Hestia[]
Hestia and Hephaestus shared a deep bond during their times in Heaven. Hestia was the only God who acted normal towards her, even after seeing her right eye which resulted in everlasting friendship. However, Hephaestus still gets angry at her for her laziness, especially when she freeloaded at her Familia, but still provided a room in an abandoned church. Hephaestus still shows concern for Hestia from time to time, even accepting her request to make Hestia Knife for Bell with her own hands.
When Apollo accused Bell of initiating the brawl, Hephaestus intervened by saying that her child, Welf, was the one who started it. However, Apollo pointed out that Hephaestus was just covering for her friend and also pointing out their well-known friendship.
Welf Crozzo[]
Hephaestus recognized Welf's talent but didn't think that highly of his decision to not make Magic Swords. Her words are what caused Welf to throw away that decision and make Magic Swords to help his Familia members.
Hephaestus fell in love with Welf after seeing him not be disturbed by her right eye. She loves him so much that she forced Tsubaki Collbrande to listen to her speak fondly about Welf.
Tsubaki Collbrande[]
Tsubaki is the captain of Hephaestus Familia, to whom Hephaestus confides everything. Though she maintains a dignified manner towards Welf and others, she opens up freely towards Tsubaki in her personal quarter, forcing her to listen to the story of Welf for more than seven times.