Sebastian Verlac

Origin: Shadowhunters
Hair:
Eyes:
Species: Shadowhunter
Cousin: Aline Penhallow
Occupation:
Talents: Runes
Residence: Horwood Street 15 (22-87)
Birthday:
Languages:
Import Date: Year 18 (+).

In 2016, Sebastian studied abroad, specifically at the Paris Institute in France.[1] There, he met Jonathan Morgenstern. He approached the boy, despite his monstrous appearance, and sat with him at a cafe. Charmed and envious,[2] Jonathan took Sebastian captive and went to New York with him. Sebastian was kept in Jonathan's closet while the latter took his identity.[3]
For a long time, Jonathan posed as him, and while his family feared that he was dead, they were eventually told that he was safe but was staying away from London. Six months after he went missing, his cousin Aline Penhallow came to the New York Institute, where Jonathan was keeping up a charade as him, the charming Englishman who helped Isabelle Lightwood recover from yin fen addiction and advised them how to slay the Greater Demon Azazel. To avoid suspicion, Jonathan demanded that Sebastian tell him everything there is to know about Aline, threatening her life if he didn't. Jonathan then told Aline that he wanted to stay in New York, giving him more time to pose as Sebastian. Shortly after, Sebastian managed to cut away from his restraints and escaped. Before he could approach Aline at the Institute, Jonathan caught up to him and killed him.[4]
Jonathan later brought back his corpse to the apartment he and Valentine were staying at and had abandoned after Jonathan was caught. As a precaution, they left his body with a possessing demon, which Isabelle, Clary, and Jace found. They paid their respects to him after finding him, and killed the demon that had possessed him when it almost attacked them. They promised to make Jonathan pay for what he did to all of them.