Come on joker boy. I'll show you around.

–Nyssa, showing Leo Valdez around Cabin 9, Hephaestus' Cabin

Nyssa Barrera is a demigod daughter of Hephaestus. She was temporary Head Counselor of the Hephaestus' Cabin while Jake Mason was recovering from his injuries.

The Heroes of Olympus

The Lost Hero

Nyssa is temporary head counselor while Jake Mason is recovering from his injuries. When Leo Valdez arrives at the forge in Camp Half-Blood, she explains to him about the curse that's been plaguing their cabin since the past head counselor Beckendorf died and how they lost the dragon. She is later seen when Leo comes back from his quest and is one of the people to congratulate Leo on becoming the senior counselor of the cabin.

The Trials of Apollo

The Hidden Oracle

Nyssa and Harley did not participate in the three-legged race, for they were in charge of it. When Leo returns to Camp Half-blood, all the campers take turns "greeting" him. Nyssa slaps Leo and berates him in rapid Spanish.


Leo describes her saying she looked like "one of those female action heroes, except for that smiley face band-aid on her chin." She is described as wearing a tank top and a red bandana to tie back her dark hair. She is also mentioned as having coco-brown skin.


  • ADHD: Like most demigods, she possesses inborn supernatural battle reflexes and senses that she uses to analyze the fighting style of her opponent.
  • Dyslexia: Her brain is 'hardwired' to Ancient Greek.
  • Bilinguial: She is also known to speak Spanish, as shown in The Hidden Oracle.

Demigod Abilities

As a child of Hephaestus, she has the following abilities:

  • Technokinesis: As a daughter of Hephaestus, she can manipulate machines.
    • She is an expert mechanic.
    • She can sense machines, mechanics, or metal.
    • She can identify machinery type and use by touch.
    • She can sense faults in a metal ore.
  • She can find and sense traps in the ground.
  • She is an expert builder.
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 Avila Ramírez-Arellano | Nico di Angelo | Gleeson Hedge
Minor Characters: Rachel Elizabeth Dare | Thalia Grace | Octavian | Fleecy | Dakota | Ella | Tyson | Mrs. O'Leary | Arion | Hylla | Bob | Calypso | Lou Ellen Blackstone | Halcyon Green | Dr. Howard Claymore | Alabaster C. Torrington
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 | Pomona | Aquilon | Hercules | Cupid | Auster | Favonius | Letus | Victoria | Orcus
Giants: Enceladus | Porphyrion | Alcyoneus | Polybotes | Ephialtes | Otis | Damasen | Clytius | Mimas | Orion | Hippolytus | Thoon | Periboia
Undead: Medea | Midas | Lityerses | Gray | Phineas | Otrera | Echo | Narcissus | Sciron | Pasiphaë
Primordial Gods: Gaea | Tartarus | Ourae | Nyx | Chaos | Ouranos | Akhlys | Erebos | Hemera | Elpis | Spes
Related Content: Rick Riordan | Percy Jackson and the Olympians | Demigods and Monsters | 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
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