Eliza Harmon, was a scientist of Mercury Labs who gained the power of super speed by taking the Velocity 9 formula created by Caitlin Snow. After using the Velocity 9 Eliza got a second person living in her body who was evil and wanted to rob and kill people all the time, opposite of Eliza’s normal personality who was kind and helpful. Eliza wore a suit as her super-villainess alter-ego, Trajectory, to hide her identity from her victims. Eliza had become addicted to the Velocity serum. 