DiMA

DiMA is a synth character on The Island in 2287. He is a possible antagonist in the Fallout 4 add-on Far Harbor.

Background
DiMA, along side with Nick Valentine, is one of the only two prototypes the Institute ever manufactured. While DiMA is allowed to freely develop his own personality, Nick experienced memory transferring in order for the scientists to see if they can move a living human personality into a synth body. DiMA, feeling remorse and empathy toward Nick, whom he regards as his brother because they are the only two of the same unique model, after seeing Nick going through various experiences that caused him to repetitively lose his memory and identity, decided to help Nick escape the Institute. However, when the two escaped, Nick, who was still under the effect of all the things done to him in the lab, started attacking DiMA, forcing him to knock Nick out and leave him. Afterwards, DiMA came to Far Harbor and, after spending a whole year alone sitting in a cave, decided it was time for him to venture out the world and define himself. Only after a very long time, about a century afterwards, do the two meet again when the Sole Survivor is sent to Far Harbor to investigate a missing case. DiMA expresses joy, feeling pleased that he is finally reunited with his "brother" again- although the case does not seem to be the same with Nick.

DiMA himself, though initially appears friendly and keeps the people interest at best, has some deep buried secrets related to the conflict on the island. First, before he set up Acadia, tension between Far Harbor and synths was high. DiMA, desperate to find a way for his people, decided to kill Captain Avery and replace her with a synth, something he shows great remorse and guilt about, so he can have a "moderate voice" able to calm the residents of Far Harbor. Second, he devised a contingency plan to shut down the power source of Far Harbor which would effectively mass murder all of the residents in fear of them attacking his synths. Lastly, he possesses the detonation key of the submarine's nuclear missile that, if activated, will destroy the Children of Atom base. All three of the pieces of memory are locked away from DiMA himself, as he cannot bear neither the thought of mass killing, nor the guilt over the murder he committed. Unfortunately for DiMA, when the situation of the island worsened, he had to take back those memories again to seek for a truce between the three factions.

Effects of player's actions
Based on the player character's actions, DiMA can become an ally or an enemy.

If the player opt to go on with DiMA plan, he will provide guidance for the next step of replacing leader of the Church of the Children of Atom

If the player successfully convince him to turn himself in, he will go to Far Harbor town and be executed by the local people for his crime

If the player decide to eradicate either one of the other two factions, DiMA will not turn hostile but will express disgust at the act of mass murder.

If the player choose to either destroy Acadia or reclaim all the synth to the Institute, DiMA will make the last stand with his people

Appearances
DiMA appears only in the Fallout 4 add-on, Far Harbor.