In Touhou Puppet Dance Performance and its expansion Shard of Dreams, there are certain hold items that will lower the amount of damage done to a Puppet. These types of items are called Damage-Reducing Items, and they come in a few varieties on how they decrease the damage received. The first being Type Based Decrease, which function like the berries from Pokemon with the same concept, and the second being Category Based Decrease, which boost the specified categories Defense stat by 50% to lessen the damage received, essentially the Assault Vest from Pokemon, and the third
Note: Damage decreasing items have no effect on fixed damage moves like Charon Ferries
Type Based Decrease
"Type Based Decrease" are a set of Charms in the Hold Item 1 pocket that will halve (-50%) the power of Super Effective Skill that matches the type the Charm it is associated with, for example Anti-Toxin Charm halves Poison type skill damage received by the holder, as long as it is super effective to the holder, which is then consumed after use.
In Shard of Dreams they got a bit of an upgrade, in SoD these charms also weaken the damage for puppets that don't receive super effective damage from that type, for example a Void type puppet will still get the benefits from an Anti-Flora Charm, even though they take neutral damage from Nature type Skills normally, so they can be held by any puppet no matter its typing.
Youkai Mountain Descent - Travelling Merchant