If you guys see a character that hasn't been taken and you'd like to be that character, just say so below!

1.) Perseus "Percy" Achilles Jackson

Percy is the son of Poseidon, born of gentle tides and, like the sea, does not like to be restrained. Because of his father, Percy has ADHD, dyslexia, and many powers. He has hydrokinesis: he can create (hydrogenesis, though it takes a lot of his energy and he rarely does it), summon, and control water in any of its forms. Percy is immune to water pressure, can breathe underwater (and create oxygen bubbles that allow his friends who cannot breathe underwater to do so), cure most poisons, and can heal most wounds with water. Percy can control the water around him to propel himself through the water and can shoot water, even blast water of his own creating. Percy can harden water into an almost solid shape and can use this ability to walk on water and to create giant hands that did as his real hands did. He can also telekinetically operate any ship he is on and has an awareness of said ship; he also has perfect bearings on the ocean so he can easily navigate his way on water. Speaking of mind abilities such as telekinesis, Percy can talk normally and telepathically to equestrian and aquatic creatures, who generally treat him with lordly respect. On top of this, Percy can speak to other children of Poseidon (and, of course, other gods of the sea such as Poseidon himself) underwater. Percy can create hurricanes and other storms and because of this atmokinesis he has limited electrokinesis and aerokinesis. Other "kinesises" Percy has is geokinesis (he can generate earthquakes and volcanic eruptions because of this earthquakes), cryokinsis (he can manipulate frozen/icy water around him and is able to use snow and ice to make an icy hurricane), and limited toxikinesis (he can control and manipulate poisons). As the telekhines said in St. Helen's, the sea flows within Percy and thus he has a supernatural heat resistance, though he is not fireproof and can still be burnt. Another flaw of his is his Fatal Flaw, which is excessive personal loyalty; he would do anything, even give up the world, for those that he loves. And he loves Annabeth Chase! Percy is a brave, spirited leader and is willing to risk his life to save friends, family, strangers, and sometimes even enemies. He had a sarcastic and smart sense of humour, a laid-back demeanour, and has earned the respect of all the Olympians, even Artemis (who strictly dislikes men), Dionysus (who hates most heroes), and Hades (who hates pretty much everyone), and the respect and trust of the Roman demigods (who are distrustful rivals of the Greeks). Percy remains true and never purposefully goes back on his word, though he feels responsible for everyone and anything that goes wrong, such as the deaths of his friends, mainly in the Second Titan War. This may be because of his Fatal Flaw. Also, Percy is kind of short-tempered and thus has trouble controlling his anger, such as when he sees bullying. He tends to blurt out things before thinking. [A/N: Okay, I got lazy. If you wanna find out more about Percy's personality or Percy in general, just go to Riordan wikia. I got all of his powers and stuff from there, and I pretty much copied the whole Personality part.]
Played By: OpenTheBookAndRead

2.) Annabeth Chase

Annabeth has ADHD, dyslexia, fighting skills, and knows Morse Code. She is a master strategist, very capable in hand-to-hand combat, skilled with a sword, a knife, and a bow. Unlike most demigods who use mid-range weapons, Annabeth fights better with knives or daggers despite their, compared to the more-often-used sword, small size. Annabeth is also skilled with crafts, such as weaving, and her hands can move with blazing speed even if she stops thinking about it and just does it. She loves architecture and spends her free time designing new buildings. Her Fatal Flaw is hubris; she thinks she can do anything and do it well. Annabeth can be very caring but possessive of the people she loves. And to the people she doesn't love (or at least not yet) and in fact just met, she is harsh and judgemental. After winning her approval, she is loyal and will stick by their side. Annabeth is very strong-minded and equally stubborn, but also incredibly crave and daring. She is dauntless, courageous, and determined. She is clever, witty, analytical, strategic, and wise. But after Percy disappeared, she has developed a fear of losing him and has become reckless in a situation that concerns him.
Played By: AnnabethChase553355

3.) Jason Grace

[A/N: After "Thalia Grace", the whole part about his personality was copied from Riordan Wikia because I became too lazy to put it in my own words.] The son of Jupiter and younger brother of Thalia Grace, Jason is a very serious young man with a moderate sense of humour. He also has a strong sense of honour and justice as shown by his great compassion. He greatly cares for his friends and family, willing to risk his life to protect or help them. Though a natural leader, Jason can be plagued by doubt and criticizes himself whenever he makes an error. There are notable similarities between Jon and Percy such as: their strong senses of justice and fairness, their loyalty to their friends, and the fact that they're both natural leaders. When on board the Argo II, Jason comments that he has never been surrounded by equals before, as most of the one people look up to him because he is a child of Jupiter. Jason is also very accepting of others since, unlike many others, he felt no contempt or prejudice towards Nico, even after finding out he was homosexual. Jason even offered Nico his friendship and support, and encourages him to take a risk and come out (of the closet). Jason is also very confidential in his abilities. After he and Percy were possessed by the eidolons and fought each other, Jason commented that he was worried that he could have killed Percy, instead of Percy possibly killing him. He also chooses to face Lityerses in combat instead of being turned to girl by Midas. Jason was even ready to face the Giant King Porphyrion, even though he knew he would not win. [A/N: The situations listed before could be changed if the roleplayer of Jason decides to.] He has ADHD, dyslexia, training in Roman legionary warfare, and fighting skills. Jason has aerokinesis (he can control and generate very powerful air currents and ride them to make him fly, he can see air magic and is able to dominate the will of venti, and he can generate ropes of wind), atmokinesis (he can generate fierce storms and control weather), electrokinesis (he is immune to electricity, can summon lightning bolts and has limited electrical conductivity, and can generate huge bolts of static electricity and send static shocks). To top it all off, Jason has mastered the wolf-stare. Jason is quite powerful but he does have some flaws, such as his Fatal Flaw, which is not outright side but it may be power like his sister Thalia. Perhaps it is hubris because he grew up with many people looking up to him and believing he could not fail.
Played By: Frostleaf1615

4.) Piper McLean

Piper is the cabin counsellor of Aphrodite's cabin. [A/N: Unless you guys end up changing that....] She has ADHD, dyslexia, a great singing voice that she can weave charmspeak into, and knowledge of Greek mythology because she helped her father research on the subject for a role he had. Speaking of her father, he is the famous actor Tristan McLean, though she keeps that a secret from her classmates in fear of being treated differently because of her father's status in the celebrity world. This is one piece of evidence that proves Piper is different from her maternal half-siblings. She is more aggressive than them, wanting to learn how to fight and protect herself; she's also more down-to-earth and is not always focused on her looks. In fact, when she receives the blessing of Aphrodite [A/N: Which doesn't have to happen; she can be claimed by other means.] she is embarrassed and even tries to wash the makeup or take the clothes off. And before she was claimed by Aphrodite, she said she would be perfectly fine with her godly parent being anyone so long as it wasn't Aphrodite and even calls the Aphrodite cabin a "life-sized dollhouse". [A/N: Doesn't need to happen—the latter or former—if you don't want to, Cori.] But because of Aphrodite, Piper has some cool powers, such as amokinesis, charmspeak, beauty, and fluency in French. She has control over many degrees of love, lust, and beauty, though on a smaller scale than her mother of course. Piper can influence others with enhanced vocal persuasiveness and is able to radiate beauty, which sometimes presents enemies to willingly attack her, even if she's going to chop their heads off. She can attract the opposite gender as she walks by, and her eyes are like kaleidoscope as they change constantly change colour. And, since French is the "language of love", Piper can speak it fluently. Her Fatal Flaw is not clear but she shows signs of it being jealousy because she was easily jealous of other girls if they even had a slice of chance with Jason.
Played By: annabethchase1550

5.) Leo Valdez

Described as a "Latino elf", sixteen-year-old Leo Valdez is the son of Hephaestus though he shares many traits with the children of Hermes: elvish ears, a mischievous smirk, and a love for practical jokes. However, underneath the playfulness Leo hides a surprising amount of pain and guilt. When he was eight, Gaea visited him and tricked him into setting his house ablaze. Leo, to his shame, had started the fire that killed his mother. He then jumped from foster home to foster home since his family members blamed him for his mother's death and did not want him; what they didn't know was that he blamed himself as well and their rejection only added to the reserve of insecurity he already had. Leo's Fatal Flaw is not outright said, but he shows many signs of his Fatal Flaw being the feeling of inferiority. Other Leo has ADHD, aka supernatural battle reflexes, though he is even more ADHD than he average demigod. He is also dyslexic, for his brain is hardwired for Ancient Greek; he was also taught Spanish and Morse Code by his mother as he grew up. As the son of Hephaestus, Leo has technokinesis: he can instinctively drive or fly any mechanical vehicle expertly, he can sense faults in metal ore and identify machinery type and use machines by touch, he can sense and understand machinery and has the ability to operate machines he had had no experience with before. Leo can also communicate with machines like Festus and detect traps. Leo is also the first demigod child of Hephaestus in hundreds of years to master the ability to generate and control fire: he can increase the heat of his fire even to the point that it becomes white-hot and can create walls of flame. He can also increase the heat to such an extent that he is pretty much a living supernova. Leo can sense heat, flames, and metals, which allow him to walk in thermal vision. On top of all this, Leo is also fireproof. Along with his demigod abilities, Leo has a few magical items: his magic tool-belt, from which he can pull simple tools, food, medical supplies, and breath mints from. From time to time, he pulls out a three-pound club hammer from this tool-belt and uses it as his weapon; it's his primary weapon, in fact. [A/N: I would also say he has Festus, Buford, and the Archimedes Sphere, but if you guys want to not do that, then it wouldn't really make sense, would it?]
Played By: PJOHOOROLEPLAYER

6.) Hazel Levesque

Hazel is bright and outgoing with a love for creativity and horseback riding, but has a dislike for boating and cursed. Percy states that she was a great comfort to him and Frank; he, Percy, felt a little uncomfortable when depending on her for comfort, but was glad she was there. Percy also describes her as being very mature for her age (physically she was thirteen but technically eighty-three), and at times called her confident. She ignored others at times for her own preferences. For example, she carried a cavalry sword whole not owning a horse to ride into battle on, and she originally didn't want to like Frank because everyone said they would end up together. Hazel most probably has ADHD and dyslexia, but she can't be sure because in her time they didn't know about ADHD/ADD or dyslexia yet. She also has a wolf-stare, limited Louisiana French, and skills in swordsmanship. Hazel has geokinesis (she can find underground caves, tunnels, and trapdoors and change their shapes or destroy them), ferrokinesis (she can sense precious metals or materials and can summon and control town of precious metal and jewels simultaneously), limited telumkinesis (she has some control over weapons because she is ferrokinetic but not as much as a child of Ares/Mars, such as Frank, has), Mist manipulation (she has a great potential to perform magic and manipulate the Mist and IF she decides to seek out this potential she might have the ability to Mist travel and to use Mist placement: visit Riordan Wikia for more info), and death sense (she can sense when someone or something died and can sense undead creatures). Hazel also has the power of shadow-travel and is able to look back at events from her life before she died, "flashbacks". Hazel's Fatal Flaw is not clear, but it might be grudges like her half-siblings Bianca and Nico. She shows signs of this being her Fatal Flaw because she has trouble forgiving herself for releasing Alcyoneus; a grudge against herself. But it might not be so because she easily forgave her mother when they faced the judges of the Underworld.
Played By: awesomecreepers5

7.) Frank Zhang

This son of Mars is very different from his paternal half-siblings. He is somewhat shy, cynical, and pessimistic due to personal clumsiness and low self-esteem. He had a strong sense of duty and loyalty, especially to Hazel. Frank has an extreme fear of fire, since it could burn his stick and end his life. In addition, Frank is courageous and a natural battlefield commander. According to Percy, Frank is the only decent son of the god of war that he has ever met because, unlike most of his siblings, Frank is not overwhelmingly arrogant and violent. He is also different by the fact that he is not dyslexic or ADHD, but simply lactose-intolerant. Frank was taught some Latin at camp, though, and he also knows some Canadian French for he was taught it at school and some Chinese for he was taught it at his old home. Frank's weapon of choice is the bow and arrows; he is accurate and masterful in shooting because of his father Mars. Frank even managed to design different kinds of arrows for different functions, such as his hydra arrows which could string together enemies, resulting in them being tied up and/or pinned against walls. But Frank is also a swordsman because of his father and a tactician. Frank can control dead ghosts and skeletons of Ancient Rome Legionnaires, for the spirits of the dead on the side that lost a war owed their souls to Mars/Ares. Frank also has the limited ability to change into any animal he wishes, mythical or real. However, this ability is easier in times of danger and battle or if he knows the animal well. Frank's Fatal Flaw is not revealed in the series, but it may be insecurity because he has low self-esteem.
Played By: kats_life_

8.) Nico di Angelo

[INFORMATION GIVEN LATER]
Played By: open

9.) Reyna Ramírez-Arellano [A/N: My personal favourite character in all of the Heroes of Olympus series!]

[INFORMATION GIVEN LATER]
Played By: annabeth4136

10.) (Coach) Gleeson Hedge

Sent to receive the "package" of Leo and Piper in The Lost Hero, Gleeson Hedge, who goes by Hedge or Coach Hedge because of his role at Wilderness Academy as a coach, is an energetic and tough satyr who addresses everyone as "cupcakes". [MORE INFORMATION GIVEN LATER]
Played By: brittbookworm15

All the original antagonists will be played by me, so Gaea, the Giants, Tartarus (if needed, because we might not end up going to Tartarus at all), Octavian, et cetera. Any other side characters, such as Chiron, Bacchus, Rachel, Mellie, et cetera will be played by my friend Rosie, aka Xx-The-Author-xX .

The roleplay has BEGUN but a NICO is STILL NEEDED.