When Perenelle Flamel is abandoned on Alcatraz, she meets Areop-Enap who she has met before on prior occasions.
Examples include Harry Potter and the Philosopher's Stone by J.K. Rowling, and The Sorceress: The Secrets Of The Immortal Nicholas Flamel by Michael Scott in which Perenelle is a main character.
The Secrets of the Immortal Nicholas Flamel | Nicolas Flamel | The Alchemyst: The Secrets of the Immortal Nicholas Flamel | Perenelle Flamel |