Olivia is a ymbryne child who got stuck in her owl form permanently.
Early Life[]
At some point in her child hood, Olivia was found and would be sent to the Ymbryne Academy. She resided there for a couple years before she had some form of accident. Somehow she wound up stuck in her owl form. The older ymbryne's at the school tried everything before eventually taking her to Balenciaga Wren after five days. Wren tried her best, but was unable to help her.
Since Olivia couldn't act as a ymbryne in the future, it was decided to leave her at Miss Wren's loop. She would live there for ten years before the events of Hollow City
Hollow City[]
When word about what was happening in London, Miss Wren left to try and help. At some point a hollowgast arrived inside the loop. A few days later, Alma Peregrine wards arrived to try and find Miss Wren. The group successfully killed the invading hollow.
Addison MacHenry, one of the talking animals in the loop, quickly led the group to where everyone else was and started introducing everyone. Olivia was introduced third (after Deirdre and the Armageddon chickens). When the group was sitting down to eat, the group revealed Alma Peregrine. Everyone was surprised, and Addison quickly explained how much of a danger Peregrine was in, revealing what had happened to Olivia.
The group quickly packed up and left, leaving behind Claire Densmore and Fiona Frauenfeld. Claire was sick, and none of the group wanted to leave her alone. A few hours after the group left, several wights raided the loop. They would take a lot of things from the loop. Deirdre the Emu-Raffe would be shot trying to stop the wight's raid. After a skirmish, Fiona would be thrown off the mountain and would be presumed dead by everyone.
Claire would be thrown into a sack and would be kidnapped. Eventually the wights would leave. The group buried Deirdre and Addison left for London to track down Miss Wren.
After Hollow City[]
It's presumed that Miss Wren, or someone else, would come back to the loop and would rescue the animals. Since Miss Wren considered the loop to be on the verge of collapsing, she would move her animals to a new loop. If Olivia was still alive, she would probably wind up in the loop.
Peculiarity[]
She was an ymbryne, which gave her the power to manipulate time and turn into a bird, specifically a barn owl. Since she was stuck in her bird form, she couldn't manipulate time.