Jesse Blackthorn is the son of Tatiana and Rupert Blackthorn, and the adoptive older brother of Grace Blackthorn. He died at a young age like his father and returned as a ghost. As a baby, Jesse required the protection spells placed on Nephilim shortly after birth; however Tatiana had grown distrustful of Shadowhunters and would not allow the Silent Brothers to perform the spells. Instead she put word out in Downworld seeking someone willing to do it. Emmanuel Gast was the only warlock…
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