When your companion faces physical hardship, they suffer -1 health for minor harm, -2 for serious harm, or -3 for major harm. If your companion's health is 0, Lose Momentum equal to any remaining harm.
Then, if their health is 0 or you choose to test their resilience, roll +your companion's health.
On a strong hit, your companion rallies. Give them +1 health.
On a weak hit, if your companion's health is not 0, you may Lose Momentum (-1) and give them +1 health. Otherwise, they press on.
On a miss, it's worse than you thought. They suffer an additional -1 health or you Lose Momentum (-2). If your companion's health is 0, they are out of action until given aid. If their health is 0 and you rolled a miss with a match on this move, they are dead or destroyed; discard the asset.