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Aurum, along with Argentum, is one of Reyna's automaton guard dogs. Aurum is the golden hound, as Aurum is Latin for gold. Aurum has rubies for eyes. Both of the dogs can sense when someone is lying and will attack you if you are.

The Heroes of Olympus[]

The Son of Neptune[]

Principia inside GN

Aurum in the graphic novel

While not having a large role in the book, Argentum and Aurum follow Reyna both times she talks to Percy alone. They seem to dislike Percy greatly, growling at him almost the entire time they are in the same room as him. She warns him that they can tell when people don't tell the truth and that they hate liars, she may say this for intimidation, but anyone in the presence may doubt this because of its razor sharp teeth and protective nature to Reyna and extreme loyalty as well.

The Mark of Athena[]

Aurum and Argentum both appear in the book. They are with Reyna when she talks with Annabeth near the beginning of the book, and when Reyna confronts Annabeth later in the books.

The Blood of Olympus[]

Aurum is summoned along with Argentum while Reyna, Nico, and Coach Hedge are in Pompeii. He detects that Nico is lying when he says he and Thalia Grace are "fine", but Reyna lets it go. When Gaea possesses Coach Hedge and encases summoned ghosts in ash, Aurum joins the fight and even rips off the head off of one. At some point in the fight, Aurum, along with Argentum, disappear. Reyna presumes this may be because they took too much damage to fight anymore.

Reyna summons both dogs again after they arrive in Évora, Portugal. A few days later, Lycaon and his pack of wolves attack the group. Aurum, being made of gold, was ineffective against the attackers. He stood by, frustrated, while Argentum continued fighting. While Nico, Reyna, and Coach Hedge were making their escape, both dogs disappeared again.

Aurum is summoned along with Argentum in San Juan, Puerto Rico. After the fight with Lycaon, even Aurum looked worse for wear. They are placed on guard duty. When Reyna gets worked up over being back in San Juan, Aurum and Argentum pick up on it and begin pacing. After Reyna is knocked out by a dart from the Hunters of Artemis, Aurum and Argentum are deactivated by unknown means, but not dismissed. Reyna, Aurum, and Argentum are taken to the Amazon's secret base, and both dogs are repaired by the Amazons.

In Buford, Georgia, Aurum and Argentum are seen playing with a ball. Nico notes that while they're "frisky and full of energy", it's the opposite of Reyna. Both dogs stop playing and run to Reyna's side when Bryce Lawrence attacks their group. Hedge accidentally steps over a mass grave lined with stones, and multiple skeletons emerge and surround them. When Bryce uses his power over those who break their oaths to control the undead and make them attack Reyna, Aurum and Argentum try to defend her but have their muzzles clamped shut by some of the attackers. When Bryce taunts Reyna, Nico's rage and his powers overwhelmed both dogs, and they "turned in circles, as if their mechanical brains had short-circuited."

Between the Series[]

Camp Jupiter Classified: A Probatio's Journal[]

He and Argentum nearly attack Claudia, a probatio in the Fourth Cohort, after the legacy of Mercury emerges from a secret passageway in the daughter of Bellona's office. About two weeks later he and Argentum join Reyna in tailing Claudia.

The Trials of Apollo[]

The Tyrant's Tomb[]

Aurum and Argentum are seen at the praetor house and are fed jellybeans by Meg McCaffrey.

The following day he and Argentum join the quest and happily jump into the bed of their pickup truck. When they arrive the two follow Meg into the foliage. The two stare at Apollo while Reyna laughs at his romantic proposal. The two then catch ravens after they fall out of the sky. The they stand guard over their injured owner when she breaks her leg in a fall and follow her after Lavinia Asimov has a satyr knock her out so she can heal.

Both pets are seen for the last time accompanying Reyna and the rest of the hunters leaving the camp in search of the Thaumesian Fox.

Trivia[]

  • Aurum is the only automaton in both series to be made entirely of gold.
  • Aurum and its counterpart, Argentum, may have been modeled after King Alcinous's gold and silver guard dogs, mentioned in Book Eight of The Odyssey.
  • Aurum means gold in Latin.
  • Aurum is not considered a weapon, as he is allowed to enter New Rome, but as Annabeth noticed, Aurum and Argentum could easily tear her apart with their sharp metal teeth.

Gallery[]

Items
Personal Weapons: Riptide | Annabeth's Knife | Backbiter | Master Bolt | Poseidon's Trident | Nico's Sword | Thalia's Spear | Aegis | Ares' Sword | Ares' Shield | Caduceus | Apollo's Golden Bow | Silver Bow | Artemis' Knives | Hades' Sword | Hades' Staff | Kronos' Scythe | Ivlivs | Katoptris | Hazel's Spatha | Frank's Spear | Reyna's Spear | Juno's Gladius | Annabeth's Sword | Sumarbrander | Gungnir | Gjallar | Mjolnir | Gríðarvölr | Khopesh | Mallory's Serrated Knives | Meg's Twin Imperial Gold siccae blades | Thyrsus | Hecate's Torches | Minotaur's Axe | Leroy's Sword | Tyson's Javelin | Alex's Garrote Wire | Piper's Sword
Magical Items: Annabeth's Yankees Cap | Helm of Darkness | Pandora's Pithos | Winged Shoes | Golden Fleece | Flying Chariot | Golden Apple | Apples of Immortality | Greek Fire | Hermes' Multivitamins | Nectar and Ambrosia | Stygian Ice Whistle | Keys of Hades | Leo's Magical Toolbelt | Serapis' Staff | Magic 8 Ball | Arrow of Dodona | Pig Ball | Mechanical Spider | Angel Statues | Athena Parthenos | Chiron's Wheelchair | Diocletian's Scepter | Flaming Dodgeball | Gleipnir | Poseidon's Pearls | Queen Hippolyta's Belt | Mistletoe Arrow | Frank's Stick | Expand-o-Duck | Caligula's Caligae | Ran's Net | Rune Stones | Nábrók | Pomegranate
Spoils of War: Minotaur's Horn | Medusa's Head | Kampê's Scimitars | Nemean Lion's Pelt | Gorgon Blood | Cornucopia | Lydian Drakon Hide | Phineas' Robe and Slippers | Triptolemus's Almanac | Odysseus' Astrolabe
Items: Camp Necklace | Chameleon Armor | Daedalus' Laptop | Golden drachma | Denarius | Red Gold | Mark of Athena | Thalia's Shield | Video Shield | Wristwatch Shield | Golden Mango | Sibylline Books | Letter of Recommendation
Ships Amos' Boat | Argo II | CSS Birmingham | Egyptian Queen | Julia Drusilla Yachts | Pax | Queen Anne's Revenge | Reed Boat | Naglfar | Gorgyra's Canoe
Blessed Metals: Adamantine | Celestial Bronze | Imperial Gold | Stygian Iron | Bone Steel
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 | Lycaon
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
The Trials of Apollo
Core Series: The Hidden Oracle | The Dark Prophecy | The Burning Maze | The Tyrant's Tomb | The Tower of Nero
Main Characters: Apollo/Lester Papadopolous | Meg McCaffrey | Percy Jackson | Peaches | Leo Valdez | Calypso | Grover Underwood | Piper McLean | Jason Grace | Reyna Ramírez-Arellano | Frank Zhang | Hazel Levesque | Lavinia Asimov | Nico di Angelo | Will Solace | Rachel Elizabeth Dare
Secondary Characters: Chiron | Austin Lake | Kayla Knowles | Hemithea | Josephine | Georgina | Lityerses | Trophonius | Gleeson Hedge | Mellie | Chuck Hedge | Medea | Herophile | Crest | Don | Tyson | Ella | Tarquin | Luguselwa | Claudia | Janice | Blaise
Minor Characters: Sally Jackson | Thalia Grace | Mrs. O'Leary | Festus | Cade | Mikey | Harley | Connor Stoll | Miranda Gardiner | Cecil Markowitz | Ellis Wakefield | Sherman Yang | Damien White | Malcolm Pace | Paolo Montes | Valentina Diaz | Germani | Agamethus | Olujime | Phillip McCaffrey | Hunter Kowalski | Sssssarah | Prickly Pear | Aloe Vera | Joshua | Naevius Sutorius Macro | Incitatus | Tristan McLean | Bombilo | Aurum | Argentum | Julia | Jacob | Dakota | Poison Oak | Screech-Bling | Annabeth Chase | Elon | Mamurius Veturius | Mimi
Olympian Gods (Greek & Roman): Zeus/Jupiter | Hera/Juno | Poseidon/Neptune | Demeter/Ceres | Ares/Mars | Athena/Minerva | Apollo/Apollo (Roman) | Artemis/Diana | Hephaestus/Vulcan | Aphrodite/Venus | Hermes/Mercury | Dionysus/Bacchus | Hades/Pluto
Minor Gods: Nero | Commodus | Caligula | Iris | Britomartis | Styx | Terminus | Lupa | Terpsichore | Harpocrates | Cardea
Titans: Rhea | Leto | Mnemosyne | Helios
Monsters and Magical Creatures: Python | Nosoi | Karpos | Palikos | Myrmekes | Colossus Neronis | Blemmyae | Gryphon | Carthaginian Serpent | Scythian Dracaena | Cynocephali | Centaur | Cyclops | Yale | Satyr/Faun | Strix | Dryad | Dragon | Pandai | Eurynomos | Skeleton Warriors | Vrykolakai | Khromandae | Amphisbaena | Troglodyte | Tauri Sylvestres
Related Content: Rick Riordan | Percy Jackson and the Olympians | The Heroes of Olympus | Demigods & Magicians | Camp Half-Blood Confidential | Camp Jupiter Classified: A Probatio's Journal | Percy Jackson Demigod Collection | Un Natale Mezzosangue | The Sun and the Star: A Nico di Angelo Adventure
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