Skirk

Birthday: November 5th
Gender: Female
Weapon: Sword
Vision: Cryo
Titles: Void Star, Sinner's Pupil, Fool's Master
Constellation: Crystallina
Regions: Abyss, Fontaine, Nod-Krai
Affiliation: Cosmic Calamity

A mighty warrior of unknown origin. She claims to be the disciple of Surtalogi "The Foul," one of Khaenri'ah's Five Sinners, and the master of "Childe" Tartaglia.

A mysterious swordswoman hailing from beyond the skies, she was Tartaglia's master during his time in the Abyss and is the disciple of Surtalogi, one of the Five Sinners of Khaenri'ah.

Skirk wears a sleeveless and backless black strapped leotard under a white and lavender strapless short dress. She wears detached sleeves made of a white frilly fabric and long white ruffled cape.

She has a black head piece on the left side of her hair with some blue structures similar to feathers decorating it. She has a "bracelet" made of several purple crystalline shards of abyssal energy around her left wrist as well as metallic silver structures decorating her "feet".

When Skirk first appeared in the Archon Quest Masquerade of the Guilty, she donned a slightly different outfit. It was mostly similar to her current fit, but it a black scarf around her neck and front; a shorter white dress at the front, which exposed her inner black body suit; and modified cape. This outfit briefly reappeared in her Story Quest Whispers Betwixt Stars and Night, when they escape an Abyss domain after Skirk was injured. She explained that her outfit is kind of a container for Abyssal energy, and when it has such energy, it appears as normal; and when it runs out, it reverts to the scarfed form.

(Source: Genshin Impact Wiki)