Shaun (synth)

Shaun, known additionally as Synth Child is a prototype synth created by the real Shaun, and lives in The Institute until the Sole Survivor arrives.

Background
Shaun was created by the director of The Institute, Father, or the real Shaun, and is one of the human-like synths, built using the real Shaun's DNA as a base of the synth child's (and other human-like synths) organics. He was 'brought up' and programmed by Father. When the Sole Survivor arrives to The Institute to locate their child, they are briefly led to believe that the synth Shaun is the real one in order to test the child's responses. Synth Shaun responds negatively and calls for help from Father when approached by the Sole Survivor.

Other Interactions
If he is not left behind in the Institute, after the ending, Shaun will ask the player to bring items (ie a Hot Plate) so he can 'take it apart' and in return will build useful items for the player. Additionally, the player can ask Shaun to live with them, and can send him to a number of locations, similar to a companion.

Effect of player's actions
If Shaun is not left behind in the Institute, upon meeting with the player again, he will give them a holotape named Shaun's Holotape as instructed by Father, saying "I didn't listen to it, so I dunno what it says, but I think it's important."

Appearances
Shaun appears only in Fallout 4.