This post has no spoilers, not even after the jump, because she's too central to offer any information on. She's on par with a few other figures who won't even get a post at all. But I can tell you a few things about her.
To fulfill Kirin’s command, Matilda and Ng married and moved back to Britain to raise the child.
Abigail was born beneath an auspicious sign of the pheonix and enjoyed a well-heeled British life, thanks to her mother’s lingering fortunes and her father’s mysterious wealth. Her father raised her in the ways of the tea ceremony, and her mother raised her as a proper British lady. While they journeyed off to China to prepare her entrance into the cult, Abigail was left in a boarding school, dreaming of a new life for herself where she could decide for herself what she wanted to be, rather than being forced to live up to her parents’ legacy.
On her 16th birthday, the time of her sacrifice came and she journeyed with her parents to China to become the saintess of the Tea Blossom Cult.
Unwittingly ascending to godhood didn’t set well with Abigail. She understood it. She felt as though it had always been there, but she found it unduly interfered with her life. And so, in a fit of teenage pique, she left England when she turned 18 and chose to study journalism in the University of British Colombia. She remained duty bound to serve Kirin, though, and so Kirin shifted Peng Lai to connect to Vancouver, embedding Sun Yat Sen’s garden throughout Vancouver’s history.
She was found killed in an abandoned warehouse by an unknown assailant.
Abigail's flowers were the Alyssym (the Key of Something Spiritual) and the Gorse (the Key of Something in Thrall). She had the Cult of the Tea Blossom (with both Sin-Feng and Xuan) as her (known) anchors. She followed the Song of Heaven, for Abigail sought to make the world a better place.