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[1]. She suggests that the spy is one of Luke Castellan's siblings (implying the Stolls).
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 preparations, she scolded the Stoll brothers for wanting to raid a candy shop[2]. 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."[2] Later on when the fighting got closer to the Empire State Building, she was heard yelling to hold their lines[3]. 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[4].
The Heroes of Olympus[]
The Blood of Olympus[]
Katie is mentioned along with Miranda, trying to help the Nature Spirits resist Gaea's influence[5].
Personality[]
Katie is very kind and patient, yet passionate and willing to risk her life for the gods. She dislikes the Stoll brothers because they put chocolate Easter bunnies on her cabin's grass roof.

Demeter, her mother.
Abilities[]
- 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 nice for inspections.
Trivia[]
- 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 or she stepped down at some point.
- Her last name is likely a reference to her mother, Demeter, Goddess of Agriculture.
- Katie Gardner is named after one of Rick Riordan's former student.
- In The Lightning Thief: The Percy Jackson Musical, Katie Gardner was mentioned just before Prologue/The Day I Got Expelled started.
- In The Lightning Thief: The Percy Jackson Musical, Katie Gardner also makes an appearance in the song Another Terrible Day.
- In The Lightning Thief: The Percy Jackson Musical Katie Gardner makes an appearance in the song Campfire Song