Tha Fatui Harbingers all ranked from 0 (highest/strongest). They seem to have gotten themselves trapped in the abyss, having no knowledge of Tartaglia's past. They only know Skirk as "The Void Star" of the abyss.

Skirk is a mysterious, powerful warrior from beyond Teyvat and the master of Tartaglia (Childe), residing in the deepest parts of thecosmic abyss. She is described as a "solitary maiden" with a master-level mastery of the Abyss, appearing as a young woman with pale skin, long, messy white-lilac hair, and dull fuchsia eyes. Skirk's most striking feature is that her arms and legs are not human; they are prosthetic limbs made of dark purple and cyan crystalline Abyssal energy, stemming from injuries in her childhood. She has long, messy hair, which is whitish-lilac with purple undersides and streaks that fade to cyan. She wears a white dress with purple designs, often paired with a black collar, ribbon, and a headpiece with a light blue feather.Her design is often associated with the "Void Star" theme, and her appearance has been described as a "galaxy-like" or "abyssal" aesthetic.