Aria, Sonnet and Canon

Aria, Sonnet, and Canon, collectively known as the three sisters or the moon sisters (unofficial name), are three ancient goddesses who, according to Teyvat mythos, served as Teyvat's three moons. Following a certain great calamity, two of the sisters died, and the corpse of only one of the sisters continues to illuminate the night sky.
==Profile==
The three sisters are mythical figures in Teyvat legends who have been mentioned in books and legends from — and in item descriptions related to — Mondstadt, Liyue, and Sumeru. However, very little of their mythos can be confirmed, leaving their significance and role in Teyvat lore a mystery.
Most tales involving them agree that the three sisters lived in the Lunar Palace and switched places in riding their silver carriage (or chariot) at regular intervals. The three sisters were close with each other and were also in love with the "stars of daybreak," but met their end as a result of a great calamity. Stories differ, or do not address, why the sisters died or how many of them died.
==Story==
According to legend, the moon sisters are older than Rex Lapis, who himself is over 6,000 years old. They were the sovereigns of the night sky who dwelled in the Lunar Palace and rode through the heavens in a silver carriage. Sovereignty was held by one sister at a time, switching places three times a month.Instead of saying that the sisters alternated "thrice a month," the original Chinese text says they alternated after , where a xún can mean ten days, ten years, or an unspecified amount of time. The English localization assumed ten days, as thirty days roughly comprises one . The three sisters were all in love with the morning stars, and it is said that their love for the morning stars was "equal" to the affection between the sisters.
===The Ancient Calamity===
At some point, the Lunar Palace was host to the union of a Seelie ancestor and a traveler from afar, with the moon sisters as witnesses. Thirty days later, the calamity that overturned the heavens and earth descended on the world: the lovers went on a self-imposed exile and attempted to flee, but the disaster caught up to them. As punishment, the two were separated for eternity and had their memories wiped. The heartbroken Seelie withered away, shedding parts of their former selves which then transformed into the Seelie's current wispy forms.
Meanwhile, the great disaster overturned the sisters' carriage and ransacked the palace of the stars. According to one tale, the moon sisters turned on each other and killed each other, although other similar legends do not include this detail. Two sisters died, and one of their corpses became the moon in Teyvat's night sky. Around the same time as their deaths, the sun chariot piloted by the morning stars fell into the plains west of Liyue, creating The Chasm and Dunyu Ruins.
It is heavily implied that this disaster is related to Nibelung's great war of vengeance against the Heavenly Principles, which was the same conflict which caused the Seelie to be cursed and exiled.
===Legacy===
Following her sisters' deaths, the last sister was so overcome with sorrow that she never left her palace again.
The morning stars survived the calamities, as did the wolves, who are said to be "children of the moons." The wolves remember the tragedy behind the sisters' tale, and those who live among wolves call the morning stars the "grievous stars." Gods and adepti that heard the story of the moon sisters would "feel sentimental upon hearing such ancient memories."
Nilotpala Lotuses are said to be related to the three sisters, hence why they bloom during nighttime.
The concept of the moon(s) recurs throughout Teyvat lore and shows up both in-universe and in gameplay elements. For example, the names "Mondstadt" and "Liyue" both make reference to the word moon via Mond and Yue, respectively. According to folk legends, the Solar Chariot that fell into The Chasm was repaired by the tribespeople who lived there and eventually returned to the heavens; in other renditions of the tale, the sun chariot was a star which "leaped away" and returned to the heavens during the time "countless gods and rulers fought over the appointed celestial seats."
During the Abyssal invasion of Natlan, Mavuika channeled power from the six modern incarnations of the heroes who fought with her during the cataclysm along with Ronova's power to destroy the rift that was responsible for the invasion. The sheer strength of her strike was potent enough to break through Teyvat's skies, revealing that Teyvat's skies were false along with a shattered moon. However, most of the people paid little heed to it, though Mavuika later disclosed to the Traveler that it was worth investigating, as they had not been observed in any other nation and guessed that the Heavenly Principles wished to keep the matter secret. She hoped that they would not cause her too much trouble over it, and she would simply tell the masses that it was just an "astronomical anomaly."
The Spiral Abyss, a massive underground city built by a ruined civilization, has several deep connections with the moon(s): Within it is a structure known as the Abyssal Moon Spire, in which the moon is clearly visible. The lunar phase within the city shifts twice a month in a phenomenon known as the Moment of Syzygy, which brings new rewards with it, and this change in lunar phase has been referred to as "gears turn[ing]."Official Description: Moment of Syzygy Notably, the moon above Teyvat and the one within the Spiral Abyss are distinct, perhaps suggesting that while one sister's corpse ended up in Teyvat, the other sister's corpse ended up in the Spiral Abyss.
==Trivia==
* The concept of the is common in real-life mythology and may be the inspiration behind the moon sisters.
* The English localization of Moonlit Bamboo Forest (III) states that disaster would befall the world if the three sisters failed to switch places in time. This is a major misinterpretation of the original Chinese text, which says that they continued switching places up until the great disaster descended. (See Moonlit Bamboo Forest § Notes for details.)
** Another notable translation liberty occurs later, with "But this was all before the world was smashed against the tides of great calamity." The original Chinese text says 
* The figure depicted in the Blessing of the Welkin Moon card may relate to the moon sisters. It features an unidentified white-haired, purple-robed feminine figure surrounded by Primogems, with an upright triquetra underneath and a waning crescent moon behind her. The word "welkin" means "sky" or "heaven," making the name of this moon the "Heavenly Moon."
===Etymology===
* The moon sisters' names are related to music and poetry:
** An is a musical composition for a single singer, with or without musical accompaniment. It is most often used in operas.
** A is a type of poetic form closely associated with love poems. It is derived from the Italian word sonetto, meaning "little song."
** A is a compositional form in which the melody is repeated by an imitation after a given duration.
** Both the Chinese and Japanese language patches render Sonnet as "Sonata". This may have been an oversight in localization, as a is a form of musical piece much like an aria and a canon, as opposed to a sonnet, which is a form of poetry.
* In astronomy, "" is the configuration of three celestial bodies in a straight line. One commonly-known type of syzygy is an .
** In the Valentinianism system of Gnosticism, "syzygy" refers to the duo male and female emanations of .
==Gallery==
Teyvat Moon.png|The Moon as seen from Teyvat
Abyssal Moon.png|The Abyssal Moon as seen from Spiral Abyss
False Sky.png|One of the Moons, shattered, behind the false sky.
Shattered_Moon_Behind_the_Sky.png|The fragments visible after the split-sky phenomenon closed.
==Notes==
==Other Languages==
==Change History==
==References==
pt-br:Ária, Soneto e Cânone
fr:Arya, Sandria et Carmen
pl:Aria, Sonet i Kanon