Julian Blackthorn is a fictional character from the young adult fantasy series, The Dark Artifices, written by Cassandra Clare. He is a Shadowhunter, a member of a group dedicated to hunting demons and protecting the human world. Julian is known for his strong sense of responsibility, especially towards his family, as he is the caretaker of his younger siblings after the tragic events that affected their lives. In the series, Julian is characterized by his artistic talent and deep loyalty to his loved ones. He has a complex relationship with Emma Carstairs, a fellow Shadowhunter, which adds emotional depth to his character. Julian's journey explores themes of love, sacrifice, and the challenges of leadership within the Shadowhunter community.