You can really take a hit, and can survive longer in battles than others.
Toughness: You receive a bonus 2 Hit Points. This talent can be taken multiple times equal to your Health, its effects stacking.
Fortitude: You receive a bonus 2 Stamina Points. This talent can be taken multiple times equal to your Stamina, its effects stacking.
Second Wind: Once per encounter you can recover a number of Hit Points equal to half your total Hit Points, or alternatively you can recover from a single status effect so long as it isn't Severe Intensity. This can only be done on your turn, and only while conscious.
Deathless: You do not fall unconscious when at 0 HP, instead only going down when you are well and truly dead. You also instead die at negative HP equal to 10 + (Health x 2).
Trauma Response: If an attack reduces you to 0 HP you don't bleed out but immediately stabilize, your blood loss being much more limited. This effect takes place whether or not you are conscious.
Thick Skin: Against nonlethal damage you reduce the damage by 5. This counts before factoring against armor. In addition to this, armor worn takes half damage to its Defense Points from nonlethal damage.