The horrors you’ve lived through have hardened you. You have Advantage on saving throws to avoid being Frightened.
Infectious Bravery. If you take this trait twice, you can use your Reaction to bolster the spirits of your allies, granting one ally who can see or hear you Advantage on a saving throw against being Frightened. You can use this feature a number of times equal to your Proficiency Bonus, regaining all expended uses when you finish a Long Rest.