Nightskin

For, when the Viltis Glaive struck down the creature that wielded the stars as weapons, they dropped their satchel of fiery weapons and... from those sparks, the Nightskinned emerged.

• The Material's Children tell the tale of the Nightskins birth and creation.

Nightskins are a race born exclusively to Thysia after the death and locking away of the gods during The myth of the Uprising. The stories state that these creatures were born from the stars wielded by a god of the night, as the god was smote upon the ground by The Viltis Glaive, they scattered their stars and, from the fast cooling lights, the Nightskins emerged. 
The Nightskin are known throughout Thysia for their inherent link to celestial magic and their natural inclination towards the stars as both soothsayers and skilled navigators, this has led to the Nightskins becoming skilled and highly sought after sailors and pirates (especially in the nation of Thalasia where The Stargell family have drawn fame and notoriety as the most famous of Nightskins). Though they are also unnaturally attuned with the nature of Soul Arms and so can also be found in The Oracanium working with the scholars there. 
However, the most telling feature of Nightskins emerges when they manifest their guiding star, a unique ability reserved only for powerful Nightskin adventurers. Those nightskins manifest the star signs they were born under as their eyes take on a white light and their skin becomes starry and ever-shifting as they take on more power in battle.