Vulcanus stands among the six Jupiter Sisters, goddesses bound by equality and shared divine power. Her telekinetic mastery allows her to manipulate objects at will and embed her essence within them, channeling sensory information from her environment. Centuries ago, she joined her sisters in sealing Old Hell through a sacrificial act that birthed New Hell. When the seal fractured mysteriously, the goddesses sought refuge within human hosts whose personalities mirrored their own, though Vulcanus’s chosen vessel remains unidentified.

The sisters’ strength relies on their unbroken unity; the loss of any member weakens their collective power, requiring a new guardian cohort to restore balance. Vulcanus’s precision in controlling numerous objects simultaneously reflects her resolute will. However, like her siblings, her abilities falter under negative emotions such as anger—a flaw intertwined with her host’s mental state. Tasked with recapturing escaped spirits and guiding her host, she upholds duties rooted in her celestial origins.

The Jupiter Sisters originated as six mortal priestesses selected by heavenly forces, later ascending to inherit divine roles and names. Vulcanus draws her identity from the Roman deity Vulcan, son of Jupiter and Juno, cementing her place within the group’s mythic framework. Ancient Caryatid-inspired statues mirror their original forms, hinting at their timeless presence. When inhabiting hosts, subtle physical traits—shifts in eye shape, stature, or skin tone—betray their divine influence, blending goddess and mortal without erasing either.