The Hephaestus Familia (ヘファイストス・ファミリア) is a large smith type Familia led by Hephaestus.
The Hephaestus brand is well known throughout the world. They are one of the Familia in Orario that don't rely on income from the Dungeon. The Hephaestus brand logo is only allowed on items which are authorized by Hephaestus and her executives and made by Level 2 or higher smiths with the Blacksmith Development Ability. The Familia owns several branch stores in several locations, including the Babel, and rents the 4th to 8th floors of the tower.
The Hephaestus Familia has the right to give all Familia members their own workshop. This is done to prevent a smith's techniques from being seen by others as even within the Familia smiths competed with each other to sell their works.
The familia might be a group of smiths but they are also powerful, which is why they are also called warrior smiths. They have at least 20 smiths who are Level 3 or higher.
The Hephaestus Familia emblem is crossing hammers over a volcano.