The Twins, better known as Hestia and Styx, are the two moons of the Dragonrealm. Hestia is described as female and the stronger of the two, leading her brother Styx across the sky. Their perihelion occurs in autumn.
The two moons are intimately connected with the magic of the Dragonrealm and are often involved with dark sorcery. They are referred to as "hungry" for sacrifice. Most significantly, the conjunction of The Twins was needed for the spell of Final Winter and its variations, to either begin or prematurely end the spell.