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Lou Ellen Blackstone[1] is a Greek demigod daughter of Hecate, and the Head Counselor of her cabin.

The Heroes of Olympus

The Lost Hero

Before a camp counselor meeting begins, she plays a prank on Miranda Gardiner, head counselor for Demeter's Cabin, by literally removing her nose from her face. She eventually gives it back when Chiron asks her to, because he wants to start the meeting.

The Blood of Olympus

Lou Ellen, along with Nico di Angelo, Will Solace, and Cecil Markowitz, set the Romans' onagers off-course before they can fire on Camp Half-Blood. Lou Ellen used her Mist-controlling magic to hide the four demigods from the Romans so they could complete the task without getting spotted, but eventually, the magic wears off and they are seen. She argues against Octavian's accusations against the Greeks; saying "And the men who were about to burn our camp to ashes?" suggesting a large amount of loyalty to the Campers and a protective nature. In the process, she uses a Pig Ball, a magical item property of Hecate cabin, and turns six of the Roman guards into piglets. This is remarked on by Nico in high praise, causing her to blush. After Gaea's defeat and the end of the war, Lou Ellen turned the Romans that had been turned into piglets back to normal on Chiron's insistence, albeit somewhat reluctantly.

Hecate, her mother.

The Trials of Apollo

Camp Half-Blood Confidential

Lou Ellen was mentioned to have done Cabin inspection along with Travis and Connor Stoll. During Cabin inspection, she made other people's personal items disappear by manipulating the Mist which later reappeared.


Lou Ellen's appearance is never described in detail though she, along with the other children of Hecate, may have inherited her mother's dark hair and green eyes.


  • ADHD: Like most demigods, Lou Ellen possesses inborn supernatural battle reflexes and senses that she uses to analyze the fighting style of her opponent.
  • Dyslexia: Her brain is 'hardwired' for Ancient Greek.

  • Mystiokinesis: As a daughter of Hecate, she can cast and manipulate magic.
    • Telekinesis: Lou Ellen can levitate objects as shown in The Lost Hero when she levitated Miranda Gardiner's nose.
    • Protection: Lou Ellen and the other children of Hecate used magic barriers to protect Camp Half-Blood from the impending Roman invasion.
  • Mist Control: As a daughter of Hecate, she can control the Mist. This ability means she can alter mortals' memories and perceptions, also she can use it to summon a 'Mistform'.
    • She can create illusions.
    • She can create false memories.
    • She can make monsters invisible or have them be seen as something else.
    • She can hide locations.
    • She can summon Mistforms.
    • She can disguise and hide people.
    • She can disguise and hide objects.
    • She can influence the minds of mortals.
    • She can teleport through the Mist.

  • Magical Items

    • Pig Ball: When defending the camp from the legion, Lou Ellen uses a pig ball to turn legionnaires into piglets. When she changes the piglets back, she does so grudgingly.


    • The second part of her name, 'Ellen', means 'Torch'. This could be a reference to her mother Hecate, as her attributes are twin torches.
    • The first part of her name, Lou, is a Greek name, however, Ellen is not.
    • Due to the translator's mistake, in the Polish version of The Lost Hero, Lou Ellen was introduced as a boy.
    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 | Lamia | Iapetus/Bob
    Minor Characters: Rachel Elizabeth Dare | Grover Underwood | Thalia Grace | Fleecy | Mrs. O'Leary | Kinzie | Arion | Calypso | Lou Ellen Blackstone | Chiron | Will Solace | Tristan McLean | Don | Julia | Jacob | Michael Varus | Burly Black | Medea | Midas | Lityerses | Phineas | Otrera | Echo | Narcissus | Sciron | Pasiphaë
    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 | Apollo (Roman) | Diana | Venus | Bacchus | Pomona | Aquilon | Hercules | Cupid | Auster | Favonius | Letus | Victoria
    Giants: Enceladus | Porphyrion | Alcyoneus | Polybotes | Ephialtes | Otis | Damasen | Clytius | Mimas | Orion | Hippolytos| Thoon | Periboia
    Undead: Gray
    Primordial Gods: Gaea | Tartarus | Ourae | Nyx | Chaos | Ouranos | Akhlys | Hemera | Elpis | Spes
    Monsters and Magical Creatures: Cynocephali | Gorgon | Gryphon | Harpy | Basilisk | Lycanthrope | Gegeines | Cyclops | Katobleps | Unicorn | Giant Eagle | Ichthyocentaur | Satyr/Faun | Storm Spirit | Laistrygonian Giant | Lares
    Related Content: Rick Riordan | Haley Riordan | Percy Jackson and the Olympians | Percy Jackson and the Olympians: 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