Don't be too discouraged when you read it, dear. He does have your interests at heart.

–Martha, talking to Percy in The Sea of Monsters

Martha is a snake that was caught by the god Hermes. She is immortal, though she is not a monster. Demigods and gods can hear her speaking to them in their minds. Martha is always seen with her male counterpart George. In The Sea of Monsters film she is voiced by the actress Octavia Spencer.


Martha is constantly scolding George for whatever he says. They live on Hermes' Caduceus. When the caduceus morphs into a phone, she is on the antenna, and also becomes a pen when their costumers receive their packages to sign their receipt. Martha is kinder, firmer, more understanding and more serious than George. She often soothes Percy Jackson when he's confused.

Percy Jackson and the Olympians

The Sea of Monsters

She makes her first appearance when Hermes visits Percy near the lake in Camp Half-Blood and he has Martha and George with him. She gives the Thermos of winds as a gift for Percy, as well as continually having to scold George for saying things that are out of the conversation or for teasing Percy. She appears the second time with Hermes to deliver a letter from Percy's father, Poseidon. She advised Percy to not be discouraged when he reads it.

The Last Olympian

Hermes arrives in Olympus to deliver a message, Martha and George with him. Percy says something that anger Hermes and when he tries to punish him, Martha and George come to the rescue and whisper to Hermes that Percy has the curse of Achilles.

They were with Hermes also at the end of the Second Titan War, when Luke Castellan had died. Martha was whispering, "Luke, poor, Luke." They were silent when Hermes talked to Percy.

Heroes of Olympus

The Demigod Diaries

Percy Jackson and the Staff of Hermes

George and Martha are stolen by Cacus when Hermes accidentally leaves them in the Hermes Express truck. Cacus tried to make the snakes obey him, but Martha calls out to Percy when he comes to save them with Annabeth Chase. While Cacus again attempted to make the snakes follow his command, George and Martha would try their best to mess him up, such as when they changed into a phone when he tried to turn Annabeth into stone. Despite their best efforts, Cacus eventually got Martha and George to change into Laser Mode, and he chased the two demigods around New York. When Percy got the caduceus back, George and Martha gladly changed into Laser Mode to defeat Cacus.


Martha is much more serious than her counterpart George. While George normally asks for rats or guinea pigs, Martha is constantly getting trying to get him back on topic and correcting him when he makes a mistake.


Percy Jackson and the Olympians
Core Series: The Lightning Thief | The Sea of Monsters | The Titan's Curse | The Battle of the Labyrinth | The Last Olympian
Main Characters: Percy Jackson | Grover Underwood | Annabeth Chase | Tyson | Clarisse La Rue | Thalia Grace | Nico di Angelo | Chiron | Luke Castellan | Rachel Elizabeth Dare
Minor Characters: Travis Stoll | Connor Stoll | Mrs. O'Leary | Silena Beauregard | Charles Beckendorf | Sally Jackson | Paul Blofis | Blackjack | Zoë Nightshade | Bianca di Angelo | Juniper | Michael Yew | Ethan Nakamura
Olympian Gods: Zeus | Hera | Poseidon | Demeter | Ares | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus | Hades | Hestia
Minor Gods: Amphitrite | Ariadne | Hecate | Iris | Janus | Morpheus | Nemesis | Pan | Persephone | Triton
Titans: Kronos | Atlas | Calypso | Iapetus | Krios | Hyperion | Oceanus | Prometheus
Related Content: Rick Riordan | The Lightning Thief (film) | The Sea of Monster (film) | The Demigod Files | Demigods and Monsters | The Ultimate Guide | The Heroes of Olympus
The Heroes of Olympus
Core Series: The Lost Hero | The Son of Neptune | The Mark of Athena | The House of Hades | The Blood of Olympus
Main Characters: Jason Grace | Piper McLean | Leo Valdez | Percy Jackson | Frank Zhang | Hazel Levesque | Annabeth Chase | Reyna Ramírez-Arellano | Nico di Angelo | Gleeson Hedge
Secondary Characters: Hylla Ramírez-Arellano | Dakota | Tyson | Ella | Octavian | Halcyon Green | Dr. Howard Claymore | Alabaster C. Torrington | Iapetus/Bob
Minor Characters: Rachel Elizabeth Dare | Grover Underwood | Thalia Grace | Fleecy | Mrs. O'Leary | Arion | Calypso | Lou Ellen Blackstone | Chiron | Will Solace | Tristan McLean | Don
Olympian Gods: Zeus | Hera | Poseidon | Hades | Ares | Demeter | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus
Minor Gods: Achelous | Aeolus | Asclepius | Boreas | Eurus | Hecate | Iris | Hypnos | Keto | Khione | Kymopoleia | Mithras | Nemesis | Nike | Notus | Phorcys | Serapis | Thanatos | Triptolemus | Zephyros
Roman Gods: Jupiter | Juno | Neptune | Pluto | Mars | Minerva | Ceres | Lupa | Bellona | Fortuna | Janus | Terminus | Vulcan | Mercury | Pomona | Aquilon | Hercules | Cupid | Auster | Favonius | Letus | Victoria | Orcus
Giants: Enceladus | Porphyrion | Alcyoneus | Polybotes | Ephialtes | Otis | Damasen | Clytius | Mimas | Orion | Hippolytus | Thoon | Periboia
Undead: Medea | Midas | Lityerses | Gray | Phineas | Otrera | Echo | Narcissus | Sciron | Pasiphaë
Primordial Gods: Gaea | Tartarus | Ourae | Nyx | Chaos | Ouranos | Akhlys | Erebos | Hemera | Elpis | Spes
Related Content: Rick Riordan | Percy Jackson and the Olympians | Demigods and Monsters | The Ultimate Guide | The Demigod Files | The Demigod Diaries | The Son of Sobek | The Singer of Apollo | The Staff of Serapis | Percy Jackson's Greek Gods | Percy Jackson's Greek Heroes | The Crown of Ptolemy | Demigods & Magicians | Demigods of Olympus | Percy Jackson Demigod Collection

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