Ashes of khaenri'ah

Five hundred years before the events of the present day, Thrain - now known as Capitano, the First of the Fatui Harbingers - was a noble commander in Khaenri'ah and deeply in love. But when the Cataclysm struck without warning, he believed his lover and their unborn child perished in the destruction, having last seen them swallowed by abyssal flames.
Unbeknownst to him, they survived.
His closest friend, Misha - the. son of Pierro - protected her and helped her flee to Mondstadt, where they lived in hiding. Though she eventually passed, her child lived on, free from the curse that afflicted pure-blooded Khaenri'ahns.
Centuries later, Y/N, a descendant of Thrain's lost bloodline, lives peacefully under Misha's guardianship, unaware of the truth behind her ancestry. Only a few in Mondstadt know the full story - including Varka and the Anemo Archon himself.
Now, as ancient powers stir once more and Capitano is drawn back into the heart of Teyvat's chaos, fate leads him to an encounter with someone carrying the legacy he thought forever lost...
A story of buried truths, eternal bonds, and the haunting weight of immortality.