Fallout 4 Companions

Permanent companions
The game has 13 companions :

Automatron companions

 * Ada, a robotic, fully-customizable companion.

Far Harbor companions

 * Old Longfellow

Temporary companions
The game has a number of temporary companions that will only be available during certain missions.

Interests
Companion affinity is gained and lost with two varying degrees for both. Here is how the table below represents those changes: {{Legend }}
 * symbol1 =YesYes
 * desc1   =Actions that are loved.
 * symbol2 =Yes
 * desc2   =Actions that are liked.
 * symbol3 =No
 * desc3   =Actions that are disliked.
 * symbol4 =NoNo
 * desc4   =Actions that are hated.

Bugs

 * A companion may become stuck in a "crucified" position, flying around about 1-2 feet off the ground following the player. The companion can be spoken with and interacted with in a normal manner, however the companion will not fight. Even loading a new area by going through a door will not fix this behavior.
 * One potential fix is to fast travel to another location.