Genshin and Region 8.

Khaenri'akh is an ancient kingdom that did not worship the Archons and built its power on technology and alchemy. Its fall is one of the most significant disasters in the game's lore.

What happened:

Curse and Transformation. Due to forbidden knowledge and experiments with power, the world "broke": some inhabitants turned into monsters, others into immortal but cursed beings (like the Knights of the Black Serpent).
The destruction of the state. The kingdom was destroyed in a cataclysm that ravaged all of Teyvat. Its ruins and legacy remain dangerous: the machinery continues to function, and the curse spreads.
Connection to the Void. It's believed that Kaenri'ah's experiments breached the boundary between worlds and opened a channel for Void energy. This means the Void didn't just come "out of nowhere"—it was let in, and now it feeds on the remnants of this civilization.
"villain," but about how her power and path intersect with this destructive energy:

Originating from another world. Lumin and Eather are travelers between worlds, and the very mechanics of their power resonate with that which breaks boundaries: they shift elements, interact with the remnants of ancient powers, and often find themselves in places where the fabric of the world is thin.
Contact with the remnants of Kaenri'ah. As the story progresses, Lumine encounters Kaenri'ah's legacy and those who wield the power of the Void (including the Order of the Void). This makes her both a target and a potential tool for both sides.
The contract/power they offer her. There are hints in the lore that the Order of the Abyss wants to use Lumine as a vessel or conduit, because her transdimensional nature allows them to channel this power.
Moral contrast. Lumine constantly faces a choice: use this power for a purpose or resist it. Her connection to the Void is both a source of strength and a major danger, as the price can be too high.

The Abyss isn't just a "hole in the ground," but a distinct, hostile force, a kind of antithesis to the order established by the Archons and Celestia. It can be described as a distorted energy that corrodes the world and transforms beings.
It distorts reality and living beings. Those who remain in contact with the Abyss for long periods of time are transformed: they develop strange abilities, but at the same time, their aggression grows and their humanity is lost. This is the source of the Abyss monsters, the twisted knights, and other enemies.
It undermines the order of regions. The Abyss acts like corrosion: it finds weak points (old conflicts, grievances, secrets) and amplifies them to undermine the region's foundations.
Grants strength at the cost of destruction. Some characters gain power from the Abyss (for example, through contracts or artifacts), but this almost always comes with pain, loss of control, and the risk of becoming a threat to their own.
Creates "rifts" and anomalies. These include dungeons, special zones where the laws of the world operate differently, and even entire hidden spaces like the Spiral Abyss—a testing arena where the power of the Abyss is specifically "tuned" to test fighters.

Iter
Appearance. A slender young man with light hair braided into a long braid with a feather at the end; golden eyes. He wears a dark suit in brown and black tones with gold details: a crop top, pants, elbow-length gloves, and high boots. The main detail of his appearance is a white cape-scarf with gold trim and a glowing insert on the chest (its color changes depending on the current element). He wears a long earring in his left ear.
Weapon: One-handed sword. In the opening cutscene, he also summons white-gold wings, but in game combat, he uses the blade.
Powers. Eather doesn't have the Eye of God: he resonates with the Archon statues and absorbs their elements (Anemo, Geo, Electro, Dendro, etc.). His abilities work by "absorbing" elements: for example, a whirlwind or tornado can additionally deal damage of the element they come into contact with. As he masters the elements, he gradually restores his original interdimensional power.
Paimon
Height and build: Tiny, about the size of a palm, she looks like a miniature fairy.
Face: round, with large expressive eyes and a sweet smile; features are soft, childish.
Hair: light, almost white, voluminous, like a cloud; hairstyle is neat, with light curls.
Clothing: a white and beige outfit with golden details, reminiscent of a suit with a cape; lots of small jewelry and ribbons.
In flight: It hovers smoothly, without visible wings - it seems as if it is simply "hanging" in the air and moves very lively, as if jumping.
A guide and narrator. She explains mechanics, regional rules, important plot details, and gives you directions. It's often from her that you learn what's going on.
Commentator. Reacts to events, jokes, expresses indignation, joy, and emotionally reacts to everything—this sets the tone for the dialogues and makes them more lively.
Navigator. Helps maintain focus in dialogues and quests: if something is important, Paimon will definitely highlight it.

Tartaglia is in debt; a young man in a stylish battle outfit with red accents; a bow (and switches to close combat in battle); Hydro.
Arlecchino ("Servant") - cold-blooded, demanding; elegant in a black and scarlet suit, with an emphasis on severity and strength; spear; Pyro.
Columbine ("Soubrette") - aloof, frighteningly calm; a girl in the image of a "theatrical doll", with ribbons and a detailed mask; a one-handed sword; Cryo (according to the lore; game status/details are subject to change).
Pulcinella ("Little Chicken") - calculating, political; an elderly man in a strict uniform with elements of court style; catalyst; Cryo.
Sandrone ("The Puppet") - science-obsessed, cold; a woman in an engineering outfit, next to an automaton; catalyst; Electro.
Pantalone ("Businessman") - pragmatic, powerful; mature man in a luxurious "business" suit; one-handed sword; Cryo.
The Queen is majestic, merciless to the Heavenly order; a stately woman in icy robes, surrounded by vortices of frosty energy; a spear; Cryo (Archon).
Varka is a strong-willed, charismatic man; a tall, strong man, typical of the Grand Master of the Ordo Favonius; weapons and God's Eye are unknown (not a playable character).
Columbine - cold-blooded, mysterious; a graceful girl with doll-like features, dressed in a dress with ribbons and masks; weapons and God's Eye - unknown (Harbinger, non-playable character).
Nicole - Erudite, calm; female researcher, academic style with books and maps; weapons and God's Eye - unknown (NPC from the Book of Revelation).
Alice is an eccentric, inventive; bright, energetic woman, a "scientist adventurer" type with blueprints and gadgets; weapons and God's Eye are unknown (Klee's mother, NPC).
Fleance is not a canon character in Genshin Impact (possibly due to name confusion or other fan context).
Aino, Yagoda - they are not on the official list of characters or notable NPCs.
Durin is a massive dragon associated with Mondstadt; not human, lacking weapons and the Eye of God; character - fierce, destructive; appearance - a massive dragon with dark scales.

Mavuika - determined, fiery; fiery-red-haired warrior in a striking black suit with fiery motifs; two-handed sword; Pyro (Archon).
Kinich - cold-blooded, pragmatic; a young man with turquoise locks of hair and a headband, vertical pupils, a small dragon companion hovering nearby; a two-handed sword; Dendro.
Kachina - persistent, cheerful; a petite girl with round ears, in a beige and orange outfit with geometric patterns; spear; Geo.
Mualani - cheerful, superstitious; a dark-skinned, tattooed girl riding a surfboard, wearing a headband with "ears"; catalyst; Hydro.
Sitlali - wise, aloof; a girl with a violet-blue palette and triangular markings on her skin, multi-layered robes; catalyst; Cryo.
Chaska - reserved, noble; a tall girl in burgundy and purple tones, the main detail is a large hat; bow; Krio.
Shilonen - calm, skilled; a girl with leopard ears and tail, in an open dress with diamonds and massive jewelry; one-handed sword; Geo.
Ororon is a quiet, observant young man with pointed ears, wearing dark clothing with turquoise accents and patterns on his body; bow; Anemo.
Iansan - energetic, collected; a girl with white hair and a beast-head mask, in a black, brown and purple outfit; spear; Electro.
Emilia - sophisticated, mysterious; an elegant perfumer with floral details and refined lines; spear; Dendro.

Furina - dramatic, emotional; a striking lady with theatrical details and a contrasting palette; one-handed sword; Hydro.
Charlotte is energetic, goal-oriented; a journalist in a practical outfit with accessories for reporting; a catalyst; Cryo.
Navia - decisive, noble; leader in an elegant battle suit with geological motifs; two-handed sword; Geo.
Chevreuse - principled, collected; patrol commander in a uniform with a laconic silhouette; spear; Pyro.
Lini is a charismatic, artistic, elegant illusionist in a stage outfit with an emphasis on red; bow; Pyro.
Linette - reserved, observant; petite assistant with a cat-like appearance; one-handed sword; Anemo.
Freminet - quiet, reserved; a young man in diving gear with marine details; a two-handed sword; Cryo.
Neuvillette - impartial, majestic; a stern judge in ceremonial robes; catalyst; Hydro.
Risley - stern, fair; an imposing prison warden in dark formal attire; catalyst; Cryo.
Clorinda - cold-blooded, flawless; a judicial duelist in a strict outfit with accents on the blade; one-handed sword; Electro.
Tiori - Stylish, independent; a fashion designer with sharp lines and fashionable details; one-handed sword; Geo.
Emilia - sophisticated, mysterious; a perfumer in an elegant dress with floral and perfume details; a spear; Dendro.
Sidgwin - caring, gentle; Melusine the nurse in an image that combines the marine and medicinal; bow; Hydro.
Escoffier - collected, professional; chef in stylish chef's outfit; spear; Cryo.

Kirara - diligent, friendly; nekomata courier in a box-and-ribbon outfit; one-handed sword; Dendro.
Mizuki is sensitive and attentive; a girl with ethereal details in her appearance, as if from the spirit world; a catalyst; Anemo.
SUMERU
Nahida is a girl in delicate green and gold robes; a catalyst; Dendro (aka Dendro Archon).
Tignari - responsible, strict; a young man with ears and a tail, in forest gear; bow; Dendro.
Colley - diligent, vulnerable; a girl in a practical outfit with a hood and fur details; bow; Dendro.
Saino - cold-blooded, ironic; general in stylized combat clothes with jackal motifs; spear; Electro.
Al-Haytham is a level-headed, independent man with an elegant appearance, wearing a sophisticated suit with graphic details and wielding a one-handed sword. Dendro.
Nilu - dreamy, artistic; graceful dancer in flowing floral dresses; one-handed sword; Hydro.
Dori is a lively, calculating woman; a petite merchant in bright oriental clothing; a two-handed sword; Electro.
Layla - Shy, hardworking; a student in a cozy outfit with a cape and star details; one-handed sword; Cryo.
Kandakia - noble, steadfast; warrior in an outfit with desert and protective motifs; spear; Hydro.
Faruzan - erudite, meticulous; scholar in multi-layered clothing with mechanical details; bow; Anemo.
Dehya - straightforward, reliable; mercenary in battle attire with fiery accents; two-handed sword; Pyro.
Kaveh - emotional, idealistic; architect in loose clothing with architectural details; two-handed sword; Dendro.
The Wanderer (Scaramuccia) - cynical, proud; a slender young man in a multi-layered outfit with floating elements; catalyst; Anemo.
Sethos - collected, purposeful; a young man in an outfit that combines desert and temple motifs; bow; Electro.

Ka Ming - goal-oriented, warm; young fighter in Lion Dance attire; two-handed sword; Pyro.
Lan Yan - humble, skilled; a craftswoman in practical clothing with woven details; catalyst; Anemo.
Xian Yun - ironic, wise; Cloud Guardian adept in the form of an elderly mentor; catalyst; Anemo.
INAZUMA
Raiden (Shogun) - unyielding, majestic; woman in dark purple robes with electro-tomoe motifs; spear; Electro.
Yae Miko - cunning, ironic; a priestess in a fox-themed outfit with puffy sleeves; a catalyst; Electro.
Kamisato Ayaka - noble, reserved; graceful girl in a white and blue kimono with ribbons; one-handed sword; Cryo.
Kamisato Ayato - calculating, elegant; a man in a refined suit with a fan as a detail of his image; one-handed sword; Hydro.
Kaedehara Kazuha - calm, poetic; a young man in the light clothes of a wandering samurai with red accents; one-handed sword; Anemo.
Yoimiya - cheerful, creative; a girl in a bright outfit with firework details and a ribbon in her hair; bow; Pyro.
Arataki Itto - noisy, passionate; a large man in the oni style, with horns and flashy jewelry; a two-handed sword; Geo.
Goro - loyal, straightforward; general with wolf ears and tail, in battle armor; bow; Geo.
Sangonomiya Kokomi - caring, responsible; priestess in flowing sea robes with pearl details; catalyst; Hydro.
Kujo Sara - strict, dutiful; female general in armor with bird motifs; bow; Electro.
Sayu - sleepy, stubborn; a small ninja in a voluminous kimono and with a fan; a two-handed sword; Anemo.
Shinobu (Kuki Shinobu) - collected, pragmatic; a girl dressed as something between a temple priestess and a street thug; one-handed sword; Electro.
Heizo - energetic, observant; a detective in light clothes with elements of a traditional cut; a catalyst; Anemo.
Toma - friendly, reliable; a man in a practical outfit with fiery details; a spear; Pyro.
Tiori is stylish, independent, and a designer in an elegant outfit with sharp lines and cutout details;

Zhong Li is a wise, reserved man, a stately man in formal dark clothes, a spear, and Geo (he is also an Archon, the Lord of Stone).
Ning Guang - ambitious, calculating; an elegant lady in a luxurious dress with a high collar; catalyst; Geo.
Ke Qing - stubborn, hardworking; a girl in a stylish "battle" suit, with her hair pulled back; one-handed sword; Electro.
Xiao - withdrawn, devoted to duty; a young man with feather decorations and dark markings, a tired look; spear; Anemo.
Gan Yu - shy, diligent; half-adept with horns, in a blue and white outfit; bow; Cryo.
Hu Tao - eccentric, cheerful; a girl in a funeral home outfit, with a bright detail - a hat; a spear; Pyro.
Xiangling - energetic, passionate about food; young cook with pigtails and an apron; spear; Pyro.
Xing Qiu - polite, romantic; a young man in the style of a "book knight", with a fan as a detail of the image; one-handed sword; Hydro.
Bei Dou - daring, fearless; captain in naval gear, with an imposing figure; two-handed sword; Electro.
Yan Fei - straightforward, fair; a lawyer with fire motifs in her clothes and a horn-shaped hair clip; catalyst; Pyro.
Xin Yan - rebellious, optimistic; leather-clad rocker with a guitar as part of her style; two-handed sword; Pyro.
Yun Jin - refined, collected; opera performer in a stage outfit with traditional patterns; spear; Geo.
Chun Yun - diligent, clumsy; exorcist in traditional costume, with a characteristic hood; two-handed sword; Cryo.
Qi Qi - quiet, absent-minded; zombie girl in a pharmacist outfit, with a leaf on her forehead; one-handed sword; Cryo.
Shen He - aloof, noble; adept in white and blue robes with long ribbons; spear; Cryo.
Ye Lan - mysterious, passionate; a woman in a spectacular outfit, as if between a spy and an artist; bow; Hydro.
Bai Zhu - caring, mysterious; a healer in light clothes, with the snake Chang Sheng on his shoulder; catalyst; Dendro.
Yao Yao - sweet, responsible; young student in a light outfit with bamboo elements; spear; Dendro.

Djinn is responsible, selfless; a tall blonde in knight's armor; a one-handed sword; Anemo.
Diluc is a cold-blooded, principled man, a tall man with scarlet hair and a dark suit, wielding a two-handed sword and carrying Pyro.
Kaeya - charming, secretive; blue-haired man in elegant attire; one-handed sword; Cryo.
Lisa is a flirtatious, intelligent, graceful, curvy girl with dark curls; a catalyst; Electro.
Barbara - cheerful, caring; sweet girl in a pink and white pastor's outfit; catalyst; Hydro.
Noelle - Hardworking, dreamy; maid girl with a fighting spirit; two-handed sword; Geo.
Bennett - Unlucky but optimistic; short guy with red hair; one-handed sword; Pyro.
Amber is an energetic, outgoing, red-haired girl in a flight suit; bow; Pyro.
Fischl - dramatic, eccentric; gothic style girl with a raven; bow; Electro.
Sucrose - A shy, science-minded petite girl with ears and a ponytail; a catalyst; Anemo.
Albedo - calm, inquisitive; slender young man with ash-blond hair; one-handed sword; Geo.
Eola - proud, independent; tall girl with silver hair; two-handed sword; Crio.
Klee - mischievous, explosive; a little girl with a fiery personality; catalyst; Pyro.
Venti - carefree, poetic; a young man with turquoise braids and wings; bow; Anemo.
Razor - Wild, loyal; wolf-like; two-handed sword; Electro.
Rosaria - aloof, dangerous; tall woman in monastic combat attire; spear; Cryo.
Mika - modest, diligent; a young man in a scout's outfit; a spear; Cryo.