I will know what you fear most.

–Phobos, to Percy Jackson

Phobos (meaning "fear" in Ancient Greek) is the Greek god of fear and the son of Ares and Aphrodite. He was known for accompanying Ares into battle along with his brother, Deimos. He and his twin brother Deimos were responsible for stealing Ares' War Chariot from Clarisse in The Demigod Files. His Roman counterpart is Timor.

Percy Jackson and the Olympians

The Demigod Files

The Stolen Chariot

Angry that their sister, Clarisse La Rue, was allowed to ride in Ares' chariot (because usually only sons of Ares are allowed to), Phobos and Deimos decide to steal it from her. They then hide it in the Staten Island Zoo, and use it as bait to catch their sister and Percy. Phobos fights Percy, but is defeated and disappears.

The Heroes of Olympus

The Blood of Olympus

Underground, when Piper McLean and Annabeth Chase are fighting Mimas, Piper sacrifices her cornucopia to her brothers, Phobos and Deimos. Deimos's face came off the wall and crashed onto Mimas, killing him, indicating that the god had caused this action to get rid of the giant. Then Piper thanked her brothers and asked for a way out. Phobos then opened up a hole in the wall for them to get out along his twin.


Phobos is described as a teenage boy with fiery eyes, dressed in ratty jeans, a black shirt, and a leather jacket. He wears a bandana on his head and has a knife tucked in his belt.


  • Phobos presumably has standard powers of a god.
  • Persona Worst Fear Generation: Phobos has the ability to make individuals see their worst fears, shown through eye contact. In The Demigod Files, Clarisse saw her father Ares in a fury, while Percy saw Camp Half-Blood and all of his friends in flames. However, Phobos can only do this to one person at a time.
    • Fear Domination: Phobos is unable to be fought without gaining some sort of awareness; first the fish in the aquarium awaken Percy and Percy wakes Clarisse, even after this it seems to still take some amount of will power to fight back.
  • Odikinesis: Being a son of Ares, Phobos can possibly control the feelings and emotions of war.
  • Teleportation: He can vanish in a curtain of yellow vapor.
  • Statue Manipulation: In The Blood of Olympus, Phobos was apparently able to bring a statue of himself down upon Mimas without seeming to be physically present.
  • Poor Swordsmanship: Without his power, Phobos is a terrible sword fighter (likely never having to rely on it so he never trained).

Ares, his father


Phobos may be able to change his appearance into his Roman form, Timor. As Timor he becomes more disciplined, warlike, and militaristic. It is unknown if he is known at Camp Jupiter, and it is unknown if he has any children, Phobos or Timor.



  • He is often paired with his brother, Deimos, and together they cause fear and terror (Deimos meaning terror).
  • Phobos likes to taunt people and show them their fears.
  • Despite of being a son of the god of war, Phobos is a terrible physical combatant. 
  • When questioned about the difference between the two it was stated Phobos typically acts on one person at a time and Deimos acts on a larger scale.
  • Their names and duties are sometimes used interchangeably.
  • Phobos, the larger and closer of the two moons of Mars, is named after this deity.
  • The word phobia derives from his name (which he really is proud of, according to Clarisse).
  • Percy admits that out of all of the gods and monsters that he disliked, Phobos "took the prize."
  • Despite their behavior towards Clarisse, Phobos and his twin are not all that bad, as they accepted Piper's request for help.
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
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