Characters who appear in The Heroes of Olympus. For characters from the previous series (and elaboration on tropes from the previous series returning in recurring characters), check out the previous series' character sheet. Note that spoilers from the previous series and several other spoilers may be unmarked.
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The seven Demigods of the Second Great Prophecy.
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.
Amnesiac Lover: At the beginning of 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
Berserk Button: Betrayal. Even the insinuation that he (or his friends) could be traitors is enough to hit this.
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.
"They had to walk through some rough neighborhoods, but nobody bothered them. Whenever the local gang members came close enough to look in Percy's eyes, they quickly veered away. He'd perfected his wolf stare over the last few months - a look that said: However bad you think you are, I'm worse"
Fight Magnet: As are all Demigods, though being the son of Poseidon 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.
Homeless Hero: Searching for the Roman camp at the start of Son of Neptune.
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. They still make it out in the end.
Lightning Bruiser: Strong enough to hold the world on his shoulders. Fast and agile enough to shatter a Roman military formation comprised of other demigods. And all that's without water, which only magnifies these traits.
Oblivious to Love: As of House of Hades, he's completely unaware of Nico's feelings for him. It takes him a while to catch on to the meaning of Reyna's words to him in The Son of Neptune, and in the original series he was completely unaware of both Annabeth's and Rachel's feelings for him.
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's so powerful that every thing that gives him trouble comes from outside circumstances; the only person who can take him in a straight fight 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.
Heroine of the last series, she's out of the picture in the first two books, but comes back into the picture in book three on an ancient quest from Athena.
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.
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.
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 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 House of Hades, and briefly thinks that if he died, it would be her fault.
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.
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.
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 rigid where Percy is rebellious thanks to their different camps. They even look very different, with green-eyed, dark-haired Percy and blond-haired, blue-eyed Jason.
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.
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.
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.
Daughter of Aphrodite, one of the resident heroines and Jason's girlfriend.
Action Girl: Her only power is charmspeaking, but its powerful enough to daze enemies, knock people alseep, 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.
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 House of Hades, where she uses it to defeat Zethes, Calais and Khione. Said defeat included using Charmspeak to power up the deactivated Festus.
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.
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 House of Hades. They end up bonding over this.
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.
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.
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, 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.
Heartbroken Badass: Becomes this around three quarters of the way through 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.
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.
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.
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 to also to not 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."
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 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 (Leo’s great-grandfather).
Always Second Best: Narrowly misses being the hero of the last Great Prophecy, then Hazel shafts him out of being one of the Seven.
Here's hoping third time's the charm. Nico is the likeliest candidate to be his father's demigod partner during the actual battle with the Giants, as Hades cannot interact with Hazel without having to enforce his own rules of death.
Ambadassador: Serves as Hades's main liason to the outside world.
Armored Closet Queer: 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 Queer: It's not made clear whether he's gay or bi, but 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.
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 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.
Only Friend: Jason is this for him in 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 due to his aforementioned crush on Percy.
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.
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.
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.
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.
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.
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.
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. 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.
A rainbow tattoo intended to be a tribute to his mother. The GODDESS OF RAINBOWS.
Can be both. Contrary to modern sanitized versions (including this one, obviously), practically everyone on Greek mythology was at least bi. And now with Nico, the "sanitized" part is out of the way....
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.
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.
I Let My Mother Die: Revealed in 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.
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. Currently the figurehead and AI of the Argo II.
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. Returning character from The Demigod Files, supplementary material of the original series.
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.
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: A variation. She's doomed to always fall in love with the hero who washes up on her island, but never have her affections returned. It's finally subverted when she falls for Leo, who actually reciprocates her feelings.
As a note, the aforementioned heroes cannot leave until she falls for them.
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 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.
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.
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.
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.
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.
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.
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
Head of Camp Half-Blood, but currently incapacitated due to the split personality issues mentioned above. His Roman form slew two giants as a demigod. Returning character from Percy Jackson and the Olympians.
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 Epbialtes 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.
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.
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 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.
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.
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.
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.
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.
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: A 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. 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.