Shadow Demon- Shadowhunters

Echo Fairchild, older sister to Clary Fray, knows about the Shadow World. The day that Clary turns 18, is a day that she would never forget. Secrets get out and their world is about to change.
Although there is something peculiar about Echo, she is different than that of a normal Shadowhunter. She was born in Idris but raised in the mundane world, but that won't stop her from transitioning into something nobody had suspected.