The younger twin who possesses a pure gold aura. He is deeply skeptical of magic and fears the growing gap between himself and his sister, making him vulnerable to manipulation. The Immortals
Characters are continuously pushed to decide whether they are bound by the ancient prophecies of the Codex or if they can forge their own paths.
The main antagonist, a real historical advisor to Queen Elizabeth I. He is a brilliant necromancer serving the "Dark Elders" who wish to reclaim the Earth and wipe out humanity.
A 10,000-year-old Celtic warrior goddess who looks like a 17-year-old girl. She is a master of martial arts and a vegetarian vampire who aids the Flamels.
The wedge that magic drives between the twins highlights the fragile nature of family and absolute trust.
The series is built on a simple, fascinating rule: all human characters are based on real historical figures, and all non-human characters are pulled from global mythology. The only completely invented main characters are the teenage twins.