Jason:You should fear me as they [Satyrs] do! I am Jason, slayer of the minotaur. ... I will slay you as I did the Earth Bull. I will tear down your temple and I will scatter your followers to the four winds!
The Chosen One: According to the Oracle. Just what he is chosen for she is rather vague on though.
Dance Battler: Relies heavily on his incredible agility and flexibility during fights.
Disappeared Dad: Jason's father disappeared into the same vortex that he did, and it's implied he came to some bad end in the world of Atlantis. Jason still doesn't know the whole story.
Genre Savvy/ Genre Blind: Manages to fluctuate between the two, mostly down to the fact he has a basic memory of Greek mythology but does not always remember the exact details.
Screw Destiny: Doesn't take too kindly to finding out he will one day kill Medusa. He walks out of the Oracle's temple cursing her and Atlantis, determined to avert his foreseen fate.
Trapped in Another World: Twice apparently. The Oracle claims that he was born in Atlantis and taken to our world as a child.
Wrestler in All of Us: Although preferring to rely on Agility and speed, he's got some serious skills, considering he competed in (and would have won) the Pankration, after a few days training, when it normally takes months.
Actor: Robert Emms
Pythagoras’ wide-eyed innocence and awkward naïveté belies his brilliant mind.
Accidental Murder:Accidentally killed his father by pushing him back resulting in him cracking his head when he attacked his mother in a drunken rage. His younger brother Arcas finds out in "The Furies", having previously believed him to be murdered.
Friendless Background: In the pilot, he's sentenced to death by Minotaur. The two people he spends his last night with are Hercules (who he met on a loan deal) and Jason (who he met yesterday). They all quickly become true friends though.
Mister Exposition: Generally the one to explain the curse of the week, and how to fix it.
Omnidisciplinary Scientist: Mathematics, biology, medicine, curses...if you can name it, odds are Pythagoras knows something about it. Justified in that science is not far advanced enough to have disciplines.
Combat Pragmatist: Is a capable fighter, but is in no way afraid to cheat or fight dirty. It's treated as a character flaw by pretty much everyone, even Pasiphae, since he's trying for the throne and thus needs to be seen as honourable.
Expy: He's got a lot of similarities to Arthur, but like other characters it's subverted. He's introduced being a jerkass and fighting the hero, is under the thumb of the Big Bad who is his relative, is royalty, but he never redeems himself or shows Hidden Depths, and is killed by the hero at the end of the season.
Momma's Boy: He's under the thumb of his aunt, Pasiphae, with whom he appears to have a substitute mother-son relationship.
Wrestler in All of Us: His preferred fighting style, as he's very good at Greek style wrestling, justified in that he's been training for and competing in the Pankration since he was a boy.
Actor: Jemima Rooper
A woman for whom Hercules develops feelings after Jason frees her from the Maenads' cult.
Foregone Conclusion: At the end of her first appearance, she's cursed by the dying High Priestess of Dionysus. She is eventually transformed into a gorgon by Pandora's Box in the ninth episode.
Let Them Die Happy: Medusa is rescued from the Maenads along with another girl whose dying, elderly father had tasked Jason and friends to save her; but the girl kills herself rather than reveal the cult's secrets, with her last words being that her father is dead to her. Medusa comforts the old man by lying to him that his daughter is happy and eloped with a man she loved.
Gorgeous Gorgon: As of 'Pandora's Box'. Her transformation gives her snake hair, but doesn't change anything else about her outward appearance.
Medusa: Naturally, however this show actually has her as a character before she was cursed to become a monster. Which occurred when she opened Pandora's Box, in "Pandora's Box".
A High Priest in the Temple of Poseidon, Melas is a trusted ally of the Oracle.
Good Shepherd: Probably best shown in "Touched by the Gods" where he visits Ariadne who is awaiting her execution and offers to pray with her.
Mouth of Sauron: Heroic variation. The Oracle cannot leave the Temple (or at least we have never seen her do so), so any time someone needs help outside the temple or the Oracle needs to fetch someone, he's sent out.
Actor: Alexander Siddig
As King of Atlantis, Minos oversees a prosperous city and a mighty army.
Expy: Subverted With his line in the trailer "You dare to defy your king?" many assumed he was just an expy of Uther, however his character arc has been quite different and is more a sympathetic character with a tragic fate at the hands of his wife ahead of him.
Genre Savvy: In "Touched by the Gods: Part Two" he is quick to see Jason has deep feelings for his daughter. While understanding, he gently tells him it won't happen because she is royalty and he a commoner.
Papa Wolf: As far as we know, he's not even aware that Pasiphae was poisoning him, but the news that she tried to execute his daughter is more than enough for him to turn against her.
Principles Zealot: While he's not the nicest guy in the world, he does appear to at least honour the laws he enforces. If a condemned prisoner survives their virtual death sentence, he releases them immediately, accepting they have the favour of Poseidon.
Invoked by Ariadne by noting how Jason would have bested Heptarian in Pankration if Jason chose to but showed him mercy is a sign from the gods their engagement should be absolved. After a moment to think on it, Minos agrees.
Reasonable Authority Figure: Minos might be elitist and strict, but he is also reasonably fair, takes his responsibilities seriously and tries to keep his kingdom safe.
Screw the Rules, I Make Them!: He absolves Ariadne of treason without even knowing the circumstances, purely because she is his daughter and no one can defy him.
The Usurper: Although who he usurped is still a mystery.
Actor: Juliet Stevenson
A celebrated and revered figure, the Oracle knows only too well the impact her prophecies can have on men.
Heroic Sacrifice: He helps Jason and the guys rescue Ariadne in the finale, staying behind to cover their escape. He manages to kill several guards and still stand after being wounded, but is ultimately killed by Heptarian.