Friendly is one of the 23 available perks that currently exist in Deep Rock Galactic. It can be unlocked on the first row of perks and there are 1 tiers; each tier requiring 2 perk points respectively for a total of 2.
Perk Table[edit source]
|50 %||Through the power of friendship you both take and deal 50% less damage from friendly fire!|
This perk does not stack if both the damage dealer and damage taker have it equipped. It also does not affect self-inflicted damage.