If one is playing in Survival modethe companion must be healed when incapacitated, even after combat. If incapacitated, they will automatically heal after combat ends. Unlike Fallout 3companions are marked as 'essential' when acting as active companions, meaning they cannot be killed. Sign In Don't have an account? Start a Wiki. Fandom may earn an affiliate commission on sales made from links on this page. Here is how the table below represents those changes. Companion affinity is gained and lost with two varying degrees for both. The base game has 13 companions four more are available with the AutomatronFar Harborand Nuka-World add-ons.