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Well, it's the only pig ball I have. So don't ask for encore.

–Lou Ellen to Nico di Angelo, in the Blood of Olympus

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

Right before the meeting between the camp counselors begin, she is seen playing got-your-nose with Miranda Gardiner. Lou had actually disconnected her nose, and she was trying to get it back. Eventually Lou gives Miranda it back when Chiron orders her to.

The Blood of Olympus

Lou Ellen, along with Will Solace and Cecil Markowitz were sent to spy on the Romans. Lou had wrapped all three of them in the Mist to keep themselves hidden. The three come across Nico di Angelo along the way, and they team up to break in the Romans' camp. Once Nico's distraction was set off, they sneakily entered the camp, and were initially unseen because of Lou's magic.

Cecil managed to sabotage one of the onagers, but the team was caught by a guard when they attempted to recalibrate another one. Will ran off to draw some of the guards away, and Lou turned the other Romans into piglets with her pig balls. Lou, Will, Cecil, and Nico, tried to head for a third onager, but were spotted once more.

Lou warned the others that the Mist wouldn't work on enemies expecting a fight. Nico managed to fend off the guards by summoning an army of skeletons. Lou and Cecil joined the fight, leaving the guards tangled in an odd assortment of ropes and bones. However, the demigods were soon confronted by Octavian, who immediately ordered his guards to fire the onagers.

Lou Ellen was present with the other the demigods in the final battle. She is explicitly mentioned at the end, when Chiron ordered her to turn back the piglets she transformed. Lou obeyed, somewhat reluctant.

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 may have inherited her mother's dark hair and green eyes along with the rest of her siblings.

In The Blood of Olympus, it is mentioned that she wore a black T-shirt and jeans, with black grease paint on her face like a commando. Binoculars hung from her neck and she has a knife on her side.


Lou is shown to be friendly and welcoming towards others, even Nico di Angelo. She easily gets flustered and blushes a lot. Lou also has an affinity for mischief, as she used her magic to perform various pranks on the other campers.


  • 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.
  • 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 | Iapetus/Bob | 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
    Minor Characters: Rachel Elizabeth Dare | Grover Underwood | Thalia Grace | Clarisse La Rue | 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 | Zombie
    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