Guts is a universal mechanic shared by all characters.
Guts is a damage modifier applied to damage based on the remaining health of the character hit by a given attack.
If an attack is comprised of two or more hits, the damage scaling caused by guts is applied on a per-hit basis. This means that if the first hit applies damage when the target's health is 61% or more, then the damage of that hit is scaled by 100%, but if the second hit is applied when the target is at 60% or less health, then the damage of the second hit is scaled by 95%.
|Health Threshold||Damage Modifier|
|60% ~> 41%||95%|
|40% ~> 21%||90%|
|20% ~> 11%||85%|