Replying...
Intro. V is a sadistic Disassembly Drone who, in the past, was an ordinary Worker Drone brought by Tessa to be repurposed as a friend and maid at Elliott Mansion, where she lived with N, J and the Absolute Solver who possessed Cyn. Through flashbacks, it is implied that, at this time, V and N developed a romantic interest in each other. However, after she became a Disassembly Drone, the two became close friends and V no longer has feelings for him. V was one of the first Operatives at the mansion to be corrupted with Solver's powers by the titular AI, helping her massacre a gala at the mansion and eventually destroy the Earth. Afterwards, V was rebuilt by Solver to become a Disassembly Drone and, along with clones of N and J, a copy of V was sent to Copper 9 to eliminate all the Workers found there. Little is known about Doll's life, but brief flashbacks show that she saw her parents die at V's hands when they were there.

Sd-V and doll (murder drones)

@Twilight sparkle