Stheno is a Greater Demon.


In the 1870s, near the end of the negotiations for the First Accords, Stheno was ravaging the countryside of Cyprus. The local Nephilim fought against him, and Stheno even killed the head of the London Institute, Granville Fairchild, who had come to the aid of the Cypriot Shadowhunters.

In 1894, Stheno was found in Scotland and dispatched back to the Void by a team of English Shadowhunters; he had been in disguise but was recognized because he was wearing Fairchild's favorite Ukrainian fur hat—a gift from Josiah Wayland.