Theory: Childe is the third descender and the Tsaritsa is the first Angel
Or at least related to him.
Childe's namesake, Ajax is related to Ajax the Hero who is similar to the Saarelainen, whose ending being separated into 7 pieces aka the Gnosis.
And the Tsaritsa is Koitar who is gathering the Gnosis to revive him.
Theory on why Tsaritsa is Koitar:
Dainsleaf mentioned that the Cryo Archon has no love left for her people nor her people have any left for her.
Who are her people? Fatui and Snezhnayans?
The harbingers may be self-serving, with most of the fatui following their harbinger' commands. However, we occasionally come across some fatui officer or Snezhnayans who put the Tsaritsa above others or loyal to her. Plus, it's hard to imagine the entirety of a country having no love for their leader, much less a god of their country.
But what if her people is not Fatui or Snezhnayan? What if it's Hyperborean, seelie or fae because these are the group associated with the first angel?
The successor of Hyperborean, Frostmoon Scions are not part of Snezhnaya and butted heads with the Fatui. Based on Flins's note about the Tsaritsa, it suggests that the fae do not call her The Majesty, The Tsaritsa, albeit he jokes that 'we' here refers to The Light keeper. The seelies also are mostly mindless now.
Thus there's a high probability that her \\\*people\\\* mentioned are not the Snezhnayans, rather a group that has died off and thus cannot not love her as they have died. Add in the fact that part of her curse is to have her memory wiped, that could affect her in the way that she cannot love her people \\\*as she also cannot remember them\\\*. But I'm more impartial that her people are the hyperboreans that were fully extinct.
\\\*Spoiler\\\*
In 6.3, we went to the first Angel's prison in Amsvartnir and found out that the first Angel remembered her husband and her kin's fate during her time with Boreas.
Currently, the prison is \\\*empty\\\*. In the third note of ancient handwriting, it suggests that she return to her own land and waited for the freedom of her husband.
It also suggests that starlight will guide her return to the great city. Starlight here may mean us, the player. Our part of her plan is to guide her back to Hyperborea for her to continue her previous plan of rebelling against the Heavenly Principle.
It is currently unknown what happened to Suitervoinen but considering that she will wait for his freedom means he is not yet died.
Koitar's power is related to Cryo. Boreas spend time with her and either gain power or blessed at the time. Boreas power is Anemo and Cryo. Koitar's task as the angel is to love all creation and as God of Cryo, she is also suggested to be God of Love.
\\########################
\\\*How is Suitervoinen = Saarelainen\\\*
We also know that 30 days after their marriage, the Funerary War began because Nibelung returned with Abyss power.
What if Nibelung didn't return by himself? What if he returned because Suitervoinen opened the abyss portal to get Nibelung's help to rebel against HP?
We know that before Funerary War, the 3 moon goddesses are on HP' side but still they got prisoned by Nibelung. Maybe the war is messy as each side gets their hands on winning pieces as they struggle to get the upper hand.
We know that Gnosis is made up of the remains of the third descender AND the dragon's elemental throne. We also know that the 1st descender (HP) and 2nd descender (Abyss Nibelung) made the gnosis together.
What if they don't work together? Rather, the parts that make up the Gnosis changed hands between them as the war progress which ultimately created the Gnosis? i.e at the start of FW, HP cut 3rd descender into 7 pieces. Fight happened, Nibelung got his hands on the 7 pieces and infused the dragon authorities upon them.
\\###################
\\\*How is Suertevoinen = Childe\\\*
We know that his memory is also wiped as part of the curse. We also know that he hasn't died in the literal sense because Koitar is waiting for his freedom.
One of the theme explored in Genshin is Samsara cycle.
In Sumeru, we see that repetition of fate begins anew with each Samsara cycle.
With Durin, we see that those with similar names may repeat the same fate.
And we see this with Ajax whose fate is repeating across the ages. And who is the current person named Ajax in this age? Childe.
Out of all the mentions of the Tsaritsa, Childe's voice line suggests that she is actually sweet towards him as compared to being ice cold as other characters mention.
Surtalogi tasked Skirk to find Suertevoinen. When Skirk found Childe in the Abyss, what if she had completed her task? But seeing how weak the current Childe is, she decided that the Suertevoinen she is looking for is not \\\*all\\\* there yet?
So maybe, Childe himself is not aware that he is at least a part of Suertevoinen and the Tsaritsa wants to gather all 7 gnosis to infuse into him to revive her lover.
Childe's namesake, Ajax is related to Ajax the Hero who is similar to the Saarelainen, whose ending being separated into 7 pieces aka the Gnosis.
And the Tsaritsa is Koitar who is gathering the Gnosis to revive him.
Theory on why Tsaritsa is Koitar:
Dainsleaf mentioned that the Cryo Archon has no love left for her people nor her people have any left for her.
Who are her people? Fatui and Snezhnayans?
The harbingers may be self-serving, with most of the fatui following their harbinger' commands. However, we occasionally come across some fatui officer or Snezhnayans who put the Tsaritsa above others or loyal to her. Plus, it's hard to imagine the entirety of a country having no love for their leader, much less a god of their country.
But what if her people is not Fatui or Snezhnayan? What if it's Hyperborean, seelie or fae because these are the group associated with the first angel?
The successor of Hyperborean, Frostmoon Scions are not part of Snezhnaya and butted heads with the Fatui. Based on Flins's note about the Tsaritsa, it suggests that the fae do not call her The Majesty, The Tsaritsa, albeit he jokes that 'we' here refers to The Light keeper. The seelies also are mostly mindless now.
Thus there's a high probability that her \\\*people\\\* mentioned are not the Snezhnayans, rather a group that has died off and thus cannot not love her as they have died. Add in the fact that part of her curse is to have her memory wiped, that could affect her in the way that she cannot love her people \\\*as she also cannot remember them\\\*. But I'm more impartial that her people are the hyperboreans that were fully extinct.
\\\*Spoiler\\\*
In 6.3, we went to the first Angel's prison in Amsvartnir and found out that the first Angel remembered her husband and her kin's fate during her time with Boreas.
Currently, the prison is \\\*empty\\\*. In the third note of ancient handwriting, it suggests that she return to her own land and waited for the freedom of her husband.
It also suggests that starlight will guide her return to the great city. Starlight here may mean us, the player. Our part of her plan is to guide her back to Hyperborea for her to continue her previous plan of rebelling against the Heavenly Principle.
It is currently unknown what happened to Suitervoinen but considering that she will wait for his freedom means he is not yet died.
Koitar's power is related to Cryo. Boreas spend time with her and either gain power or blessed at the time. Boreas power is Anemo and Cryo. Koitar's task as the angel is to love all creation and as God of Cryo, she is also suggested to be God of Love.
\\########################
\\\*How is Suitervoinen = Saarelainen\\\*
We also know that 30 days after their marriage, the Funerary War began because Nibelung returned with Abyss power.
What if Nibelung didn't return by himself? What if he returned because Suitervoinen opened the abyss portal to get Nibelung's help to rebel against HP?
We know that before Funerary War, the 3 moon goddesses are on HP' side but still they got prisoned by Nibelung. Maybe the war is messy as each side gets their hands on winning pieces as they struggle to get the upper hand.
We know that Gnosis is made up of the remains of the third descender AND the dragon's elemental throne. We also know that the 1st descender (HP) and 2nd descender (Abyss Nibelung) made the gnosis together.
What if they don't work together? Rather, the parts that make up the Gnosis changed hands between them as the war progress which ultimately created the Gnosis? i.e at the start of FW, HP cut 3rd descender into 7 pieces. Fight happened, Nibelung got his hands on the 7 pieces and infused the dragon authorities upon them.
\\###################
\\\*How is Suertevoinen = Childe\\\*
We know that his memory is also wiped as part of the curse. We also know that he hasn't died in the literal sense because Koitar is waiting for his freedom.
One of the theme explored in Genshin is Samsara cycle.
In Sumeru, we see that repetition of fate begins anew with each Samsara cycle.
With Durin, we see that those with similar names may repeat the same fate.
And we see this with Ajax whose fate is repeating across the ages. And who is the current person named Ajax in this age? Childe.
Out of all the mentions of the Tsaritsa, Childe's voice line suggests that she is actually sweet towards him as compared to being ice cold as other characters mention.
Surtalogi tasked Skirk to find Suertevoinen. When Skirk found Childe in the Abyss, what if she had completed her task? But seeing how weak the current Childe is, she decided that the Suertevoinen she is looking for is not \\\*all\\\* there yet?
So maybe, Childe himself is not aware that he is at least a part of Suertevoinen and the Tsaritsa wants to gather all 7 gnosis to infuse into him to revive her lover.
Commentaires
if she is Koitar she would have regained her memories pre-Archon war or at least during the the war, since powered up Boreas was involved in the war.
The Tsaritsa has only been Cryo archon for 500 years, so where was she before that?.
The Tsaritsa is also confirmed to be the daughter of the Tsar the previous Cryo archon as far as I know, and this wont exactly work with her being Koitar (technically a daughter of HP)
Anyway, she is waiting for a descender (us). She won't challenge HP without the descender. Even two of her harbingers (Dottore and Sandrone) know how important the descender factor is.