William Ginter Riva is a former Stark Industries employee who is ordered by Obadiah Stane to replicate Tony Stark's arc reactor. Years later, in 2024, he joins Quentin Beck's crew to wreak havoc across Europe, helping him masquerade as a superhero named Mysterio, and controlling his drones. Following Mysterio's death, he leaks the identity of Spider-Man to J. Jonah Jameson, and uploads a copy of Mysterio's software onto a flash drive.