Bobbi No-Nose brought in several workers to assist with excavating a tunnel through the Boston underground to the alleged Diamond City strongroom, in order to rob it, which is actually a cover for a heist she is planning against Hancock, called the Big Dig. Upon the arrival of the Sole Survivor, Bobbi begins to look for a way to speed up the digging after her miners are driven out by mirelurks. She remembers her old contact and tech expert Mel, who is skilled in robotics. Before being imprisoned in the DC lockup for attempting to tamper with the automated waiter Wellingham, Mel was working on a heavily modified eyebot he named Sonya designed to blast through loose sediment with a powerful sonic pulse.
Due to the force exerted by Sonya in the strongroom basement, she will be deactivated.
Sonya can be hacked and commanded to follow the player with the appropriate perk.
Her successor, Sonya Mk. II, may be encountered together with Mel as a random encounter in the wasteland after the quest has been completed.
This version is not essential and may already be dead when the player encounters her and Mel. Selecting her corpse in the console, then using recycleactor and moveto player, will cause her to come back to life and resume following Mel.