Lysanna

Lysanna was a normal girl before she was sent to Aretuza. Having grown up in Flotsam, she grew familiar with the politics and violence that plagued the world. As much as she loved the riverside town, she was secretly glad to be sent away by her wealthy merchant father. It wasn't like there was much in Flotsam waiting for her anyways.
She began to study her magic with a sort of fervor only attributed to the fact she defined herself by being a powerful sorceress. She came from nothing, she was nothing without Aretuza, without magic, so she refused friendships to focus on her studies. Isolation meant space and space meant she was able to become stronger than many of her classmates.
She then was sent to village to village, attempting to find a home, only to be taken in by a small group of Nilfgaardian soldiers. They quickly seized her after she asked them for directions, and brought her to king Emhyr who made her a deal. She was either to serve him, or die in prison. She chose to serve him, hesitantly, and was put into dimetrium bangles, only to be removed when anyone needed her. Cursing her naivety, Lysanna quickly began to hate Nilfgaard and everything it stood for. Using what little materials she could get her hands on, Lysanna created a purple crystal that, hypothetically, could call for help without her needing to touch it.
She put it in her pocket, and when her shackles were removed, she activated the crystal. No one answered. She soon assumed it was just a dud, that her magic did nothing, except that night, she first heard a song, a tune with some instrument she couldn't make out. There was a heavy static in the background. Then, 3, 9, 7, 1, 5, 3, 9, 7, 1, 5 over and over again, a voice repeated the numbers.
This didn't stop. No, for weeks she heard nothing but numbers, static, and voices. Songs, static, screams. All of it played over and over again in her head, and she soon became paralyzed from the sounds and static. She thought it a cursed, when in reality the crystal turned her into an antenna for radio stations from across the multiverse that the Witcher series takes place in. Her screams went unheard, her pleas for silence was for naught, and she soon attempted to end her life by jumping out the window her tower had.
It broke her dimetrium shackles, but also her legs. Crawling to the alleyway, the static and numbers still playing in her head, she healed herself after several hours of pain and fled Nilfgaard, the crystal still in her pocket.
This time, for a week straight, she heard only War Broadcasts, and found herself horrified by what she assumed was the future. She cried, ran, screamed, begged anyone who'd listen for mercy, for them to bring her quiet.