Wretch was born because Dhumin raped Anonya (Dhumin x Ryatah) one time after Ryatah died because like most of the men in Ryatah's life, he wasn't sure how to handle his emotions. Anonya had previously had a semi-decent relationship with her father so the rape was extremely confusing and upsetting for her, and she had an very hard time loving Wretch. She raised her but there was an obvious detachment that Wretch always noticed.
She had a relatively good life though that I obviously can't remember literally at all. She murdered by Treyuh for some unknown reason I can't remember right after giving birth to her last daughter, Elentari.
And now she's alive. The end.