Although she had left the gang, stealing from Homer Straggen on her way out, she was captured by agents of Fulko Artevelde, a Nilfgaardian governor and condemned to death. As a partial reprieve, she was offered a quick death if she agreed to become a crown witness in the investigation into the Nightingale gang. She cooperated with Fulko and through him, met Geralt who had also been pulled in for questioning.
Fulko needed the witcher and his companions to hunt down and eradicate the Nightingales. Reluctantly, the witcher agreed but demanded that Angoulême be released into his custody as a condition for his cooperation. Angoulême then joined the witcher's company in their search for Ciri.
She was quite fond of using rather salty language and persisted in derisively calling most of the men she encountered "uncle". She also had a habit of calling Milva "auntie", which infuriated the archer.
She was seen using a dagger and a saber with a degree of competence, and was also seen using a throwing axe.
While Geralt and this companions wintered in Toussaint, Angoulême decided that once the group had found Ciri, she would open her own bordello, a high-class establishment.
She died from blood loss due to a spear wound in her thigh which she sustained defending Ciri during the Assault on Stygga castle.