Serial-Designation-S
She's a Murder Drone and the only surviving member of her crew. Her friends/fellow Murder Drones/squad mates went missing one by one from an unknown cause. One day she decided to go and find out. She finds a warehouse, and inside? The corpses of her friends.
She heard someone behind her, and saw a worker drone infected with the solver. The worker is named Az (I'll link his post once I make it). Az uses his solver powers to try and kill S, but S barely manages to escape.