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Hephaestus's cabin (#9) is for the children of Hephaestus, the god of blacksmiths and fire.


The cabin is made of brick and has a smokestack sticking out of it, like a tiny factory or an oversized motor-home.

The inside of Hephaestus's Cabin in the graphic novel

The entrance is like a vault door, circular, and of thick metal. It opens with a lot of gears turning and smoke hissing. It has shiny metal walls and metal slatted doors. It is noted for being unclean and messy, filled with junk and machines often.  There is a tunnel underneath it. There are only three Hephaestus demigods at the end of the war with the Titans because of Charles Beckendorf's death. In The Lost Hero, their numbers have risen to about a dozen boys and girls, although none of them look alike.

Leo's bunk in the graphic novel

The steel bunks are folded against the wall and have a digital control panel, blinking LED lights, glowing gems, and interlocking gears. In the graphic novel, the bunks are against the wall and have curtains. Leo's bunk, Beckendorf's old bunk, has a built-in game station at the footboard, a stereo system in the headboard, a glass door refrigerator at the base, and a whole bunch of control panels running down the sides. The beds retract to a private room in the basement. A fire pole comes down from the second floor even though the cabin doesn't appear to have a second floor from the outside. A circular staircase leads down to the basement, power tools, an assortment of weapons, a workbench and a lot of scrap metal.

Known Occupants

Leo Valdez, the former counselor

Mechanical Items


Hephaestus, their father.

  • They are all expert builders.
  • They are all mechanics.
  • Technokinesis: As children of Hephaestus, they can control and manipulate machines.
    • Can sense machines, mechanics, or metal.
    • Can identify machinery type and use by touch.
    • Can sense faults in metal ore.
  • Can find and sense traps in the ground.
  • Pyrokinesis: Some children of Hephaestus have control over fire, a rare ability that Hephaestus blesses his children with every few hundred years, since the last demigod Hephastus blessed caused the Great Fire of London. The only living demigod with this ability is Leo Valdez.


  • Hephaestus' cabin is tied with Apollo's cabin for the most named inhabitants, with 8 each.
  • They have the most counselors in The Heroes of Olympus.



1st: Zeus Jason Grace | Thalia Grace (Temporarily)
2nd: Hera None: "Hera doesn't run around having affairs with mortals. That is her husband's job."
3rd: Poseidon Percy Jackson | Tyson
4th: Demeter Katie Gardner | Miranda Gardiner | Meg McCaffrey | Billie Ng
5th: Ares Arnold Beefcake | Clarisse La Rue | Sherman Yang | Mark | Ellis Wakefield
6th: Athena Bea Wise | Annabeth Chase | Malcolm Pace
7th: Apollo Lee Fletcher | Michael Yew | Will Solace | Kayla Knowles | Austin Lake | Yan | Gracie | Jerry
8th: Artemis Hunters of Artemis
9th: Hephaestus Charles Beckendorf | Jake Mason | Leo Valdez | Nyssa Barrera | Christopher | Harley | Shane
10th: Aphrodite James Dean | Silena Beauregard | Piper McLean | Drew Tanaka | Lacy | Mitchell | Valentina Diaz
11th: Hermes Luke Castellan | Connor Stoll | Travis Stoll | Chris Rodriguez | Cecil Markowitz | Alice Miyazawa | Julia Feingold
12th: Dionysus Castor | Pollux
13th: Hades Nico di Angelo
14th: Iris Butch Walker
15th: Hypnos Clovis
16th: Nemesis Damien White
17th: Nike Laurel Victor | Holly Victor
18th: Hebe Paolo Montes
19th: Tyche Chiara Benvenuti
20th: Hecate Lou Ellen Blackstone