knock people asleep, or reverse a tree's growth. And with her dagger? The giant she saved Leo from won't be messing with anyone soon.
In the fourth book, Jason mentions she's been taking swordfighting lessons from Hazel.
The Chick: Being the daughter of Aphrodite, when sometimes she thinks of charmspeaking as nothing more than having a "pretty voice", and a dagger that's not really meant for combat? Piper sometimes feels like she falls into this when it comes to the seven.
Cool Loser: While at school, she has all of two friends and is shunned despite her beauty and personality.
Leo: ...if those girls found out the truth about her dad, they'd all be bowing down to her screaming, 'We're not worthy!'.
Conflicting Loyalty: When her father gets captured for most of the first book, she is torn between saving him (which requires pledging allegiance to Gaea) and risk his life to save the world.
Fake Memories: Her relationship with Jason was thanks to Mist manipulation.
First Girl Wins: Introduced as the first person Jason meets on the bus and his girlfriend. It turns out they weren't dating to begin with and it was all just fabricated memories of the Mist, but over the course of the first book they have genuinely grown to have feelings for each other. Despite Jason remembering a girl he was close to back in Camp Jupiter, Reyna, he's gotten together with Piper in the time between the two books.
Heart Is an Awesome Power: Ratchets her use of her Charmspeak up to awesome levels in The House of Hades, where she uses it to defeat Zethes, Calais and Khione. Said defeat included using Charmspeak to power up the deactivated Festus.
Knife Nut: Wields Katoptris, a dagger once held by the Helen of Troy. It can see the future. It was used as a ceremonial weapon, although it can still kick monster ass.
Like Brother and Sister: Leo's the annoying little brother she never had. She'll still kill even a giant if they mess with him, though.
The Load: She feels like this among the Seven, being one of two members of the team without powers directly useful in physical combat — the other is Annabeth, who more than makes up for it with smarts and combat experience. Then she learns she can use her charmspeak in truly powerful ways.
"Piper had a new entry in her top-ten list of Times Piper Felt Useless. Fighting Shrimpzilla with a dagger and a pretty voice? Not so effective."
Lonely Rich Kid: Her classmates don't know about her movie star father, and she's shunned because she's "different." Hence her fear and possessiveness over Jason.
Love Hurts: Finding out your boyfriend has amnesia and that he was never really your boyfriend in the first place is a lot to take in.
Plucky Girl: Piper always remains positive despite all the troubles she goes through as part of the Seven.
Real Women Never Wear Dresses: She seems to have ingrained this into her mentality — she expresses disdain for her more stereotypically feminine mother and siblings and their corresponding ineffectiveness in battle.
Second Love: May be this to Jason, depending on just how close Jason and Reyna were before he was memory-wiped.
The Power of Love: Her voice is enough to revive Jason even after his brain's been fried by Hera/Juno's true form.
Seer: By looking into her dagger like a looking glass. Most of the time it shows her the most horrible parts of her present and future. At one point she wonders how Helen of Troy stayed sane with it...and then realizes that she probably didn't.
Spoiled Sweet: Is the daughter of famous actor Tristan McLean and isn't very spoiled, other than her justified desire to spend some quality time (that is, longer than five minutes) with said busy parent without any interruptions.
Sticky Fingers: She's a kleptomaniac on record — however, this was only to get attention, and she wasn't consciously stealing, just using her charmspeak.
Tsundere: Type B. She's usually pretty nice, but can be snappy.
Two Girls to a Team: After Annabeth falls into Tartarus with Percy at the end of Mark of Athena, she and Hazel are the only girls on the Argo II for most of The House of Hades. They end up bonding over this.
Unnecessary Makeover: An in-universe example according to Jason — she was already lovely before Aphrodite's claiming gave her a makeover.
The Unfavourite: She feels like she's become this to Aphrodite after hooking up with Jason, because having successfully become the girlfriend of the guy she's in love with, she's become less interesting as a person to her mother (who outright says that she thinks of the Seven as stories, as opposed to actual people).
Well Done Daughter Girl: Rarely got to spend any real time with her dad. She stole things to get his attention, and has a game that they play in place of bonding, initially.
What Would X Do?: After Annabeth falls into Tartarus with Percy, Piper finds herself wondering what Annabeth would do in her situation of defeating Khione, Zethes, and Cal.
"Delaying death is my favorite hobby."
The son of Hephaestus and mechanic Esperanza Valdez, Leo had a happy childhood with his mother until her death. He is introduced as being Jason's best friend and Bromantic Foil. He is ecstatic at the discovery that he is a son of Hephaestus, and takes great delight in the camp machinery. He's the one that manages to fix Festus the bronze dragon (from the ancillary story The Bronze Dragon) despite it going haywire after Charles Beckendorf's death, and it's what he, Jason, and Piper ride on the quest to rescue Hera. Later, he is tasked with building the Argo II, a flying trireme that will be the Seven's main vehicle for their journey to topple Gaea.Leo is wiry, funny, energetic, immature, and upbeat. He has a tendency to fall in love fleetingly with any beautiful girl that crosses his eye. However he's also deeply insecure, stemming from his own past. Its implied he's not really good with people due to, like his father, being frustrated that they aren't as simple as machines, and even his own sense of humor is tied to his lack of self-worth — he cracks jokes to not be overwhelmed by the negativity. Although most of the time his jokes are taken in stride, they can hurt the more sensitive like Frank and Nico, and part of Leo's Character Development is letting go of his past, maturing, and learning to fight alongside his teammates.As a son of Hephaestus Leo is naturally extremely gifted with machines, moreso than his siblings. He also has a magical toolbelt that can procure anything one might find in a garage (even breath mints!). He is also gifted with the very rare ability to command fire, an ability that hasn't been seen in a century, but something he's wary about using due to his Dark and Troubled Past.
All Girls Want Bad Boys: Mocked with Narcissus's nymphs — he pretends to be a loud and obnoxious "bad boy" who thinks he's better than Narcissus to distract him and the nymphs from noticing Hazel stealing the bronze.
Alone Among the Couples: In book three, where everyone else is paired off. That said, Leo has crucial ties to all three of the couples. **
Badass: His powerful fire abilities and great mechanical genius easily qualify him for this trope.
Bag of Holding: Leo's magic toolbelt. It can hold anything that fits into his pockets, and can produce anything that would reasonably be found inside of a garage.
Beware the Nice Ones: Leo is the most friendly and cheerful of our new characters. He is also one of the most dangerous, having powers he can't always control.
Bromantic Foil: Jason's best friend. He's also louder, funnier, wirier, and more into girls.
Calling the Old Man Out: He talks back to his dad in a way that not even Percy Jackson would've, and he doesn't even get struck down- if anything, it actually gets him respect.
Casanova Wannabe: Leo is fond of hitting on pretty girls out of his league. In The House of Hades, he laments not being as hunky as Jason, because that would have gotten him out of his current situation.
Dark and Troubled Past: Apparently accidentally killed his mother with his fire powers. He also had a divine grandma who (sort of) tried to kill him several times. Not to mention Gaea messing with his head.
Demonic Possession: He gets possessed by an eidolon, which makes him open fire from the Argo II onto New Rome and incurs the fury of the Romans against the Greeks.
The Engineer: Like all of Hephaestus's kids, he's good at building and fixing, but Leo's an especially prodigious one. He kept Festus going and built the Argo II.
Everyone Knows Morse: Leo learned it from his mother as they used it to keep track of each other when at her workplace. Only Leo is shown to know it and it doesn't serve any real plot relevant purpose except when Festus gives Leo a final message.
First Kiss: For all of Leo's flirting, he's never been kissed until he leaves Calypso's island.
Gadgeteer Genius: Even when Leo's doing nothing in particular, he still can fashion incredible machines. When he puts his mind to something, he can make automatons or huge warships.
Grease Monkey: As the team mechanic, he's always running around greased due to constantly fixing things.
Heartbroken Badass: Becomes this around three quarters of the way through The House of Hades after he ends up on Calypso's island, falls in love with her, and then is forced to abandon her. He is noticeably different for the rest of the book, less twitchy, more serious, and well, in the words of Jason:
Identical Grandson: He resembles his great-grandfather, Sammy, so much that Percy and Hazel think he's actually Sammy when they first get a look at him.
In Love with Love: Leo pretty much falls for any girl who's out of his league, namely Khione and Thalia. Though, he gets over Khione rather quickly when she reveals herself to be a villain.
Infinite Supplies: That toolbelt of his is enchanted to "contain anything that could be found in a garage", which includes everything from small tools and materials, to a sledgehammer, to taco ingredients, to breath mints.
Improbable Aiming Skills: Hits an elevator button from thirty feet away by chucking a screwdriver like a throwing knife.
Keet: He's fun-loving and always full of energy and good times. He's got so much nervous energy that he's got to constantly keep his hands moving. It has even been noted that his ADHD is still exceptional, even for a demigod.
ALL DA LADIES LUV LEO
Man on Fire: The first child of Hephaestus to be born in decades with the ability to summon fire. It only makes Leo more nervous since not only does he have a fifty percent chance of destroying the world, but he could also very easily kill another member of the seven.
Sad Clown: He smiles and jokes since its easier than being sad about things he can't change or that scare him. Subverted, since Jason notes how important Leo's sense of humor is to team morale.
Self-Made Orphan: This is the reason why he is initially afraid of his fire powers: when he was a kid, Gaia visited the workshop where he and his single mother were, with the firm intention of preventing Leo from becoming a powerful enemy; he used his powers to try and protect his mother, but lost control and started a fire, accidentally killing her instead. He still has his father, but since he's the god Hephaestus whom he only met at 15...
She Is Not My Girlfriend: Says this almost word-for-word when Calypso assumes that Reyna is the Penelope to his Odysseus (or Annabeth to his Percy, or Elizabeth to his Sir Francis Drake).
Stepford Smiler: Type A. He's upbeat and friendly on the outside, but melancholy and lonely on the inside.
Team Chef: Able to whip up pretty boss veggie tacos anywhere and anytime you could possibly want them. Just ask Piper or Jason.
Trickster Archetype: He's described as having a devilish smile that makes people go "Don't even think about it!" Probably for good reason.
Tsundere: Type B, at least towards Calypso when he's marooned on her island.
Utility Belt: A thick leather tool belt with a LOT of pockets. Contains all sorts of tools and switches, bits and bobs, odds and ends, oh, and a sledgehammer.
"Tactics. That’s my gift from Mars. A battle can be won before it’s ever fought by choosing the right ground."
Frank is the son of Mars and soldier Emily Zhang. On his mother's side, he is descended from Poseidon through one of the Argonauts. Due to this powerful legacy and the subsequent gifts he receives thanks to them, the gods (specifically Juno), decide to balance this out by tying his life to a piece of wood — should the wood ever burn out, Frank dies.After his mother's death in Afghanistan he is sent to Camp Jupiter after spending some time with his wealthy grandmother. After Percy's arrival he is claimed as a son of Mars, much to his disdain — as tender, pacifistic Frank couldn't be more different from his militaristic, warlike siblings. Frank is designated leader of the quest to rescue Thanatos, and chooses Hazel and Frank to go with him. This quest brings him and Hazel closer together, and they are dating by the end of the second book.Frank is at first shy and clumsy due to his own insecurity, but later grows more confident and sure of himself and his talents over the course of the series. Interestingly, because Frank's life is tied to a stick, he is the only one of the Seven Gaea is incapable of manipulating.Due to his heritage, Frank has several powers and talents. Being the son of Mars, he has a remarkable talent for tactics and strategy, as well as being excellent in physical combat and being a natural-born battle commander. He's also very talented with a bow and arrow. Thanks to being descended from Periclymenus, the Zhang family gift — the power to shapeshift into any animal — was passed down to him as well.
Achilles' Heel: His life force is bound to a stick of wood. If/when it burns up, Frank will die.
Everyone Is Related: He’s a descendant of Poseidon on his mother’s side, making him a distant relative of Percy.
Field Promotion: Jason promotes him to praetor in the midst of a battle in the fourth book.
Hearing Voices: In The House of Hades it's revealed Ares's and Mars's voices have been bickering in his head for a while, and is a major factor towards his hostility towards Leo. Given how different those two facets of his father are, it can't have been pretty.
I Got You Covered: Frank to Hazel and Percy while they were escaping from the Zhang residence. Percy to Frank in Alcyoneus lair.
Immune to Fate: Mentioned as why Gaea is willing to kill him, she can't predict his future, or manipulate him emotionally. His freedom of choice and ability to change also connects to his unique talent, shapeshifting. Notably, he IS cursed with a short life, as a price for his many powers; it's just no one can predict the how and when.
One-Man Army: Was granted the blessing of Mars in the fourth book, temporarily turning him into one of these.
Sitcom Archnemesis: With Leo, though it's kind of understandable as Frank's life is tied to a stick and Leo has hard-to-control fire powers. They seem to be moving past it when Leo gives him a fireproof pouch to carry his firewood in.
Took a Level in Badass: In The House of Hades after managing to defeat every katobleps in Venice, getting taller and buffer. Hazel notes that something's different about his personality, though. And later again when Jason emergency-promotes him to Praetor, giving him command of a full Epirus ghostly legion.
He worries that his drastic change in appearance and demeanor will make the others treat him differently. Hazel does not mind.
"I'm not choosing one of your paths. I'm making my own."
Hazel's past is a long one. A daughter of Pluto, she was born in 1920's New Orleans to Marie Levesque, a struggling fortune teller. Marie had asked Pluto to give her all the riches of the earth, and Pluto had obliged by giving their daughter the power to summon gemstones. However, the gems she summoned were cursed, leading their buyers to horrible fates, and she and Marie ended up none the better. Because of this she was ostracized at school save for her sole friend Sammy, whom she lost when her mother moved them to Alaska, beyond the power of the gods. There, Gaea forces Hazel to resurrect Alcyoneus, the oldest and most prominent giant. Instead, Hazel destroys the island with her powers, killing her, her mother, and Alcyoneus, and delaying Gaea's plan for the better part of a century.Afterwards, because Hazel gives up her chance at Elysium to save her mother from the Fields of Punishment, she spends seventy years in the Fields of Asphodel until Nico di Angelo, her half-brother, comes looking to resurrect his sister Bianca. Upon learning that she'd been reincarnated, he resurrects Hazel instead, and she is brought to Camp Jupiter, where she is an integral part of the quest to rescue Thanatos. She begins a relationship with Frank.Despite being one of the (physically) youngest on the team, Hazel is very affectionate and motherly, and served as the primary source of comfort for Frank and Percy on their quest. She's very mature for her age, although this could be due to being around eighty years old. Whenever she thinks about her past life she has flashbacks (akin to very real dreams) towards them, and can even pull others in with her.Hazel is gifted with several powers. Beyond the aforementioned ability to summon gems, she is also able to use them in combat. She's also gifted with the power to control earth, as it's her father's domain. In the fourth book, she learns to manipulate the Mist.
Action Girl/Badass: Causing precious metal avalanches and holding off the Romans atop Arion with her cavalry sword is just another day for her, being one of the seven.
Back from the Dead: Spent 70+ years in the Fields of Asphodel after she sacrificed her place in Elysium to keep her mother out of the Fields of Punishment. Got out after Nico, after discovering that Bianca had already chosen to be reborn, rescues her instead.
The Big Easy: Lived almost her whole life in the French Quarter of New Orleans with her mom. Even in her new life, she originally finds it very hard not to spend half her time back there, one way or another.
Big Sister Instinct: While it's hard to say whether Hazel or Nico is officially the older sibling (Hazel was born first but died at 13 and hasn't aged a full year yet, while Nico is a "few" years younger chronologically but has actually celebrated 14 birthdays), it is not a question that Hazel doesn't appreciate anyone questioning the wisdom of saving Nico's life.
Blessed with Suck: Her dad's Pluto, so she has control of "all the riches under the Earth". It's a pretty sweet deal, unless a horrible curse wasn't directly tied to how valuable the metals were. So, if you aren't her, touching the metals she summons is bad for your health.
Cool Horse: Is the only person theCool Horse, Arion, will listen to (thanks in no small part to her gold-producing powers).
Daddy Had a Good Reason for Abandoning You: Pluto. His deliberately turning a blind eye to her means she won't have to go back to the Underworld, even though she's supposed to be dead. This also means he can never acknowledge her presence, making him one of the Gods to actually obey Zeus' orders to ignore demigods.
Uniquely, he is also one of the few godly parents who doesn't choose to abandon his kids. Hazel's mom refused him.
Deliberate Values Dissonance: When Hazel and Leo are dealing with Narcissus in The Mark of Athena, she's as enraptured as any of the nymphs. Until he makes a remark about how Narcissus loves "him". Hazel turns up her nose and doesn't think anything of him anymore. She's from the 1940s, so it's a nod to how certain attitudes from seventy years ago are still ingrained in her.
Foreign Cuss Word: "As Hazel marched up the hill, she cursed in Latin. Percy didn't understand all of it, but he got son of a gorgon, power-hungry snake, and a few choice suggestions about where Octavian could stick his knife."
Hate Plague: The other reason why it sucks to be a child of Hades/Pluto. Wherever she goes, she is deeply feared and hated by almost everyone around her (save for her close friends).
Heroic Sacrifice: Killed herself and her mother to stop Gaea from raising Alcyoneus and then gave up Elysium so her mother wouldn’t go to the Fields of Punishment.
Team Mom: Percy and Frank start depending on her for comfort in The Son of Neptune.
Two Girls to a Team: After Annabeth falls into Tartarus with Percy at the end of Mark of Athena, she and Piper are the only girls on the Argo II for most of The House of Hades. They end up bonding over this.
Weirdness Censor: Hecate tells Hazel she will have to learn to control the Mist to make it to the House of Hades.
Jedi Mind Trick: Hazel uses the Mist to manipulate people's perception. It's how she defeats Pasiphåe.
What Could Have Been: In-universe example. Had she stayed in New Orleans, Hazel would have grown up to marry her childhood friend, Sammy.
Nico di Angelo
Nico di Angelo
Son of Hades and Maria di Angelo, as well as a returning character from Percy Jackson and the Olympians. After the fall of Kronos, Nico spent more time in the Underworld looking to resurrect his late older sister Bianca, but resurrects Hazel instead after realizing Bianca had chosen to pass on. In the first book Annabeth mentions he's been helping out with the effort to find Percy, but he otherwise doesn't appear, spending most of his time either in the Underworld or Camp Jupiter as Pluto's ambassador.In the second book, Nico reveals his personal quest to search for the Doors of Death — however, he is captured by Gaea's forces and is held captive for the majority of the third book.Because of his reserved, anti-social, secretive personality, he puts up several walls, some of which he is forced to tear down over the course of the series. However, he has a notable soft spot for his sister Hazel.Being a son of Hades, Nico has several powers — he can control the earth, shadows, and can communicate with the dead. He fights with his unique Stygian iron sword.
Aloof Ally: Even when working with the crew in the fourth book, Nico doesn't talk much and prefers to stand off to the side.
Always Second Best: Narrowly misses being the hero of the last Great Prophecy, then Hazel shafts him out of being one of the Seven.
Ambadassador: Serves as Hades's main liason to the outside world.
Armored Closet Gay: Since he hasn't defined his sexuality completely; however it's worth noting that he kept claiming to have a crush on Annabeth and the god of love had to drag out an admission that Nico crushed on Percy before Nico and Jason could proceed with their quest. Justified, though, as a demigod son of Hades not even from this century, he felt like it would only ostracize him more.
Badass in Distress: At the end of the second book as a result of some Reckless Sidekick behavior investigating the Doors of Death himself, he gets captured by Gaea's forces. He's held captive in a jar throughout the third book until he's rescued.
Badass Gay: He has (or had) a crush on Percy and he is one of the most powerful demigods in the series.
Big Brother Instinct: It's hard to say whether he or Hazel is "officially" the older sibling, but Nico clearly loves her a lot, and seems to spend quite a bit of his time at Camp Jupiter talking to her and cheering her on.
Big Sister Worship: Less so than the previous series, but he's still pretty hung up over Bianca.
Black Sheep: Among the demigods, being a son of Hades and all — he just doesn't fit in.
Eerie Pale-Skinned Brunette: He was described as olive-skinned in the first series (as his mother was Italian), but his skin paled to white as he spent more time in the Underworld. This carries on into this series. After returning from his capture in Tartarus, his skin is described as "a sickly greenish-white, like the color of tree sap."
Foreshadowing: At the end of the Battle of the Labyrinth, during the massive battle, Percy notices some monsters break off from the large group and head towards the camp. He calls to Nico to stop them, and Nico summons some undead to take the monsters down. Among the undead: Roman Centurions. At Camp Half-Blood.
Gayngst: In The House of Hades, it turns out at least part of his broodiness and desire to stay away from others stems from his (unacknowledged and repressed) feelings for Percy Jackson.
Hates Being Touched: Hates touching others, too; the only person he seems to show any physical affection towards is Hazel.
Hopeless Suitor: In The House of Hades, it's revealed that he had a crush on Percy that started in The Titan's Curse, while Percy and Annabeth have mutual feelings for each other.
Looks Like Cesare: Increasingly since the previous series. Leo describes his eyes as sad and tired, and accounts this to him having stared into the depths of Tartarus.
Loner-Turned-Friend: In the previous series, he started out as a friend but became a loner due to Bianca's death. When this series starts he's still aloof and closed-off but willing to work with the heroes, and even becomes the team's Sixth Ranger of sorts in the fourth book.
Meditation Powerup: The Death Trance allows him to survive with limited air by eating one seed a day to survive. The seeds in question being from pomegranates grown in Persephone's garden.
Messy Hair: His hair is always overgrown and shaggy.
Mind Rape: It is heavily hinted that this is what Nico went through as a prisoner of Gaea, to give an idea of how broken Nico was when he was finally rescued, Percy delivers this thought:
Nico’s eyes looked like shattered glass. Percy wondered sadly if something inside him had broken permanently.
Necromantic: Non-villainous example. He really wanted to resurrect his older sister Bianca.
Nice To The Janitor: Unlike Percy, Nico visited Bob the Titan and spoke with him often, and apparently talked Percy up to him. It serves the dual purpose of saving Percy and Annabeth's lives in Tartarus and getting Percy to realize that he's neglected not just Bob, but Nico himself over the years.
Only Friend: Jason is this for him in The House of Hades (as Hazel is also his half-sister and his crush on Percy has complicated their friendship quite a bit.) Nico is Alice-1 and Jason acts as Bob-2. This is because he is Creepy Good and a Socially-Awkward Hero, and intentionally pushes people (including Jason) away.
The Promise: At the end of the third book, Percy makes him promise to lead the rest of the Argo II to Epirus to retake the Doors of Death before falling into Tartarus with Annabeth.
Rescue Romance: His crush on Percy started way back in The Titan's Curse when Percy saved him and Bianca from Dr. Thorn.
Sixth Ranger: Joins the crew of the Argo II and goes off with them to rescue Percy and Annabeth at the end of the third book.
Socially-Awkward Hero: Being a child of the most antisocial god doesn't bless one with good social skills.
Suddenly Sexuality: The House of Hades reveals that he had a crush on Percy that started in the previous series.
Superhero Speciation: Had some instances of Dishing Out Dirt in the previous series (notably, splitting the ground open to swallow up some skeletons attacking Percy and throwing up a wall of black rock in the Labyrinth to stop some pursuers), but now that this is his sister Hazel's main ability, he sticks to his "god of death" skill set.
We Do Not Know Each Other: To Percy, who barely buys it. When confronted, he states that it's not his place to help Percy remember who he is.
"I mean to save this camp, Percy Jackson. Things are worse than you realize."
A daughter of Bellona, Reyna and her sister Hylla were born in Puerto Rico and became employees of the sorceress Circe, seen in The Sea of Monsters. After the spa is destroyed and she parts ways with her sister, Reyna joins Camp Jupiter and eventually becomes co-praetor alongside Jason. As leader of Camp Jupiter Reyna is wise and calm, but has been struggling with leading the camp by herself while trying to keep Octavian from gaining power. She puts the camp's welfare over that of her own, and judges people with how they can assist the camp.Reyna displays no superpowers, but as a daughter of Bellona she is skilled with weaponry and combat. She fights with an Imperial gold spear and dagger.
Action Girl: As the daughter of a war goddess, she's very handy in a fight.
Aloof Dark-Haired Girl: Is described as tall and dark-haired, with a mature and regal aura which she puts to good use as the leader of Camp Jupiter. Deconstructed as she has a Dark and Troubled Past, so she puts up a mature facade and does not allow herself to show weakness in front her subordinates, as they look to her for guidance.
Chekhov's Gunman: While not named, she actually appeared as early as Sea of Monsters.
Despair Event Horizon: First she lost her home to and was imprisoned for months by pirates in Sea of Monsters, then was forced to go on the run with her sister, whom she eventually parted ways with. Which was bad enough. Then in Mark of Athena, after waiting for her love interest and best friend, Jason, to return to her and having to carry on the praetorship all by herself for eight months, Jason coming home with a girlfriend in tow and war breaking out between the Greeks and the Romans within the same hour has pretty much destroyed Reyna's hope that anything good will ever happen to her again.
Gondor Calls for Aid: Knowing that Camp Jupiter will soon be attacked, she tells Percy to find her sister Hylla and ask her to help.
Friendly Enemy: To Annabeth. They're similar in that they are determined, competent leaders who want the best for their camps, and they even seem to get along fairly well when interacting in The Mark of Athena before everything goes to hell.
Supporting Leader: Not in the main cast, but as the praetor she's supposed to lead the Romans.
Meaningful Name: Her name, like the similar-sounding Spanish "Reina," is a derivation of the Latin "Regina" (queen, counsel), and actually does mean "queen" in Filipino. Fittingly, she's the regal "queen figure" for Camp Jupiter.
Living Lie Detector: They serve as this, too, which makes them very useful when she's interrogating someone.
Her pegasus, Scipio, is one too. Which makes it all the more tragic when he is killed in the fourth book.
Only One Name: For the first three books, her surname isn't revealed at all. It's revealed she doesn't reveal it to just anyone.
Reasonable Authority Figure: Unlike Octavian, she's willing to listen to our heroes, and seems okay with negotiating for peace between the Greeks and Romans — until a possessed Leo fires on Camp Jupiter. Still, because of her tentative friendship with Annabeth, she doesn't skewer the protagonists on the spot, instead letting them proceed with their mission.
Romantic Runner-Up: Jason gets together with Piper instead of her, and although she doesn't openly bring it up, it's obvious she's not very happy about it.
Ruling Couple: She points out it might have happened with Jason if he stayed, then offers this to Percy.
The Stoic: As a leader of Rome, being serious and unemotional is practically hardwired into her.
The Woman Wearing the Queenly Mask: Has been carrying the leadership of Camp Jupiter on her own for the past eight months and is struggling under the weight of both protecting everybody from the monster attacks and fending off Octavian’s attempts at seizing the other praetorship.
A daughter of Zeus, lieutenant of the Hunters of Artemis, and a returning character from Percy Jackson and the Olympians. In the first book, she is off searching for Percy alongside the Hunters, but later comes across Jason, Piper, and Leo on their quest. Thalia reveals that she is Jason's older sister, and that his disappearance at the hands of his mother had been the last straw in her stormy relationship with her neglectful mother (alluded to in the previous series).Like Nico, Thalia keeps her powers from the previous series. Similar to her brother Jason, she can control the winds (but has a crippling fear of heights) and lightning.
Action Girl: Daughter of Zeus and lieutenant of Artemis, as well as being quite handy with a bow and arrow.
The Ageless: After becoming Artemis's lieutenant, she has effectively become this, remaining fifteen forever.
Aloof Big Sister: While they're both overwhelmed about their reunion, Jason's a little hurt that Thalia seems to have distanced herself from her life before the Hunters, considering them more her family than him now.
Big Sister Instinct: The only reason she didn't run away from her abusive mother sooner was because of Jason. Their mother offering Jason as a peace offering to Hera was the final straw.
Cool Big Sis: To Jason, although he is physically older than she is.
Octavian is a legacy of Apollo, meaning he is descended from one of Apollo's demigod children. This gives him the gift of prophecy and a position at Camp Jupiter as its augur, who kills animals and interprets their innards to see the future. Due to this being set in the modern world and the impracticalities of gutting animals every time the future needs to be read, Octavian guts stuffed animals instead.He is extremely ambitious and power-hungry, and aims to rise to the rank of praetor. He's willing to get his hands dirty in order to accomplish this, as seen when it's hinted he murdered Gwen. He also possesses a burning hatred of all Greeks, and calls for war against them. Reyna sees him as a danger to the camp, but as her nominal Number Two he finds ways to circumvent this.
Evil Chancellor: Seems to be acting as one to Reyna, as an active advocate of war against the Greeks. She quickly puts a stop to that. The moment she turns her back, he announces that they're changing their plans.
Evil Counterpart: To Rachel. He serves the same oracular purpose as she does, but he's creepy and manipulative while she's straightforward and nice. They meet in the fourth book; it doesn't go over very well.
Fortune Teller: An augur, specifically, and using his insight into the future to twist Camp Jupiter politics to his advantage.
Trojan Horse: Invokes it when he advises the Romans to "beware of Greeks bearing gifts. Subverted, since that wasn't the plan to begin with.
War Hawk: Is the most vocal in Camp Jupiter about going to war against the Greek demigods, and when Leo, possessed by an eidolon, starts firing on the camp, thereby giving him a reason, Octavian eagerly jumps on it and whips the Romans into a war frenzy.
Ambiguously Gay: He has a rainbow tattoo. While this is obviously intended to be a tribute to his mother the goddess of rainbows, it could also be something else given that practically everyone on Greek mythology was at least bi and the revelation of Nico's feelings for Percy.
A daughter of Aphrodite and also former head counselor of her cabin. She also appeared in The Serpent's Shadow.
Alpha Bitch: She fits the general trademarks: snotty, beautiful (she is one of Aphrodite's daughters, after all), and always gets her way. Until the end of The Lost Hero, where Piper kicks her out of the role as head counselor of the Aphrodite cabin.
Asian Airhead: She isn't the sharpest tool in the shed, to say the least.
Evil Counterpart/Shadow Archetype: To Piper. They're both daughters of Aphrodite and have the rare "charmspeak" ability, but Drew uses it to bend the other Aphrodite campers to her will, as opposed to Piper.
Seer: Being a son of Apollo granted him the ability to see the future. However, after he told a girl about her future death, Apollo cursed him by taking away his voice and locking him in his childhood home.
Tragic Keepsake: He kept the dagger from the girl he saved and passed it on to Luke (who would later pass it on to Annabeth).
Alabaster C. Torrington
Demigod son of Hecate, who fought for the Titans in the last war. He shows up only in Son of Magic, a short story at the end of The Demigod Diaries.
Hazel: Gods, no! That would be a disaster. He's addicted to red Kool-Aid. Drinks it with three times the normal sugar, and he's already ADHD — you know, attention deficit/hyperactive. One of these days, his head is going to explode.
Not So Different: Percy recognizes this when he relates his feelings of resentment to Luke's in the third book.
Posthumous Character: He died in the last book of the previous series, but he is still remembered and mentioned by other characters.
Other allies of the Seven.
"If I hear about any funny business, I will ground you until the Styx freezes over."
A protector and satyr.He is introduced as being one of the teachers at the Wilderness School attended by Jason, Piper, and Leo. During the fight with the venti he is captured, and is later rescued from Medea. He later becomes the Seven's official chaperon on the Argo II.Hedge is middle-aged, and often feels the need to prove that his age doesn't make him useless. As such, he is constantly raring to fight and puts a lot of emphasis on survival of the fittest, but he's also very quick-thinking and does truly care about the heroes underneath his gruff exterior.
Ascended Extra: He was mentioned by Grover in a one-liner in The Last Olympian, and is now a major supporting character.
Badass: Knocked out Keto, a primordial goddess, with a kick to the back of the head in Mark of Athena.
Blood Knight: He...loves violence. He wasn't bothered that Leo attacked New Rome since it meant fighting.
Hidden Depths: All the BadassBlood Knight tropes are his characterization from the first three books. In book four, we learn that he and Mellie got married not long before Argo II left, that Mellie's pregnant, that Hedge still feels guilt over not running to his mother's rescue because he was saving Clarisse at the time, and that he's terrified that something will happen to his wife and baby while he's stuck on the other side of the planet.
Large Ham: Hedge is very loud and flamboyant with his actions.
Leeroy Jenkins: He's...very eager to go into battle, even if who they're fighting is a potential ally.
I Let My Mother Die: Revealed in The House Of Hades that while he was bringing Clarisse in to Camp Half-Blood, his mother contacted him in a panic. He couldn't believe anyone would try to hurt an cloud nymph, so he brought the demigod in before looking for his mother. He never found her. Lends his fears for his wife and baby just that extra edge.
Papa Wolf: He is terrified that he won't be able to save his wife and baby, being stuck on the other side of the Atlantic. When it is suggested that he be one of the three to shadow-travel back to Camp Half-Blood in hopes of diffusing the war, he is elated.
Team Dad: He's gruff, stern, and attempts to keep the Seven in line in his own way. He's also prone to grounding them.
Would Hit a Girl: In Mark of Athena, he knocks out Keto, an ocean deity, with a kick to the head.
A dragon automaton and returning character from The Bronze Dragon, an ancillary story from the previous series. At the beginning of the series, he's gone haywire as a result of Beckendorf's death. Currently the figurehead and AI of the Argo II.
Living Ship: Seems sentient. Piper manages to temporarily charmspeak Festus's head into proper sentience in The House of Hades, after which the crew notes he seems more alive.
Only Mostly Dead: Sliced to pieces by lasers when he crash-lands on Midas's lawn, but this doesn't stop Leo from having Hephaestus take his head back to Camp Half-Blood so he cam become the Argo II's living figurehead.
Super Speed: Arion is stated to be the fastest horse on the planet. This is apparently not an exaggeration since at one point he does 800 mph.
The Titan of Mortality and Lord of the West, mind-wiped by the waters of the Lethe into becoming a janitor for Hades named Bob. Returning character from The Demigod Files, supplementary material of the original series.
Almighty Janitor: Literally — he's a Titan, but doesn't remember this and works as a janitor for Hades instead.
Anti-Villain: Implied to be this in some of Hyperion's dialogue. Granted, we don't actually get to see any of this during his debut, but then he seemed more happy to rise above his former self in The House of Hades.
"The gods have placed ancient magic on this island to keep me here. A hero can leave. I cannot."
Atlas's daughter, who lives in exile on the island of Ogygia. She looked after Percy in the original series when he washes up on shore, and has become somewhat embittered and angry after the gods bailed on their promise to release her from her isolation. Returning character from Percy Jackson and the Olympians.
And I Must Scream: Has been trapped on a island for millenia with no company. The only visitors she ever mentions? Hermes, Hephaestus, Odysseus, Sir Francis Drake, Percy Jackson and the unmentioned one she is telling this to: Leo Valdez. Odysseus was around 1000BCE, Drake the late 1500sCE, Percy and Leo in the early 2000s. Yeah.
Broken Bird: This side of her is explored more than in the previous series; as she's clearly quite bitter after centuries of being alone and under a curse, even after the gods promised to free her from it.
Curse: Indirectly inflicts one on Annabeth in The House of Hades due to her jealousy over Percy leaving her for Annabeth and bitterness over him not keeping his promise to get the gods to set her free.
Unrequited Tragic Maiden: Enforced. She's doomed to always fall in love with the hero who washes up on her island, but never have her affections returned, and the heroes cannot leave until she falls in love with them. It's finally subverted when she falls for Leo, who actually reciprocates her feelings.
The Giant counterpart to Ares. As Ares is warlike and bloodthirsty, Damasen is peace-loving and gentle. This put him at odds with the rest of his family, who exiled him in Tartarus. By the time our heroes encounter him, he has become bitter, but they find ways around that.
Arch-Enemy: Designed to be one to Ares. Didn't quite work out that way.
Demoted to Extra: He's one of the main characters in the previous series, but has a much smaller role in The Heroes of Olympus. The most he gets is some mentions, an appearance in a dream in Son of Neptune, and another appearance alongside Rachel in The House of Hades.
Ascended Extra: Many of the minor gods, who were just offhand mentions or nonexistent in the previous series, play large roles this time.
Broke Your Arm Punching Out the Titans: They're in no shape to defeat the giants because they're still recuperating from the last Titan war, with divine schizophrenia from their Greek and Roman sides as icing on the cake.
Demoted to Extra: Most of the major gods from the last series are laying low this time around, due to the chaos caused by their split personalities.
Jerkass Gods: As bad, if not worse, than before. A few, like Iris and Thanatos, are exceptions, however.
Inhumanly Beautiful Race: Unless otherwise stated (like in Akhlys's case), or if the narration says they cross into Uncanny Valley despite their beauty, you can expect a god's preferred form will be extremely easy on the eyes.
Split Personality: Between their Greek and Roman sides, although how bad it is tends to vary — some of the major gods are so incapacitated they have to lay low in order to not inconvenience the world. Other gods, such as Aphrodite and Nemesis, are hardly affected because of their "universal" domains.
"You must forge your own path for it to mean anything."
The goddess of marriage, women, and motherhood, as well as Queen of Olympus and Zeus's sister-wife. Returning character from Percy Jackson and the Olympians.Hera plays a bigger part in this series than she did in the last one — while still being somewhat petty and vengeful, she's more than willing to work together with demigods if it means toppling Gaea. It's revealed she's been running a gambit to stop Gaea since long before the first series, moving our heroes into place and plotting to unite the Greek and Roman camps even if it means defying her husband's will.She is kidnapped before The Lost Hero, and the objective of that book's quest is to free her. She appears again at the beginning of The Son of Neptune, where she brings Percy to the Roman camp.
Ascended Extra: She's a secondary character at best in the previous series, but is much more important in this one.
Character Development: Compared to how she was in the previous series, she's far nicer to demigods. She's shown Jason AND Percy respect and even been supportive, not even getting mad when Percy was basically chewing her out in his dreams. While Jason has some leeway as his Patron Saint, Percy has only the fact that he's one of the seven, and while she could try to boss him around, she's being pretty nice about everything. Though of course you would be nice to a demigod who requested the gods pay more attention to their children (bringing family closer) after saving Olympus. She extended Frank's life as well.
The Chessmaster: She's been putting her pieces into place for over seventeen years.
Damsel in Distress: In The Lost Hero, she's held prisoner in a cage at the Wolf House that utilizes her power to awaken Porphyrion and consequently Gaea, hence Jason, Piper, and Leo have to free her.
Gambit Roulette: She seems to be pulling this considering the whole Jason/Percy switch was her idea. Bonus points for working on this long before the first series, considering her actions with Frank and Leo.
Only Sane Goddess: Presented as this in The Lost Hero. She is stated to be the primary peacekeeper on Olympus and proposes the compromises that keep Olympus from falling apart thanks to her focus on family and duty. With her missing the egos and personality quirks of the other gods threaten to tear the world apart unless she is returned.
Run or Die: The new war has resulted in her being forced to flee from not only the giants, but the gods as well since she's trying to bring the Greek and Roman demigods together. This is because conflict between the two camps lead to severe conflict between the Greek and Roman identities of the gods, the most obvious side effect of which is excruciating pain.
Queen Incognito: Juno briefly pretends to be an old hippie lady dressed in trash bags when she dishes out her Sadistic Choice to Percy. She drops the act once they make it to Camp Jupiter.
Teeth-Clenched Teamwork: She knows several demigods (such as Annabeth and Thalia) don't like her, but they're going to have to work together to defeat Gaea and the giants.
Wicked Stepmother: To all children of Zeus/Jupiter, but startlingly inverted towards Jason. This could either be a bit of Character Development or or even Alternative Character Interpretation, or Hera just trying to save her hide: Why wouldn't Hera be nice to a demigod son of Zeus on the eve of the Gigantomachy? during the last one, Porphyrion nearly raped her until Hercules managed to kill him, which is what caused Hera to accept him in the first place. Maybe she just wants to be sure she'll be saved again.
"I’m the god of Rome, child. I am the god of military might used for a righteous cause. I protect the legions. I am happy to crush my enemies underfoot, but I don’t fight without reason. I don’t want war without end."
The God of War and a returning character from Percy Jackson and the Olympians. Mars is a mature, respected, militaristic god and draws an unflattering contrast between himself and his Greek form, who is a petty jerkass. He's also Frank Zhang's father, which Frank isn't very proud of.
Blood Knight: Subverted as Mars. He’s not about endless bloodshed without resolution.
Doting Parent: Compared to how Ares treated Clarisse, his Roman counterpart nearly rivals Poseidon.
Hidden Depths: One might expect that a war god is nothing but a brutal Blood Knight, but Mars is actually very smart and kind of nice.
Obfuscating Stupidity: Pretends to not remember who Percy is in front of the Romans even though Frank can tell he’s lying.
Pet the Dog: Keeps Grandmother Zhang company while she’s waiting for Frank to come home one last time.
So Proud of You: Mars grants Frank his blessing in the fourth book, something he only does to children he's extremely proud of (like Clarisse in the previous series). Well-deserved, as Frank had just killed 200+ monsters with poison breath and poison gazes single-handedly.
Vitriolic Best Buds: Acts like this with Percy, who's probably a lot more appealing to Mars than he was to Ares.
"Yes, my children will avenge me."
Goddess of wisdom, craftsmanship, and tactical warfare. Annabeth's mother, as well as a returning character from Percy Jackson and the Olympians.If you thought the personality contrast between Mars and Ares was bad, wait till you see Athena and Minerva. While the former was portrayed in the series as dignified, wise, and cautious, Minerva is furious at the Romans for devaluing her as a war goddess note the Romans despised defensive maneuvers and only fell back on them as a last resort and for stealing her statue, the Athena Parthenos. When she appears, she is Revenge Before Reason incarnate, saying that the Romans must die for the disgrace.
Abusive Parents: Not normally, but in Mark of Athena, she shows an incredibly nasty side towards her daughter.
Justified in that she was suffering from divine schizophrenia as a result of the Greek-Roman war, like most of the other gods. On top of the stress breaking down her usual logic, Athena has just had all her hatred of Rome stirred up again.
Chickification: In-Universe. As a Greek goddess, she had a major role and was a strong warrior. However, the Romans made her a minor goddess who only made crafts, which enraged her. It didn't help that they also stole her statue and hid it for centuries.
Disproportionate Retribution: The Romans turned her from a major goddess to a minor one and offended her as a warrior. In addition, the Romans stole the grand statue of Athena from her temple in Greece and have hidden it for centuries. She wants all Romans killed in response and has her children keeping the grudge between the two sides going strong.
Also, in regards to Arachne. Annabeth states that Arachne is a better weaver when compared to Athena, but her true crime was insisting she was better since it was a sign of hubris against the gods. Even then Annabeth thought turning Arachne into a spider was going too far. Going by other comments, Athena is prone to this when someone claims or "is" better than her at something whether it is true or not or is one of her own children.
Entitled Bitch: Her conversation with Annabeth was just straight up emotional abuse.
It's All About Me: Her Roman mode, at the very least, seems to be of the opinion that retrieving her statue is of the utmost importance, to hell with any toes she might step on the way. As it turns out, it could be crucial to keeping the peace between the camps.
Reasonable Authority Figure: She had nothing against Percy while voting him to be killed to stave off the Big Three prophecy and actually consented to Percy/Annabeth (though she does threaten Percy if he mistreats Annabeth.) This does not apply to Romans.
Sore Loser: Is seen as this by Arachne, although whether or not she actually was one at the time is...confusing.
"Beauty is about finding the right fit, the most natural fit. To be perfect, you have to feel perfect about yourself -— avoid trying to be something you're not. For a goddess, that's especially hard. We can change so easily."
Goddess of love and beauty, who plays a bigger role this time around. Mother to Piper, as well as a returning character from Percy Jackson and the Olympians.Aphrodite is seemingly unaffected by the Split Personality ravaging her fellow Olympians. She attests this to love being the same being Greek and Roman or anything else, and while she keeps the giggly, teasing, temperamental demeanor from the previous series, she hints at a steely competence and a deep empathy for those around her.
Shipper on Deck: Even more than in the last series — she doesn't care to hide it for anything. Add Jason/Piper to her list of ships.
Aphrodite: Paris and Helen were a cute couple...
Split Personality: Averted. Love is the same no matter Greek or Roman, so she's not as affected. It also doesn't hurt that she's the oldest Olympian, closer to creation than even the Titans!
Dionysus / Bacchus
"Did someone just call me the wine dude? Its Bacchus, please. Or Mr. Bacchus. Or Lord Bacchus. Or, sometimes, Oh-My-Gods-Please-Don’t-Kill-Me, Lord Bacchus."
Head of Camp Half-Blood, but currently incapacitated due to the split personality issues mentioned above. That said, Bacchus is far more jerkish and unreasonable than Dionysus, which isn't really saying much. His Roman form slew two giants as a demigod. Returning character from Percy Jackson and the Olympians.
The Alcoholic: Although as mentioned in the previous series, he's forcibly off the bottle. Bacchus drinks Diet Pepsi instead (versus Dionysus, who drinks Diet Coke).
Jerkass: The biggest one of all the Roman gods so far. All of the faults of Dionysus magnified to the point he refused to "help" without a huge tribute. Once he has it, he forces to Jason and Percy to fight the giants AGAIN for his entertainment and only after they have once again killed them does he bother to banish them.
Miles Gloriosus: Boasts about fighting in the first giant war barely remembering that Hercules did most of the work and he himself defeated the weakest giants. Later, talks as if his killing Otis and Ephialtes was a major victory for him.
The various winds.
King of the winds, weatherman of Olympus.
Ascended Extra: Was mentioned in The Last Olympian as the one defending the skies of Olympus.
Blow You Away: He's the most powerful wind god, and as such has domain over winds.
Cloudcuckoolander: Being the weatherman of Olympus 24 hours a day will do that to you.
Spanner in the Works: Thanks to her and her brothers' interference, the Argo II is blown into North Africa and Leo is stranded in Ogygia. Eventually this is all rectified, but the crew loses a lot of time.
Brick Joke: During Boreas' rant about Notus in the first book, he makes an offhand mention of his holiday retreat in Cancún. When Notus makes his appearance in The House of Hades, he too says that he has a lovely place in Cancún during the off-season.
If I Can't Have You: Was in love with Hyacinthus and was jealous of the god Apollo's closeness to him, so when Apollo and Hyacinthus were playing a game Zephyros arranged for the disc to strike Hyacinthus. He doesn't seem too hung up about it, though.
Mysterious Stranger: With a bit of The Watcher, he says that he's been watching Nico for years, knowing that one day he'd have to return to Split and face Cupid.
The goddess of rainbows and a messenger goddess. She used to run the Iris Messaging service, but has turned over most of it to her assistant Fleecy to focus on running her store and developing an identity of her own.
Death by Irony: A fan of inflicting it. Ask Narcissus...as soon as he stops looking into his mirror.
Equivalent Exchange: In the original series, she took one of her children's eyes to influence Camp Half-Blood's victory. In Mark of Athena, she offers the same for Leo, a heavy price for her help should he need it.
Leo uses her offer to save Hazel and Frank's lives... which comes at the cost of trapping Percy and Annabeth in Tartarus.
Split Personality: Averted. Revenge is universal, and her name remains the same whether Greek or Roman, rendering her immune to the debilitating effects of the war.
Child of Zeus who ascended to Godhood as a minor god who guards the doors of Olympus. Previous owner of Percy's Cool Sword.
Berserk Button: The very mention of Hera will piss him off. He was nice and friendly to his half-brother Jason, hating to give hard quests since he was once a demigod...right up until he mentioned Hera's name. Then he gave them a really hard one and threatened to kill everyone on the Argo II.
Canine Companion: Apparently, she turned Hecuba, the former Queen of Troy, into a Labrador.
Heel-Face Revolving Door: Born a Titan and served the Olympians in the first war, but is remembered for her stint on the Titan's side in the previous series (although this was pretty justified given how the gods treated her). She's now back on the gods' side, although to what extent is ambiguous.
Jedi Mind Trick: Notable for being the best Mist manipulator the series has seen so far, due to it being part of her powers.
Neutral Female: In Son of Magic (a short story in the Demigod Diaries), she stays out of Alabaster's fight against Lamia, and only intervenes when he's about to trap Lamia in her own sand. Justified; she's a god and both Alabaster and Lamia are her children, so she can't play favorites.
Two Roads Before You/At the Crossroads: Hecate is the goddess of crossroads, and as such can predict possible outcomes each choice will lead into. In The House of Hades, she shows Hazel three possible outcomes their crew could end up with given their precarious situation, and none of them are pretty.
Uh-Oh Eyes: Hazel describes them as black and creepy; although Hecate asserts that she isn't evil, magic, her domain, is merely a tool.
Required Secondary Powers: Apparently she doesn't have this. When she creates rivers of poison and Percy takes control, they affect her just as much as they did him.
Son of Aphrodite and god of love.
Adaptational Badass: This version of Cupid isn't the cherubic winged baby that is normally portrayed. This guy gives Nico and Jason a run for their money and manages to drag out a Nico's suppressed feelings about Percy.
Combat Pragmatist: Fights Jason and Nico while invisible. As he himself has said, love isn't fair and doesn't fight fair either.
Love Hurts: As the personification of love, he seems to take a dry delight in this trope.
Jason: Is this guy Love or Death?
Cupid: Ask your friends. Frank, Hazel, and Percy met my counterpart, Thanatos. We are not so different. Except Death is sometimes kinder.
Man in White: He wears a white suit which only contributes to his harsh beauty.
Pretty Boy: Jason notes that Eros is beautiful and harsh, like it's difficult to look directly at him.
Small Role, Big Impact: He only shows up in one chapter, but what he does in that chapter (forcing Nico to confess he had a crush on Percy in order to defeat him) affects Nico's personality and his interactions with Jason throughout the rest of the book.
Attention Whore: How Percy and Annabeth manage to talk her down: they pretend to be tourists and that when they booked the "Tartarus excursion" Nyx was hardly mentioned. She doesn't take this very well.
Casting a Shadow: Part of her power set as the goddess of night is the ability to move in and out of shadows.
The End of the World as We Know It: The entire plot is about preventing Gaea from waking up, since this trope is what's going to happen if she does. And she can't be defeated, because her body is the planet Earth itself.
Manipulative Bastard: Definitely more keen on this tactic then Kronos was. Following the theme of family ties, she emotionally manipulates near everyone using loved ones (Piper, Percy, Leo, Hazel, even some gods). Frank is supposedly an exception, thanks to his convoluted legacy.
Non-Action Big Bad: Because she's asleep, she pulls strings to get what she wants rather than directly doing things herself.
The Dreaded: For very good reason. It takes a You Shall Not Pass by Bob and Damasen to slow him down long enough for Percy and Annabeth to escape. What, exactly, do you think happened to them afterwards?
Unskilled, but Strong: Thankfully, for all his power, he's clearly unused to combat in a corporeal form, a weakness the heroes are able to exploit. Justified, though, as he'd never summoned a physical manifestation of himself before this point, and was essentially taking his baby steps.
Arch-Enemy: Each one was designed to destroy a specific god.
Eviler than Thou: The gods and Titans are not saints and it is sometimes hard to see a difference between them. However, everyone agrees the giants are worse than both. Being children of the Greek version of Hell it is to be expected.
Implacable Man: Their primary strength. They lack the vast magic possessed by the gods, but are designed to keep coming no matter what thanks to only being able to be killed by a god and demigod working together.
Our Giants Are Bigger: The average giant or giant-sized monsters are around 10-12 feet tall. These giants are around 20 feet or more.
The most powerful of the giants and their king. Deigned to be a direct counter to Zeus including power.
Too Dumb to Live: As pointed out by Frank — when you're unkillable as long as you stay in the boundaries of the state of Alaska, you really shouldn't hang out in the part of the state that's only 10 miles wide.
Informed Ability: Supposed to be the anti-Poseidon, and his mere presence left Percy in a shivering pile the first time he saw the giant. Percy proceeded to open up a can of whoopass on him when they encountered one another during the last battle, and Polybotes became the first giant to lose against a demigod in single combat (okay technically a god was there). Some anti-Poseidon.
Small Role, Big Impact: Resurrects Daedalus's Labyrinth in her twenty-odd page appearance, inadverently providing the heroes with a way to get the Arthena Parthenos back to Camp Half-Blood.
Son of Poseidon and bandit extraordinaire.
Fearsome Foot/Smelly Feet: Tells Hazel and Jason that they have to clean his feet to let him go. Neither of them are happy about it, because his feet are absolutely disgusting, but also because as soon as you bend down, he kicks you right off the cliff.
A peppy old woman who booked Claymore's event in Keeseville, New York. She's mostly an annoyance to Claymore. Only shows up in The Demigod Diaries. She turns out to be a monster in disguise and the half-sister of Alabaster through Hecate. She's been tracking Alabaster with the intent of murdering him on Gaea's orders, forcing him to move from town to town and constantly keep up magic barriers to hold her off. Thanks to being brought back from Tartarus by Gaea, she can't die, making it difficult for Alabaster to get rid of her for good.
Bitch in Sheep's Clothing: Hinted at later on, when after acting like an enthusiastic and sweet, if rather irritating, grandmotherly old lady to Claymore, she calls him to demand he hand over the card about Alabaster's address to her for no discerned reason. Comes to fruition when she shows her true nature as a monster who works for Gaea.
Even Evil Has Loved Ones: She wants to bring back her children, which Gaea promised to do for her. For her, if killing Alabaster means having them back, then so be it.
Freudian Excuse: In the past, when she was a Libyan queen, she was courted by Zeus and had two children she loved. When Hera found out about her relationship with Zeus, she murdered Lamia's children, and in front of her, no less. Needless to say, Lamia didn't take it well.
Genki Girl: An elderly version, but she's quite enthusiastic and full of praise for Claymore after he's finished with the event. Subverted, however, when she's revealed to be a monster.
Mama Bear: A twisted variant. She loves her children dearly and will bring them back to life at any cost, even if it means working for Gaea and murdering people.
Demoted to Extra: Has a far less important role in The Heroes of Olympus than in the previous series, besides getting some mentions, an appearance in the first book, and an appearance in a dream (alongside Grover) in the fourth.
Out of Focus: Doesn't appear in the second and third books, although she returns in the fourth.
'80s Hair: Her description in the previous series includes that she had a "poofy hairdo".
Abusive Parents: Attracting the king of the gods (twice) had a negative effect on her ego, and eventually she turned to alcohol. This led to many arguments with Thalia. She's not above offering her son as a peace offering for an angry goddess, either.
The Alcoholic: She turned to drink later in life, which caused her rift with her daughter.
Be Careful What You Wish For: She was very poor and couldn't escape poverty. When the spell she cast summoned Pluto, they dated, and after Hazel was born, Pluto promised her anything she wanted. She asked for all the riches under the earth, and Hazel got the power to summon and control jewels and precious metals... but everything she summons is cursed, unless she or Pluto touches it. Everything Marie sold brought horrible fates to those who bought them, and she ended up just as poor.
My God, What Have I Done?: Just before Alcyoneus is about to rise, she realizes what her selfishness caused and is willing to give up her life to save Hazel. However, Hazel doesn't let this happen and instead dies with her to delay Alcyoneus's rise.
Lady of War: Described as being very calm and graceful, but an excellent fighter.
Love Will Lead You Back: An inversion — after never seeing Mars for years, it's implied that she went to war in Afghanistan because she thought she'd meet him there. Whether this was true or not, we don't know, sadly.
Mama Bear: Figuratively and literally. She turned into a bear to protect her son from one.
A mortal living in Keeseville, New York. A scholar who gives lectures when he's not writing and finds his life and everything he knew turned on its head after meeting Alabaster Torrington. Shows up only in a short story, Son of Magic, at the end of The Demigod Diaries.
Awesomeness by Analysis: He can understand Latin, which gives him an edge when Lamia uses Latin spell incantations, as he can make pretty good guesses what's about to happen. His observations of how quickly Lamia can pull herself together after being wounded also works to his advantage, or seems to. See Unwitting Pawn.