A red-haired Shadowhunter with Persian roots, Cordelia is fiercely brave in battle and struggles with societal expectations while finding connection and purpose among her new friends in London.

The creative and adventurous younger sister of James, Lucie is kind-hearted and discovers a unique power, striving to prove her worth within her family and friends circle.

A fashionable and witty Shadowhunter with a taste for the good life, Matthew, James's parabatai, hides deeper secrets and is drawn to a world full of magic and Downworlders.

An ethereal-looking young woman, Grace is the adoptive daughter of Tatiana Blackthorn, who plays a mysterious role in the story yet holds a significant connection with James Herondale.

Cordelia's older brother, Alastair initially comes across as cold and arrogant but gradually reveals deeper layers driven by personal challenges and past experiences.

A striking and independent Shadowhunter known for her fashionable men's attire and wit, Anna challenges societal norms and has connections in both Shadowhunter and Downworlder societies.

The pale, dark-haired ghost of Tatiana's son, Jesse maintains a secret existence known by few and forms an important friendship with Lucie Herondale.

A smart and inventive Shadowhunter with a passion for science, Christopher is part of the Merry Thieves and plays a key role in battling the demon threat.

A tall, muscular Shadowhunter known for his gentle nature, Thomas is a member of the Merry Thieves and faces emotional struggles while showing great bravery.

A reclusive and bitter figure in Shadowhunter society, Tatiana harbors a deep grudge against prominent families and plays a pivotal antagonist role in the story.

A Prince of Hell and the major antagonist, Belial's ultimate goal involves manipulating events in London to his advantage while hiding in a human guise.