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Katie Gardner is a Greek demigod daughter of Demeter, and the former Head Counselor of her cabin at Camp Half-Blood during the Percy Jackson and the Olympians series.

Percy Jackson and the Olympians

The Last Olympian

Katie is the counselor of the Demeter's Cabin. During the War Council Meeting, it is shown that she has had a bitter rivalry with the Stoll brothers (Travis and Connor), ever since they covered the whole grass roof of the Demeter cabin with chocolate Easter bunnies. She suggests that the spy is one of Luke Castellan's siblings (thinking it is most likely the Stolls). She is similar to her mother, Demeter, when she lectures. Once, she yelled at the Stoll brothers for wanting to steal things, which is ironic since they are Hermes' sons.

Katie rode on the strawberry trucks along with the rest of the campers from Camp Half-Blood to the Empire State Building, and prepared to defend the city. During the battle she was ordered by Percy Jackson to take her cabin and defend the Brooklyn Battery Tunnel. It was said that they "turned it into a jungle." Later on when the fighting got closer to the Empire State Building, she was heard yelling to hold their lines. After the Battle of Manhattan, Katie reported to Percy when he came down from Olympus that she saw Rachel Elizabeth Dare leaving the Empire State Building unharmed, before taking Blackjack back to Camp Half-Blood.

The Heroes of Olympus

The Blood of Olympus

Katie is mentioned along with Miranda, trying to calm the Nature Spirits.


Katie is very kind and patient, yet passionate and willing to risk her life for the gods. Katie is said to remind Percy of her mother Demeter, by her bossiness and the way she argues. She dislikes the Stoll brothers (Connor and Travis) because they put chocolate Easter bunnies on her cabin's grass roof. As her mother is Demeter, the goddess of Agriculture, she would have liked gardening and nature.

She is shown to be stern with others, a trait she inherited from her mother.

Demeter, her mother.


  • Chlorokinesis: As a daughter of Demeter, she has absolute control over plants. The children of Demeter helped in the Battle of Manhattan and use it to make their cabin look good.
  • Culinary Arts: As a daughter of Demeter, she's a natural cook.


Percy Jackson

Katie gets along well with Percy Jackson.

Annabeth Chase

The daughter of Demeter gets along well with the daughter of Athena.

Grover Underwood

She has a good relationship with Grover.

Connor and Travis Stoll

She may be rather stern with everybody though, because her mother was mentioned to be rather stern. It is revealed in The Last Olympian that the Stoll brothers have somewhat of a rivalry with Katie, ever since they decorated the grass roof of her cabin with chocolate Easter bunnies as a prank. Despite this, Katie is close to the brothers.

Miranda Gardiner

As Miranda is Katie's sister, it is assumed that they have some sort of connection.


  • Miranda Gardiner is the head of Demeter's Cabin in The Lost Hero with no explanation as to what has happened to Katie. It is speculation that she is only a summer camper, because The Lost Hero happens during the winter time.
  • Her last name is a clear reference to her mother, Demeter, Goddess of Agriculture.
  • Katie's name was actually the name of Rick Riordan's former student named Katie Gardner.
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) | Sea of Monsters (film) | The Demigod Files | Demigods and Monsters | The Ultimate Guide | The Heroes of Olympus