DiMA

DiMA is a modified synth on the Island in 2287. He is the founder and leader of Acadia.

Background
DiMA, alongside Nick Valentine, is one of two early prototypes created by the Institute to test if synths could handle independent thinking and judgement. While DiMA was allowed to freely develop his own personality through experience, Nick was outfitted with a human personality. Due to the pair being so unique, they were close, with DiMA referring to Nick as his 'brother'. The two eventually escaped the Institute together. However, disoriented by the experiments, Nick did not recognize DiMA, and, believing he was the human Nick Valentine, attacked DiMA, forcing DiMA to knock him out and then abandon him for unknown reasons.

Afterwards, DiMA traveled to Far Harbor to hide from the Institute, though without a programmed objective, sat in a cave for nearly a year before it occurred to him that he could define his own path. He then went on to live in an old nuclear-armed submarine base that was eventually discovered by the Children of Atom. DiMA befriended their leader, Confessor Martin, and eventually gave them the base as their home

Alongside Faraday, a synth scientist that acts as his assistant, and Chase, an ex-courser that DiMA was able to convince to defect from the Institute, DiMA went on to found Acadia with the intention of creating a safe place for synths to live freely and not have to hide. From there, DiMA was able to develop fog condensers to protect the residents of Far Harbor from the Fog, which consequently angered the Children, as the Fog is sacred to them.

With tensions high between the Children, Acadia, and Far Harbor, DiMA, desperate for peace and safety for his own people, created contingency plans in the event that either group endangered Acadia--keeping the key to the nuclear missile in the Children's Nucleus and the shut down codes for Far Harbor's wind farm and only power source. Then, in his desperation, DiMA chose to kill Captain Avery and replace her with a synth as to have a "moderate voice" to be an example of how synths and humans could live side by side. DiMA was so sickened by his own actions that he chose to remove these memories and, as a sign of good faith, put then in the Nucleus' computers for the Children to safeguard.

Sometime later, DiMA and Nick are reunited when Nick and the Sole Survivor travel to Far Harbor looking for Kasumi Nakano. While DiMA expresses surprise and excitement to see Nick again, Nick is far more reluctant, not having any memories of DiMA due to their last encounter being over a hundred years prior--memories DiMA has been able to maintain through many modifications. However, if the Sole Survivor encourages Nick to accept DiMA as his brother after finding the holotape of their fight, Nick will apologize to DiMA and the two will occasionally greet each other or chat when entering Acadia.

Effects of player's actions
Based on the player character's actions, DiMA can become an ally or an enemy.
 * If the player character opts to go on with DiMA's plan, he will provide guidance for the next step of replacing leader of the Church of the Children of Atom.
 * If the player character successfully convinces 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 character decides 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 character chooses 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.