Companion Perks in Fallout 4 are perks you gain via Companions.
||Action points regenerate faster if your health is below 25%.
||+10 damage resistance against robot energy weapons.
||Once per day, heal 100 points if health falls below 10%.
||Cloak and Dagger
||+20% sneak attack damage and the duration of effects of Stealth Boys are increased by +20%.
||Know Your Enemy
||Damage +20% against Ferals, Super Mutants and Synths.
||At 250 rads or higher, get criticals 20% faster.
||Headshots in V.A.T.S. increased by 20%.
||Close to Metal
||One extra guess and 50% faster terminal cooldown when hacking.
||Gift of Gab
||+100% XP bonus for speech challenges and discovering new locations.
||United We Stand
||Damage +20% and +20 damage resistance when facing three or more opponents.
||When below 25% health, melee weapon damage increases by +20%.
||+20 damage resistance vs. energy.