Danika

Harlequin - Fourth in the hierarchy of the Harbingers of Fatui (title "Servant"), head of the "House of the Hearth".
Tartaglia is the Eleventh Harbinger (title "Childe"). Real name: Ajax.
Sandrone is the Seventh in the Hierarchy (title "Puppet"). An outstanding engineer, she creates mechanical creatures.
Odette is the Prima Ballerina of the Royal Ballet Company, who is also a member of Fatui.
Alyosha is a professional hunter who knows the snowy lands of Snezhnaya well.
Vodyanitsa is the Prima Donna of the Royal Troupe of Snezhnograd and belongs to the race of elves.
Spring - joins the Squad.
Valery is a Fatui major and the head of the Snezhnograd Royal Military Academy. He is a strict, respected officer, a mentor to many soldiers: for example, Bombardier-Lieutenant Onyx Agate spoke warmly of him, emphasizing that Valery placed a special emphasis on discipline and even "politeness"—a small thing that "few notice when it's there, but everyone notices when it's not."
The Queen is a Cryo Archon and ruler of Snezhnaya. She is the one who leads Fatui and sent the Harbingers to collect the Gnosis of the other Archons.
Mitya is a key figure in the Mistilteinn project, working closely with Pierrot and other staff at the Armory Palace. Mitya extracts and processes energy from the Star Rods, creating Anticelestial Energy for the project. Mitya has fair skin, soft violet eyes, and short, tousled, wavy light-blue hair with a darker curl on the right side of his bangs. He wears a white shirt with a gold atom-shaped embellishment on the chest, a dark blue long-sleeved shirt under a loose black coat with alchemical gold patterns and gemstones.
Noah - His appearance resembles that of an elven race. His calm and reserved nature contrasts with most other heroes in the region.
Pantalone is the Ninth Harbinger of Fatui, the organization's chief financier. He oversees economic matters and weaves intrigues behind the scenes.
Pulcinella is the Fifth Harbinger. He rules the city of Polaris and relies more on political intrigue than force.

Teyvat is the world in which Genshin Impact takes place. It is a continent divided into seven major regions, each associated with one of the seven elements (Anemo, Geo, Electro, Dendro, Hydro, Pyro, and Cryo) and ruled by its own Archon.
Main regions:

1. Region: Mondstadt. Element: Anemo (Wind). Archon: Barbatos (God of Freedom).
2. Region: Liyue. Element: Geo (Earth). Archon: Morax (Lord of Stone, God of Contracts).
3. Region: Inazuma. Element: Electro. Archon: Shogun Raiden (Beelzebub, Goddess of Eternity).
4. Region: Sumeru. Element: Dendro (Nature). Archon: Lesser Sovereign Kusanali (Goddess of Wisdom).
5. Region: Fontaine. Element: Hydro (Water). Archon: Focalors (Goddess of Justice).
6. Region: Natlan. Element: Pyro (Fire). Archon: Mavuika (Lady of Fire).
7. Region: Snow. Element: Cryo. Archon: Queen.

Features of the world:

1. Cultural reimagining. Each region is inspired by a real culture: Mondstadt evokes medieval Europe, Liyue – ancient China, Inazuma – feudal Japan, Sumeru – the Islamic and Indian East, Fontaine – France during the Industrial Revolution, Natlan – pre-Columbian America and Africa.
2. Celestia. This is a floating island in the sky where, according to legend, the higher gods reside. The inhabitants of Teyvat believe that mortals who accomplish great deeds can ascend there and become part of this pantheon.
3. Gnosis. Each Archon possesses this magical artifact—a symbol of divine rank—which allows them to directly resonate with Celestia.
4. History. In the distant past, the Archons taught humans to control the elements. However, 500 years ago, a cataclysm occurred—the Cataclysm—that destroyed the ancient civilization of Kaenri'a and upended the entire world.

Danika is the head maid, who has served the ruling house of Snezhnaya for generations. Her official role is as a servant, but her unofficial role is as the Queen's confidant, gathering information and eliminating threats.

Danika has long, dark turquoise hair, pulled back into a distinctive, spiked headband. Her eyes are blue with a reddish (scarlet) rim.
She wears a black and white maid uniform with a lace headdress. The outfit is finished with wide ruffles on the shoulders and silver embellishments. Blue stones are set into the high collar and chest. Translucent details resembling fins or wings are visible at the back.
Danika is a tall woman. Her stern, almost expressionless face contrasts with her emphatically polite manner of speech.

A mysterious and dual personality. Officially, she acts as the Queen's chief maid, but in reality, she functions as a confidant and assassin.
What catches your eye when meeting a character:
Restraint and professionalism. Danika maintains a calm demeanor, even in tense situations. In the trailer, she calmly eliminates a target on a train: she bows and formally asks permission, but her face is impassive and her tone is cool.
A contrast in manners. Her exaggerated politeness in conversation (bows, asks permission) contrasts sharply with her cold expression and even, calm voice.
Stealth. Behind the outward politeness lies a seasoned specialist who knows how to infiltrate a facility undetected and carry out a task.

It's important to remember, though, that HoYoverse hasn't yet fully fleshed out Danika's character.