Verse:Mwail/Ròdh Xa̱y
(Modern Standard Thean) [Given name TBD] Xay¹¹, reverently referred to as Naa¹³ Xay¹¹ ('Lady Xay¹¹') by her worshippers, was an Old Thean xenharmonicist composer.
[I don't know if she will be Thean...]
Life
Xay¹¹ was born into a technological world much like ours. She gained wide appeal within the Angaian [what age?] xenharmonic community for her compositions, approach to xenharmony, and various other accomplishments. Xay¹¹ died an untimely death (due to violence according to the earliest available sources).
After Xay¹¹'s death, climate change caused most of the existing Internet infrastructure to submerge underwater, causing most data online to be lost. Thus historical sources from her lifetime are scant and the first available sources are by her acquaintances relying on their memory. Many of these people apparently had supernatural experiences involving her.
Growth of the Lady Xay¹¹ cult
In the first few centuries after Xay¹¹'s death, oral tradition played a big role in developing and maintaining the folk religious material about Xay¹¹
Divine attributes
Lady Xay¹¹ is a goddess of wisdom and craftiness. Her allegedly unjust death led her to being regarded as a deity of justice able to avenge others who suffered injustices (according to post-apocalyptic Thean beliefs, such a death in addition to being a great figure during one's lifetime boosts one's spirit's power as a posthumous god).