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Titan Lord of the South
Titan of Stars and Constellations
Titan of Measurement of the Year
Vital Statistics
Gender Male
Family Ouranos (father)
Gaea (mother)
Eurybia (wife)
Pallas, Perses, and Astraeus (sons)
Status Immortal
Eye Color Unknown
Hair Color Unknown
Height Any Height
Affiliation Titans
Weapons Sword, Ram Horns
Species Titan
Home Mount Othrys
Greek/Roman form Crius
Appearances The Battle of the Labyrinth (mentioned)
The Last Olympian
The Lost Hero (mentioned)
The Son of Neptune (mentioned)
The House of Hades
Actor None
Quests None
I always get the stupid jobs. Lord of the South. Lord of Constellations. Now I get to babysit Atlas while you have all the fun.

–Krios to Hyperion, shortly before the Battle of Mount Othrys

Krios (meaning "ruler", also known as Crius and Kreios) is a son of Ouranos and Gaea.  He is the grandfather of Hecate, the goddess of magic. He is also the Titan of Stars and Constellations; he is associated with the constellation Aries. This was the first of the constellations, whose springtime rising marked the start of the new year in the ancient Greek calendar. He is known as the Lord of the South and as "The Ram", which explains the ram horns on his helmet in The Last Olympian. Krios sides with Kronos in the Second Olympian War. While Kronos was being defeated, Jason Grace and his allies from Camp Jupiter defeated Krios and destroyed him and Mount Othryrs.


The least individualized among the Titans, he was overthrown in the Titanomachy.

Consorting with Eurybia, daughter of Gaea, the Earth, and Pontus, the Sea, he fathered Astraeus and Pallas as well as Perses. The joining of Astraeus with Eos, the Dawn, brought forth Eosphoros, the other Stars and the Winds.

Named the Lord of the South after being part of the conspiracy against Ouranus, he was the one on the southern part of the world making sure that the sky wouldn't collapse. Krios was inexorably involved in the First Olympian War, however, without any specific part to play. When the war was lost, Krios was banished along with the others to Tartarus, the darkest part of the underworld.

In Greek mythology, Krios was one of the Titans in the list given in Hesiod's Theogony, a son of Ouranos (sky) and Gaea (earth). M.L. West has suggested how Hesiod filled out the complement of Titans from the core group, adding three figures from the archaic tradition of Delphi, Koios, Phoebe, whose name Apollo assumed with the oracle, and Themis. Among possible further interpolations among the Titans was Krios, whose interest for Hesiod was as the father of Perses and grandfather of Hecate, for whom Hesiod was an "enthusiastic evangelist."

Percy Jackson and the Olympians

The Battle of the Labyrinth

He was mentioned by Luke Castellan, who questioned Kronos if the Titan Krios can lead the Titan Army through the Labyrinth. This implies that he was released from Tartarus at about this time. 

The Last Olympian

Krios is first shown at Mount Othrys watching the scenes of wars next to Hyperion. He talks to his brother Hyperion about the war and then starts to pout due to Hyperion being able to burst into fire and he having to have ram horns and being Lord of the South. After the defeat of Kronos in Manhattan, Hermes mentions him running away and Mount Orthrys being destroyed, though it was actually destroyed by the Romans. Hermes's reason for not revealing the truth was due to the separation of the two camps. 

The Heroes of Olympus

The Lost Hero

Jason Grace, son of Jupiter, who defeated Krios

It is revealed that Krios was defeated by Jason Grace in the Roman attack at Mount Othrys. He lead the forces of Camp Jupiter against the Titan Army and fought Krios himself in hand to hand combat. Jason mentioned his battle with Krios when explaining how Camp Jupiter was unknowingly helping the demigods of Camp Half-Blood defeat the forces of the Titans.

The Son of Neptune

It is revealed that Jason single-handedly bested Krios in a combination of swordsmanship and hand-to-hand combat during the war.

The House of Hades

Krios, alongside Hyperion, appears guarding the Doors of Death in Tartarus when Percy Jackson, Annabeth Chase, and his brother Iapetus/Bob the Titan arrive there. Shortly before, he and Hyperion had transported the Giants, including Enceladus, PolybotesAlcyoneusOtis and Ephialtes out of Tartarus through the Doors, along with countless monsters. Krios holds the "Up" button to transport the monsters inside the Doors of Death (which is modeled after the elevator entrance into Olympus) up into the mortal world and prevent them from being lost in the space between the Doors' two sides. He briefly argues with Hyperion over who should get to go up into the mortal world first, and exhibits an overwhelming desire to get revenge on Jason for killing him at the Battle of Mount Othrys. Whenever Iapetus argues with Hyperion and states that their mother Gaea favors her second set of children the Giants over her first the Titans, Krios agrees with him and states that the Titans are stuck guarding the Doors while the Giants get to wreak havoc in the mortal world. Shortly after, Tartarus himself arrives to kill Percy and Annabeth in person, and he quickly gets rid of Hyperion and Krios, who are sucked into the vacuum that is Tartarus's face.


Not much is known about Krios, though he is certainly as cruel and arrogant as his other Titan brethren. He constantly feels overlooked by the other Titans, as they are put on the front lines of the invasion of New York City and he is left to look after Mount Othrys. He also feels that his abilities are somewhat overshadowed by those of other Titans, like Hyperion who can burst into flames. And yet, it was still considered impressive that Jason defeated him, though this could just be because he is an immortal Titan. In The House of Hades, he is very grumpy about having to stay in Tartarus and guard the Doors of Death, while more and more Giants were released into the mortal world. He vows revenge on Jason Grace for overpowering him, and intended to return through the Doors of Death to avenge his former defeat.   


The ram, a common symbol of Krios.

Krios is about twenty feet tall, wearing black (possibly Stygian iron) armor with stars on it, while his helmet it shaped like a ram's head with horns on it. His weapon of choice, as seen in The House of Hades, is a massive sword, which he draws on Hyperion during an argument. 


The full extent of Krios's abilities is unknown: 

  • Prowess in Battle: As an Elder Titan, Krios is very powerful, though not as much as his brothers Hyperion and Kronos. Krios was, apparently an excellent swordsman and hand-to-hand combatant, as he was able to hold his own against Jason Grace, one of the most powerful demigods in the world, though Krios was eventually defeated.  
  • Stars and Constellations: As the Titan of Stars and constellations, Krios might have some relevant abilities, such as creating new constellations.   
  • Titanic Energy: Like all Titans, Krios can blast things hundreds of yards away from himself with a yell or a wave of the hand.
  • Titanic Divine Form: as Kronos's elder brother, it is possible that Krios also had the ability to incinerate any being less than a god/Titan only by being present. 


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
Minor Characters: Rachel Elizabeth Dare | Thalia Grace | Nico di Angelo | Gleeson Hedge | Reyna | Octavian | Fleecy | Dakota | Ella | Tyson | Mrs. O'Leary | Arion | Hylla | Echo | Bob | Calypso
Olympian Gods: Zeus | Hera | Poseidon | Hades | Ares | Demeter | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus
Minor Gods: Achelous | Aeolus | Boreas | Calais | Keto | Khione | Zethes | Thanatos | Iris | Hypnos | Hecate | Nemesis | Notus | Triptolemus | Mithras | Serapis
Roman Gods: Jupiter | Juno | Neptune | Pluto | Mars | Minerva | Ceres | Lupa | Bellona | Fortuna | Janus | Terminus | Vulcan | Mercury | Pomona | Hercules | Cupid | Auster | Aquilon | Favonius | Letus
Giants: Enceladus | Porphyrion | Polybotes | Alcyoneus | Ephialtes | Otis | Clytius
Undead: Echo | Gray | Lityerses | Medea | Midas | Narcissus | Otrera | Phineas | Sciron
Primordial Gods: Gaea | Tartarus | Phorcys | Ourae | Nyx | Chaos | Ouranos | Akhlys | Erebos | Hemera | Geras | 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
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